Fibrous MoS2 / inorganic fiber cloth, preparation method thereof and photo-thermal evaporator

Abstract

The invention provides fibrous MoS2 / inorganic fiber cloth, a preparation method thereof and a photo-thermal evaporator. The fibrous MoS2 / inorganic fiber cloth comprises an inorganic fiber cloth base material and molybdenum disulfide attached to the surface of the inorganic fiber cloth base material. The fibrous MoS2 / inorganic fiber cloth can be used for efficient sunlight-heat conversion, so that the effect of rapid water treatment is achieved; the fibrous MoS2 / inorganic fiber cloth can automatically adsorb mercury ions contained in the wastewater, so that the mercury ions in the wastewater can be removed; and the fibrous MoS2 / inorganic fiber cloth can automatically repel oil drops in the wastewater, so that the removal of insoluble oil fractions in the wastewater can be realized. In conclusion, the fibrous MoS2 / inorganic fiber cloth can simultaneously remove mercury ions and insoluble oil fractions in wastewater, can be applied to the fields of seawater desalination, wastewater treatment and the like, and has important significance on industrialization and greening of a purification technology of wastewater polluted by heavy metals and oil-based pollutants.

Description

Technical Field

[0001] The present invention relates to the technical field of photothermal evaporators, and specifically, to fibrous MoS2 / inorganic fiber cloth, a preparation method thereof, and a photothermal evaporator, and more specifically, to fibrous MoS2 / inorganic fiber cloth capable of simultaneously removing mercury ions and insoluble oil fractions in wastewater, a preparation method thereof, and a photothermal evaporator, as well as application of the fibrous MoS2 / inorganic fiber cloth in wastewater treatment. Background Art

[0002] With the rapid development of industry and the growth of population, untreated complex wastewater poses a serious threat to ecological integrity as well as drinking water and food safety. For example, mercury (Hg), a well-known heavy metal pollutant, is discharged globally at an annual rate of about 2,000-3,000 tons. Even trace amounts of mercury can be enriched in low trophic chains and gradually amplified along the food chain, causing serious damage to human organs such as kidneys, liver, and lungs. Therefore, it is crucial to reduce the mercury concentration to the level of one part per billion (ppb) before the wastewater is discharged. At present, researchers have designed many materials that can treat mercury pollution. Among them, molybdenum disulfide (MoS2) has attracted widespread attention as an effective mercury adsorbent. However, these studies often focus only on treating mercury pollution, while ignoring the effects of other pollutants such as petroleum on mercury removal. In addition, complex wastewater generated by industrial production and human activities often contains not only mercury, but also various insoluble oil fractions. Due to the challenges brought by factors such as small droplet size, difficulty in demulsification, and high volatility of oil, the treatment of oil-water mixtures such as oil-containing emulsions has become a global challenge. Although a large number of studies have reported on the treatment of water-in-oil emulsions using solar evaporation, these studies often focus on the treatment of a single emulsion without considering other factors such as heavy metals. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a fibrous MoS2 / inorganic fiber cloth, which can effectively remove mercury ions and insoluble oil fractions in wastewater at the same time.

[0004] In one aspect of the present invention, the present invention provides a fibrous MoS2 / inorganic fiber cloth. According to an embodiment of the present invention, the fibrous MoS2 / inorganic fiber cloth comprises an inorganic fiber cloth substrate and molybdenum disulfide attached to the surface of the inorganic fiber cloth substrate. Thus, the photothermal properties of MoS2 enable the fibrous MoS2 / inorganic fiber cloth to have excellent photothermal conversion properties, so the fibrous MoS2 / inorganic fiber cloth can perform efficient solar light-heat conversion, and at the same time, the heat generated can enable the MoS2 / aluminum silicate fiber cloth to achieve rapid photothermal water evaporation, achieving the effect of rapid water treatment; the mercury ion adsorption capacity of MoS2 enables the fibrous MoS2 / inorganic fiber cloth to have good mercury ion adsorption properties, that is, the fibrous MoS2 / inorganic fiber cloth of the present invention can automatically adsorb mercury ions contained in wastewater, thereby achieving the removal of mercury ions in wastewater; in addition, the fibrous MoS2 / inorganic fiber cloth of the present invention has excellent superhydrophilic properties, so it can automatically repel oil droplets contained in wastewater, thereby achieving the removal of insoluble oil fractions in wastewater. In summary, the fibrous MoS2 / inorganic fiber cloth of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination and wastewater treatment. It is of great significance to the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants.

[0005] According to an embodiment of the present invention, the inorganic fiber cloth substrate includes aluminum silicate fiber cloth.

[0006] In another aspect of the present invention, the present invention provides a method for preparing the aforementioned fibrous MoS2 / inorganic fiber cloth. According to an embodiment of the present invention, the method for preparing fibrous MoS2 / inorganic fiber cloth comprises: preparing a precursor solution, wherein the precursor solution comprises a molybdenum-containing compound and a sulfur-containing compound; soaking an inorganic fiber cloth substrate in the precursor solution to obtain a soaking solution; placing the soaking solution in a reactor for hydrothermal treatment to obtain the fibrous MoS2 / inorganic fiber cloth. Therefore, in the above preparation method, the fibrous MoS2 / inorganic fiber cloth is prepared by using molybdenum disulfide (MoS2) as the active ingredient. The photothermal properties of MoS2 make the fibrous MoS2 / inorganic fiber cloth have excellent photothermal conversion properties, so the fibrous MoS2 / inorganic fiber cloth can perform efficient solar light-to-heat conversion, and at the same time, the heat generated can enable the MoS2 / aluminum silicate fiber cloth to achieve rapid photothermal water evaporation, thereby achieving the effect of rapid water treatment; the mercury ion adsorption capacity of MoS2 makes the fibrous MoS2 / inorganic fiber cloth have good mercury ion adsorption properties, that is, the fibrous MoS2 / inorganic fiber cloth of the present invention can automatically adsorb mercury ions contained in wastewater, thereby achieving the removal of mercury ions in the wastewater; in addition, the fibrous MoS2 / inorganic fiber cloth of the present invention has excellent superhydrophilic properties, so it can automatically repel oil droplets contained in wastewater, thereby achieving the removal of insoluble oil fractions in wastewater. In summary, the fibrous MoS2 / inorganic fiber cloth of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination and wastewater treatment, which is of great significance to the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants. Furthermore, the above-mentioned preparation method is simple and easy to implement and operate, and is convenient for industrial mass production.

[0007] According to an embodiment of the present invention, the molybdenum-containing compound includes at least one of hydrated ammonium molybdate, non-hydrated ammonium molybdate, hydrated potassium molybdate, non-hydrated potassium molybdate, hydrated sodium molybdate, and non-hydrated sodium molybdate; and / or the sulfur-containing compound includes at least one of thiourea and thioacetamide.

[0008] According to an embodiment of the present invention, based on the total mass of the precursor solution, the mass fraction of the molybdenum-containing compound may be 0.5% to 5%, and / or the mass fraction of the sulfur-containing compound may be 1% to 10%.

[0009] According to an embodiment of the present invention, the inorganic fiber cloth substrate is immersed in the precursor solution for 0.5 to 5 hours.

[0010] According to an embodiment of the present invention, the temperature of the hydrothermal treatment is 120-200° C., and the time is 5-20 hours.

[0011] According to an embodiment of the present invention, the method for preparing fibrous MoS2 / inorganic fiber cloth further includes: drying the fibrous MoS2 / inorganic fiber cloth, wherein the drying temperature is 60 to 110°C and the time is 0.2 to 2 hours.

[0012] In another aspect of the present invention, the present invention provides a photothermal evaporator, which, according to an embodiment of the present invention, comprises: the fibrous MoS2 / inorganic fiber cloth described above; a wastewater pool, in which a portion of the fibrous MoS2 / inorganic fiber cloth is immersed, and another portion is placed under light. Thus, the photothermal evaporator of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination, wastewater treatment, etc., and has important significance for the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants.

[0013] In another aspect of the present invention, the present invention provides the use of the above-mentioned fibrous MoS2 / inorganic fiber cloth in wastewater treatment. Therefore, the fibrous MoS2 / inorganic fiber cloth of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination and wastewater treatment, which is of great significance to the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0015] Figure 1 is a schematic structural diagram of a photothermal evaporator in one embodiment of the present invention;

[0016] Figure 2 is a scanning electron microscope image of the aluminum silicate fiber cloth and the prepared fibrous MoS2 / aluminum silicate fiber cloth in Example 1;

[0017] Figure 3 is a curve diagram of the change of water evaporation over time in darkness and sunlight in Example 1;

[0018] Figure 4 This is a test data diagram of treating mercury ion-containing waste liquid by a photothermal evaporator in Example 1;

[0019] Figure 5 This is a test data diagram of the photothermal evaporator in Example 1 treating a waste liquid containing an insoluble oil fraction;

[0020] Figure 6 This is a test data chart of Example 1 using a photothermal evaporator to treat waste liquid containing mercury ions and insoluble oil fractions. DETAILED DESCRIPTION

[0021] The scheme of the present invention will be explained below in conjunction with the embodiments. It will be appreciated by those skilled in the art that the following embodiments are only used to illustrate the present invention and should not be considered as limiting the scope of the present invention. Where specific techniques or conditions are not indicated in the embodiments, the techniques or conditions described in the literature in this area or the product specifications are used. The reagents or instruments used are not indicated by the manufacturer and are all conventional products that can be obtained commercially.

[0022] The present invention is described below with reference to specific embodiments. It should be noted that these embodiments are merely illustrative and do not limit the present invention in any way.

[0023] In one aspect of the present invention, the present invention provides a fibrous MoS2 / inorganic fiber cloth. According to an embodiment of the present invention, the fibrous MoS2 / inorganic fiber cloth comprises an inorganic fiber cloth substrate and molybdenum disulfide attached to the surface of the inorganic fiber cloth substrate. Thus, the photothermal properties of MoS2 enable the fibrous MoS2 / inorganic fiber cloth to have excellent photothermal conversion properties, so the fibrous MoS2 / inorganic fiber cloth can perform efficient solar light-heat conversion, and at the same time, the heat generated can enable the MoS2 / aluminum silicate fiber cloth to achieve rapid photothermal water evaporation, achieving the effect of rapid water treatment; the mercury ion adsorption capacity of MoS2 enables the fibrous MoS2 / inorganic fiber cloth to have good mercury ion adsorption properties, that is, the fibrous MoS2 / inorganic fiber cloth of the present invention can automatically adsorb mercury ions contained in wastewater, thereby achieving the removal of mercury ions in wastewater; in addition, the fibrous MoS2 / inorganic fiber cloth of the present invention has excellent superhydrophilic properties, so it can automatically repel oil droplets contained in wastewater, thereby achieving the removal of insoluble oil fractions in wastewater. In summary, the fibrous MoS2 / inorganic fiber cloth of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination and wastewater treatment. It is of great significance to the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants.

[0024] According to an embodiment of the present invention, inorganic fiber cloth is used as a substrate in the fibrous MoS2 / inorganic fiber cloth. The substrate has stable properties and good resistance to hydrothermal / solvent thermal treatment, ensuring good stability and not easy to denature during the preparation process of the fibrous MoS2 / inorganic fiber cloth. Moreover, by using fiber cloth as a substrate, a fibrous composite MoS2 / inorganic fiber cloth can be obtained, which is more conducive to the evaporation of photothermal water, thereby improving the efficiency of wastewater treatment.

[0025] According to some embodiments of the present invention, the inorganic fiber cloth substrate includes aluminum silicate fiber cloth.

[0026] According to the embodiment of the present invention, there is no special requirement for the shape of the fibrous MoS2 / inorganic fiber cloth. Those skilled in the art can flexibly design the shape of the fibrous MoS2 / inorganic fiber cloth according to actual needs, such as strip shape, square shape, circular shape or irregular shape.

[0027] In another aspect of the present invention, the present invention provides a method for preparing the above-mentioned fibrous MoS2 / inorganic fiber cloth. According to an embodiment of the present invention, the method for preparing the fibrous MoS2 / inorganic fiber cloth comprises:

[0028] S100: preparing a precursor solution, wherein the precursor solution includes a molybdenum-containing compound and a sulfur-containing compound.

[0029] According to some embodiments of the present invention, the step of preparing the precursor solution includes: dissolving the molybdenum-containing compound and the sulfur-containing compound in ultrapure water, and mixing them evenly to obtain the precursor solution.

[0030] According to some embodiments of the present invention, the molybdenum-containing compound includes at least one of hydrated ammonium molybdate, non-hydrated ammonium molybdate, hydrated potassium molybdate, non-hydrated potassium molybdate, hydrated sodium molybdate, and non-hydrated sodium molybdate; according to some embodiments of the present invention, the sulfur-containing compound includes sulfur-containing organic matter, such as at least one of thiourea and thioacetamide. The above-mentioned molybdenum-containing compound and sulfur-containing compound can effectively generate molybdenum disulfide in the subsequent hydrothermal reaction, and the synthesis efficiency is high, and the above-mentioned materials are widely available and the cost is low.

[0031] According to some embodiments of the present invention, based on the total mass of the precursor solution, the mass fraction of the molybdenum-containing compound may be 0.5% to 5% by mass, for example, 0.5%, 0.8%, 1.0%, 1.2%, 1.5%, 1.8%, 2.0%, 2.2%, 2.5%, 2.8%, 3.0%, 3.2%, 3.5%, 3.8%, 4.0%, 4.2%, 4.5%, 4.8%, 5.0%, etc. According to some embodiments of the present invention, based on the total mass of the precursor solution, the mass fraction of the sulfur-containing compound can be 1% to 10%, such as 0.5%, 0.8%, 1.0%, 1.2%, 1.5%, 1.8%, 2.0%, 2.2%, 2.5%, 2.8%, 3.0%, 3.2%, 3.5%, 3.8%, 4.0%, 4.2%, 4.5%, 4.8%, 5.0%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, etc. The above-mentioned content of the molybdenum-containing compound and the sulfur-containing compound can better react to form molybdenum disulfide. In some specific embodiments, the mass fraction of the molybdenum-containing compound can be 1.5% to 2.5%, and the mass fraction of the sulfur-containing compound can be 1% to 3%.

[0032] S200: Soaking the inorganic fiber cloth substrate in a precursor solution to obtain a soaking solution.

[0033] According to some embodiments of the present invention, the immersion time of the inorganic fiber cloth substrate in the precursor solution is 0.5 to 5 hours, such as 0.5 hours, 1 hour, 1.5 hours, 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, 5 hours, etc. In this way, the precursor solution fully wets the inorganic fiber cloth substrate and completely absorbs the molybdenum-containing compound and the sulfur-containing compound. In some specific embodiments, the immersion time of the inorganic fiber cloth substrate in the precursor solution is 0.5 to 2 hours.

[0034] According to some embodiments of the present invention, there is no special requirement between the area of ​​the inorganic fiber cloth substrate and the volume of the required precursor solution, and those skilled in the art can make a flexible choice based on actual conditions, as long as the inorganic fiber cloth substrate can fully absorb the precursor solution.

[0035] According to some embodiments of the present invention, the inorganic fiber cloth substrate may be cleaned in advance before soaking. For example, the inorganic fiber cloth substrate may be ultrasonically cleaned with ethanol. This process is repeated multiple times to ensure thorough cleaning. The ethanol solution is then carefully rinsed off with water, allowing the water to penetrate the inorganic fiber cloth substrate for multiple consecutive cleanings.

[0036] S300: placing the soaking liquid containing the inorganic fiber cloth substrate in a reactor for hydrothermal treatment to obtain fibrous MoS2 / inorganic fiber cloth. In this process, the molybdenum-containing compound and the sulfur-containing compound react on the surface of the inorganic fiber cloth substrate to generate molybdenum disulfide, and the molybdenum disulfide is attached to the surface of the inorganic fiber cloth substrate.

[0037] According to some embodiments of the present invention, the temperature of the hydrothermal treatment is 120-200°C, such as 120°C, 125°C, 130°C, 135°C, 140°C, 145°C, 150°C, 155°C, 160°C, 165°C, 170°C, 175°C, 180°C, 185°C, 190°C, 195°C, 200°C, etc., and the time is 5-20h, such as 5h, 8h, 10h, 12h, 15h, 18h, 20h, etc. Under the above conditions, the molybdenum-containing compound and the sulfur-containing compound can react fully and efficiently to generate molybdenum disulfide, thereby improving the reaction efficiency. In some specific embodiments, the temperature of the hydrothermal treatment is 150-200°C, and the time is 8-15h.

[0038] According to some embodiments of the present invention, the method for preparing fibrous MoS2 / inorganic fiber cloth further comprises: drying the fibrous MoS2 / inorganic fiber cloth obtained after the hydrothermal treatment. In some specific embodiments, after the hydrothermal treatment is completed, the fibrous MoS2 / inorganic fiber cloth is sufficiently cooled, and then ultrasonically treated with water and ethanol to remove the unreacted precursor solution on the surface and the molybdenum disulfide attached to the surface of the fiber cloth substrate.

[0039] According to some embodiments of the present invention, the drying temperature is 60-110°C, such as 60°C, 65°C, 70°C, 75°C, 80°C, 85°C, 90°C, 95°C, 100°C, 105°C, 110°C, etc., and the time may be 0.2-2h, such as 0.2h, 0.5h, 1.2h, 1.5h, 1.7h, 2h, etc. In some specific embodiments, the drying temperature is 80-100°C, and the time may be 0.4-2h.

[0040] According to an embodiment of the present invention, in the above-mentioned preparation method, the fibrous MoS2 / inorganic fiber cloth is prepared by using molybdenum disulfide (MoS2) as the active ingredient. The photothermal properties of MoS2 make the fibrous MoS2 / inorganic fiber cloth have excellent photothermal conversion properties, so the fibrous MoS2 / inorganic fiber cloth can perform efficient solar light-to-heat conversion, and at the same time, the heat generated can enable the MoS2 / aluminum silicate fiber cloth to achieve rapid photothermal water evaporation, thereby achieving the effect of rapid water treatment; the mercury ion adsorption capacity of MoS2 makes the fibrous MoS2 / inorganic fiber cloth have good mercury ion adsorption properties, that is, the fibrous MoS2 / inorganic fiber cloth of the present invention can automatically adsorb mercury ions contained in wastewater, thereby achieving the removal of mercury ions in the wastewater; in addition, the fibrous MoS2 / inorganic fiber cloth of the present invention has excellent superhydrophilic properties, so it can automatically repel oil droplets contained in wastewater, thereby achieving the removal of insoluble oil fractions in wastewater. In summary, the fibrous MoS2 / inorganic fiber cloth of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination and wastewater treatment, which is of great significance to the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants. Furthermore, the above-mentioned preparation method is simple and easy to implement and operate, and is convenient for industrial mass production.

[0041] In another aspect of the present invention, the present invention provides a photothermal evaporator. According to an embodiment of the present invention, referring to Figure 1The photothermal evaporator includes: the aforementioned fibrous MoS2 / inorganic fiber cloth 100; a wastewater pool 200, the wastewater pool 200 is used to contain wastewater 300, a portion of the fibrous MoS2 / inorganic fiber cloth 100 is immersed in the wastewater in the wastewater pool 200, and the other portion is placed under sunlight. Therefore, the photothermal evaporator of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination, wastewater treatment, etc., and has important significance for the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants.

[0042] According to some embodiments of the present invention, there is no special requirement for the number of wastewater pools 200 in the photothermal evaporator, and those skilled in the art can flexibly design it according to actual needs. In some embodiments, the number of wastewater pools 200 can be 1 or 2 (e.g. Figure 1 As shown), 3, 4, etc.

[0043] In some specific embodiments, the fibrous MoS2 / inorganic fiber cloth is in a rectangular shape, and both ends of the long fibrous MoS2 / inorganic fiber are immersed in the wastewater in the wastewater pool, and the middle part of the fibrous MoS2 / inorganic fiber is not in contact with the wastewater and is exposed to light (such as sunlight). The working principle includes:

[0044] The fibrous MoS2 / inorganic fiber cloth is immersed in the wastewater and partially absorbs water, and transfers the water to the outer part of the fibrous MoS2 / inorganic fiber cloth (i.e., the part not immersed in the wastewater, or the part exposed to sunlight) through siphon action. The outer part of the fibrous MoS2 / inorganic fiber cloth absorbs sunlight and converts the light energy of sunlight into heat energy. The heat energy heats up the fibrous MoS2 / inorganic fiber cloth, and then the water in this part evaporates at high temperature, so that the treated water (i.e., the water after degreasing and mercury removal) can be collected; The part of the fibrous MoS2 / inorganic fiber cloth immersed in the wastewater can directly adsorb the mercury ions in the wastewater, that is, the sulfur ions in molybdenum disulfide react with the mercury ions, thereby realizing the adsorption of mercury ions by the fibrous MoS2 / inorganic fiber cloth. This process is a chemical adsorption process. Since the fibrous MoS2 / inorganic fiber cloth has super hydrophilic properties, it can automatically repel oil droplets in the wastewater, causing them to remain in the wastewater pool, thereby realizing the removal of insoluble oil fractions in the wastewater. This process is a physical process, and the two processes of oil removal and mercury removal are independent of each other and do not affect each other.

[0045] According to some embodiments of the present invention, the wastewater pool may be further encapsulated with foam to prevent heat exchange. In some embodiments, melamine foam may be used for encapsulation.

[0046] In another aspect of the present invention, the present invention provides the use of the above-mentioned fibrous MoS2 / inorganic fiber cloth in wastewater treatment. Therefore, the fibrous MoS2 / inorganic fiber cloth of the present invention can simultaneously remove mercury ions and insoluble oil fractions in wastewater, and can be applied to the fields of seawater desalination and wastewater treatment, which is of great significance to the industrialization and greening of wastewater purification technology contaminated by heavy metals and oil-based pollutants.

[0047] Example

[0048] Example 1

[0049] The method for preparing fibrous MoS2 / inorganic fiber cloth comprises:

[0050] (1) The aluminum silicate fiber cloth substrate was carefully cut into 10 cm × 4 cm × 0.2 cm using a paper cutter. Subsequently, the aluminum silicate fiber cloth substrate was ultrasonically cleaned with ethanol. This process was repeated twice to ensure thorough cleaning. Subsequently, the ethanol solution was carefully rinsed off with water, and the water was allowed to penetrate the aluminum silicate fiber cloth substrate for continuous multiple cleanings.

[0051] (2) 6.0 g of sodium molybdate dihydrate and 7.0 g of thiourea were added to 500 mL of ultrapure water and dissolved to obtain a precursor solution.

[0052] (3) soaking the aluminum silicate fiber cloth substrate in the precursor solution and stirring for 1 hour to ensure that the aluminum silicate fiber cloth substrate completely absorbs the sodium molybdate and thiourea molecules;

[0053] (4) 70 mL of the precursor solution and the aluminum silicate fiber cloth substrate were transferred into a 100 mL polytetrafluoroethylene-lined autoclave, the autoclave was sealed and hydrothermally treated at 180 °C for 12 h to obtain fibrous MoS2 / aluminum silicate fiber cloth.

[0054] (5) After sufficient cooling, the fibrous MoS2 / aluminum silicate fiber cloth was ultrasonically treated with water and ethanol, and then dried at 100°C for 1 hour to obtain the fibrous MoS2 / aluminum silicate fiber cloth.

[0055] (6) The photothermal evaporator was made by immersing the two ends of the fibrous MoS2 / aluminum silicate fiber cloth in two quartz pools (4 cm × 1 cm × 5 cm). The area of ​​the MoS2 / aluminum silicate fiber cloth exposed to sunlight was about 16 cm 2 , thickness 2mm, and encapsulated the two quartz cells with melamine foam to prevent heat exchange.

[0056] Example 2

[0057] The method for preparing fibrous MoS2 / inorganic fiber cloth comprises:

[0058] (1) The aluminum silicate fiber cloth substrate was carefully cut into 10 cm × 4 cm × 0.2 cm using a paper cutter. Subsequently, the aluminum silicate fiber cloth substrate was ultrasonically cleaned with ethanol. This process was repeated twice to ensure thorough cleaning. Subsequently, the ethanol solution was carefully rinsed off with water, and the water was allowed to penetrate the aluminum silicate fiber cloth substrate for continuous multiple cleanings.

[0059] (2) 4.0 g of sodium molybdate and 2.5 g of thioacetamide were added to 500 mL of ultrapure water and dissolved to obtain a precursor solution.

[0060] (3) soaking the aluminum silicate fiber cloth substrate in the precursor solution and stirring for 1 hour to ensure that the aluminum silicate fiber cloth substrate completely absorbs the sodium molybdate and thioacetamide molecules;

[0061] (4) 60 mL of the precursor solution and the aluminum silicate fiber cloth substrate were transferred into a 100 mL polytetrafluoroethylene-lined autoclave, the autoclave was sealed and hydrothermally treated at 150 °C for 10 h to obtain fibrous MoS2 / aluminum silicate fiber cloth.

[0062] (5) After sufficient cooling, the fibrous MoS2 / aluminum silicate fiber cloth was ultrasonically treated with water and ethanol, and then dried at 80°C for 0.8 h to obtain the fibrous MoS2 / aluminum silicate fiber cloth.

[0063] (6) The photothermal evaporator was made by immersing the two ends of the fibrous MoS2 / aluminum silicate fiber cloth in two quartz pools (4 cm × 1 cm × 5 cm). The area of ​​the MoS2 / aluminum silicate fiber cloth exposed to sunlight was about 16 cm 2 , thickness 2mm, and encapsulated the two quartz cells with melamine foam to prevent heat exchange.

[0064] Example 3

[0065] The method for preparing fibrous MoS2 / inorganic fiber cloth comprises:

[0066] (1) The aluminum silicate fiber cloth substrate was carefully cut into 10 cm × 4 cm × 0.2 cm using a paper cutter. Subsequently, the aluminum silicate fiber cloth substrate was ultrasonically cleaned with ethanol. This process was repeated twice to ensure thorough cleaning. Subsequently, the ethanol solution was carefully rinsed off with water, and the water was allowed to penetrate the aluminum silicate fiber cloth substrate for continuous multiple cleanings.

[0067] (2) 10.0 g of potassium molybdate dihydrate and 20.0 g of thiourea were added to 500 mL of ultrapure water and dissolved to obtain a precursor solution.

[0068] (3) soaking the aluminum silicate fiber cloth substrate in the precursor solution and stirring for 1 hour to ensure that the aluminum silicate fiber cloth substrate completely absorbs potassium molybdate and thiourea molecules;

[0069] (4) 50 mL of the precursor solution and the aluminum silicate fiber cloth substrate were transferred into a 100 mL polytetrafluoroethylene-lined autoclave, the autoclave was sealed and hydrothermally treated at 160 °C for 8 h to obtain fibrous MoS2 / aluminum silicate fiber cloth.

[0070] (5) After sufficient cooling, the fibrous MoS2 / aluminum silicate fiber cloth was ultrasonically treated with water and ethanol, and then dried at 90°C for 0.5h to obtain the fibrous MoS2 / aluminum silicate fiber cloth.

[0071] (6) The photothermal evaporator was made by immersing the two ends of the fibrous MoS2 / aluminum silicate fiber cloth in two quartz pools (4 cm × 1 cm × 5 cm). The area of ​​the MoS2 / aluminum silicate fiber cloth exposed to sunlight was about 16 cm 2 , thickness 2mm, and encapsulated the two quartz cells with melamine foam to prevent heat exchange.

[0072] The aluminum silicate fiber cloth in Example 1 and the prepared fibrous MoS2 / aluminum silicate fiber cloth were respectively subjected to electron microscope scanning. The test images can be seen in Figure 2 .

[0073] The two quartz pools in the photothermal evaporator obtained in Example 1 were filled with water respectively, and were placed in the dark and under 1 equivalent of sunlight respectively, and the water evaporation in the two cases was tested. The test results can be seen in Figure 3 ,Depend on Figure 3 It can be seen that under the irradiation of sunlight, the photothermal evaporator of the present invention has good photothermal conversion characteristics and can quickly evaporate the water in the quartz pool.

[0074] The two quartz pools in the photothermal evaporator obtained in Example 1 were filled with waste liquid containing only mercury ions, and the mercury ion concentration of the waste liquid (including the original solution of tribute) before evaporation and the mercury ion concentration in the collected treated water were tested; the quartz pool filled with the waste liquid containing mercury ions was directly exposed to sunlight for direct evaporation, and the concentration of mercury ions in the condensed and evaporated water was tested. The test results are shown in Figure 4 (All were carried out under 1 equivalent sunlight.) Figure 4 It can be seen that the photothermal evaporator of the present invention can effectively remove mercury ions in waste liquid.

[0075] The two quartz cells in the photothermal evaporator obtained in Example 1 were filled with waste liquid containing only toluene (the toluene concentration in the original waste liquid was 10 4 mg / L), and tested the toluene concentration in the collected treated water; then the same method was used to test the removal of gasoline, cyclohexane, peanut oil and crude oil by the photothermal evaporator. Figure 5(All were carried out under 1 equivalent sunlight.) Figure 5 It can be seen that the photothermal evaporator of the present invention can effectively remove the insoluble oil fraction in the waste liquid.

[0076] The two quartz pools in the photothermal evaporator obtained in Example 1 were filled with waste liquid containing mercury ions and toluene, respectively, and the concentrations of mercury ions and toluene in the waste liquid before evaporation and the concentrations of mercury ions and toluene in the collected treated water were tested; the quartz pools filled with waste liquid containing mercury ions and toluene were directly exposed to sunlight for direct evaporation, and the concentrations of mercury ions and toluene in the condensed and evaporated water were tested. The test results are shown in Figure 6 (All were carried out under 1 equivalent sunlight.) Figure 6 It can be seen that the photothermal evaporator of the present invention can effectively remove mercury ions and insoluble oil fractions at the same time.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0078] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A fibrous MoS2 / inorganic fiber cloth, characterized in that: The invention comprises an inorganic fiber cloth substrate and molybdenum disulfide attached to the surface of the inorganic fiber cloth substrate.

2. The fibrous MoS2 / inorganic fiber cloth according to claim 1, characterized in that: The inorganic fiber cloth substrate includes aluminum silicate fiber cloth.

3. A method for preparing the fibrous MoS2 / inorganic fiber cloth according to claim 1 or 2, characterized in that: include: preparing a precursor solution, the precursor solution comprising a molybdenum-containing compound and a sulfur-containing compound; Soaking the inorganic fiber cloth substrate in the precursor solution to obtain a soaking solution; The soaking liquid is placed in a reactor for hydrothermal treatment to obtain the fibrous MoS2 / inorganic fiber cloth.

4. The method according to claim 3, characterized in that The molybdenum-containing compound includes at least one of hydrated ammonium molybdate, non-hydrated ammonium molybdate, hydrated potassium molybdate, non-hydrated potassium molybdate, hydrated sodium molybdate, and non-hydrated sodium molybdate; And / or, the sulfur-containing compound includes at least one of thiourea and thioacetamide.

5. The method according to claim 3 or 4, characterized in that: Based on the total mass of the precursor solution, the mass fraction of the molybdenum-containing compound may be 0.5% to 5% by mass, and / or the mass fraction of the sulfur-containing compound may be 1% to 10% by mass.

6. The method according to claim 3, characterized in that The inorganic fiber cloth substrate is immersed in the precursor solution for 0.5 to 5 hours.

7. The method according to claim 3, characterized in that The temperature of the hydrothermal treatment is 120-200° C., and the time is 5-20 hours.

8. The method according to claim 3, characterized in that Also includes: The fibrous MoS2 / inorganic fiber cloth is dried at a temperature of 60 to 110°C for a time of 0.2 to 2 hours.

9. A photothermal evaporator, characterized in that: include: The fibrous MoS2 / inorganic fiber cloth according to any one of claims 1 to 8; A wastewater pool, a portion of the fibrous MoS2 / inorganic fiber cloth is immersed in the wastewater pool, and the other portion is placed under light.

10. Use of the fibrous MoS2 / inorganic fiber cloth according to any one of claims 1 to 8 in wastewater treatment.

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