Organic pollution purification capillary tube and preparation method thereof

Abstract

The invention relates to an organic pollution purification capillary tube and a preparation method thereof, and belongs to the field of water pollution purification materials. According to the method, the polyester fiber is used as a template material, the surface of the polyester fiber is carbonized, and then the polyester fiber is removed in the capillary shaping process, so that the one-dimensional linear capillary hollow pipe is formed. The organic pollution purification capillary tube is composed of samarium vanadate and has low stacking density. The organic pollution purification capillary tube not only can adsorb organic pollutants in water, but also can decompose the organic pollutants under an illumination condition, and can be stably used for purification treatment of the organic pollutants in wastewater for a long time.

Description

Technical Field

[0001] The invention belongs to the field of water pollution purification materials, and in particular relates to an organic pollution purification capillary and a preparation method thereof. Background Art

[0002] Industrial and domestic sewage contains a large amount of organic pollutants, some of which are extremely harmful to humans and the environment. Such sewage must be purified before it can be discharged into the natural environment.

[0003] Commonly used sewage treatment methods such as biochemical methods rely on the decomposition of organic pollutants by microorganisms to achieve the purpose of sewage purification, but some toxic pollutants in sewage are highly toxic to microorganisms, and traditional biochemical treatment methods are not suitable for sewage containing such special toxic pollutants. Such sewage can be treated by photocatalytic oxidation to remove organic pollutants in water, but the application of photocatalytic technology depends on the selection of photocatalytic materials, and highly active photocatalytic materials that are easy to separate from water are key elements. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention aims to provide an organic pollution purification capillary and a preparation method thereof. The capillary can be used to purify organic pollutants in the environment.

[0005] The invention discloses an organic pollution purification capillary tube, which is composed of samarium vanadate.

[0006] Furthermore, the organic pollution purification capillary is a one-dimensional linear capillary hollow tube; the inner diameter of the organic pollution purification capillary is 8 to 9 μm, the length is 8 cm, and the bulk density is 580 to 660 g / L.

[0007] A method for preparing the above-mentioned organic pollution purification capillary comprises the following process steps:

[0008] Step 1: Carbonization of polyester fiber surface

[0009] (1) 5 g of polyester fiber was placed in a vacuum furnace, and the pressure inside the furnace was evacuated to 0.1 atmosphere, and nitrogen was then introduced into the furnace until the pressure inside the furnace was 0.6 atmosphere;

[0010] (2) raising the temperature in the vacuum furnace to 230-260° C. and maintaining the temperature for 1 hour to obtain a surface carbonized polyester fiber;

[0011] Step 2: Preparation of samarium vanadate precursor

[0012] (1) Heat 220 mL of ethanol to 60° C., add 4.5 to 5.2 g of emulsifier Tween 60 and 7.8 to 9.1 g of sodium metavanadate, and stir to form solution A;

[0013] (2) Add 5.6-6.0 g of samarium nitrate, 3.3-3.7 g of sodium bicarbonate, and 2.5-2.8 g of dodecyltrimethylammonium chloride to 100 mL of pure water and stir to form solution B;

[0014] (3) adding solution B to solution A and stirring to form a samarium vanadate precursor;

[0015] Step 3: Capillary shaping

[0016] (1) immersing the surface carbonized polyester fiber prepared in step 1 into the samarium vanadate precursor prepared in step 2, and ultrasonically treating the polyester fiber for 15 minutes to uniformly disperse the polyester fiber in the samarium vanadate precursor;

[0017] (2) heating the mixture to 50° C. and keeping the temperature for 30 min, taking out the polyester fiber and washing it with pure water;

[0018] (3) The cleaned solid was dried at 120°C for 10 hours, and then placed in a programmable box-type electric furnace, the temperature was first raised to 280-290°C and calcined for 2 hours, and then the temperature was raised to 460-480°C and calcined for 3 hours to obtain an organic pollution purification capillary.

[0019] Furthermore, the main component of the polyester fiber in step 1 is polyethylene terephthalate, and its mass percentage is 95%; the outer diameter of the polyester fiber is 12 μm and the length is 8 cm.

[0020] A method for preparing an organic pollution purification capillary has the following advantages compared with the prior art:

[0021] Polyester fiber is used as a template material, and the surface of the polyester fiber is first carbonized. The surface carbonized polyester fiber is conducive to the subsequent shaping of the samarium vanadate capillary. The polyester fiber is removed through a precisely controlled calcination process in the capillary shaping step to form a one-dimensional linear capillary hollow tube. The organic pollution purification capillary is composed of samarium vanadate, has a low bulk density, and can form a suspension in water by slight stirring. The organic pollution purification capillary can not only adsorb organic pollutants in water, but also decompose the adsorbed organic pollutants under light conditions, thereby avoiding the decrease in treatment capacity due to adsorption saturation, and can be used for the purification of organic pollutants in wastewater in a long-term and stable manner. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The reagents or instruments used without indicating the manufacturer are all conventional commercial products.

[0023] Example 1

[0024] A method for preparing an organic pollution purification capillary comprises the following process steps:

[0025] Step 1: Carbonization of polyester fiber surface

[0026] (1) 5 g of polyester fiber was placed in a vacuum furnace, and the pressure inside the furnace was evacuated to 0.1 atmosphere, and nitrogen was then introduced into the furnace until the pressure inside the furnace was 0.6 atmosphere;

[0027] (2) The temperature in the vacuum furnace is raised to 230° C. and maintained at that temperature for 1 hour to obtain a surface carbonized polyester fiber.

[0028] Step 2: Preparation of samarium vanadate precursor

[0029] (1) Heat 220 mL of ethanol to 60° C., add 4.5 g of emulsifier Tween 60 and 7.8 g of sodium metavanadate, and stir to form solution A;

[0030] (2) Add 5.6 g of samarium nitrate, 3.3 g of sodium bicarbonate, and 2.5 g of dodecyltrimethylammonium chloride to 100 mL of pure water and stir to form solution B;

[0031] (3) Solution B is added to solution A and stirred to form a samarium vanadate precursor.

[0032] Step 3: Capillary shaping

[0033] (1) immersing the surface carbonized polyester fiber prepared in step 1 into the samarium vanadate precursor prepared in step 2, and ultrasonically treating the polyester fiber for 15 minutes to uniformly disperse the polyester fiber in the samarium vanadate precursor;

[0034] (2) heating the mixture to 50° C. and keeping the temperature for 30 min, taking out the polyester fiber and washing it with pure water;

[0035] (3) The cleaned solid was dried at 120°C for 10 h, and then placed in a programmable box-type electric furnace, the temperature was first raised to 280°C and calcined for 2 h, and then the temperature was raised to 460°C and calcined for 3 h, to obtain an organic pollution purification capillary.

[0036] The organic pollution purification capillary prepared in this embodiment is composed of samarium vanadate and is a one-dimensional linear capillary hollow tube with an inner diameter of 8 μm, a length of 8 cm, and a bulk density of 580 g / L.

[0037] Example 2

[0038] A method for preparing an organic pollution purification capillary comprises the following process steps:

[0039] Step 1: Carbonization of polyester fiber surface

[0040] (1) 5 g of polyester fiber was placed in a vacuum furnace, and the pressure inside the furnace was evacuated to 0.1 atmosphere, and nitrogen was then introduced into the furnace until the pressure inside the furnace was 0.6 atmosphere;

[0041] (2) The temperature in the vacuum furnace is raised to 240°C and maintained at that temperature for 1 hour to obtain surface carbonized polyester fibers.

[0042] Step 2: Preparation of samarium vanadate precursor

[0043] (1) Heat 220 mL of ethanol to 60° C., add 4.6 g of emulsifier Tween 60 and 8.3 g of sodium metavanadate, and stir to form solution A;

[0044] (2) Add 5.7 g of samarium nitrate, 3.4 g of sodium bicarbonate, and 2.6 g of dodecyltrimethylammonium chloride to 100 mL of pure water and stir to form solution B;

[0045] (3) Solution B is added to solution A and stirred to form a samarium vanadate precursor.

[0046] Step 3: Capillary shaping

[0047] (1) immersing the surface carbonized polyester fiber prepared in step 1 into the samarium vanadate precursor prepared in step 2, and ultrasonically treating the polyester fiber for 15 minutes to uniformly disperse the polyester fiber in the samarium vanadate precursor;

[0048] (2) heating the mixture to 50° C. and keeping the temperature for 30 min, taking out the polyester fiber and washing it with pure water;

[0049] (3) The cleaned solid was dried at 120°C for 10 h, and then placed in a programmable box-type electric furnace, the temperature was first raised to 280°C and calcined for 2 h, and then the temperature was raised to 460°C and calcined for 3 h, to obtain an organic pollution purification capillary.

[0050] The organic pollution purification capillary is composed of samarium vanadate and is a one-dimensional linear capillary hollow tube with an inner diameter of 8 μm, a length of 8 cm, and a bulk density of 590 g / L.

[0051] Example 3

[0052] A method for preparing an organic pollution purification capillary comprises the following process steps:

[0053] Step 1: Carbonization of polyester fiber surface

[0054] (1) 5 g of polyester fiber was placed in a vacuum furnace, and the pressure inside the furnace was evacuated to 0.1 atmosphere, and nitrogen was then introduced into the furnace until the pressure inside the furnace was 0.6 atmosphere;

[0055] (2) The temperature in the vacuum furnace is raised to 250°C and maintained for 1 hour to obtain surface carbonized polyester fibers.

[0056] Step 2: Preparation of samarium vanadate precursor

[0057] (1) Heat 220 mL of ethanol to 60° C., add 4.8 g of emulsifier Tween 60 and 8.6 g of sodium metavanadate, and stir to form solution A;

[0058] (2) Add 5.8 g of samarium nitrate, 3.5 g of sodium bicarbonate, and 2.7 g of dodecyltrimethylammonium chloride to 100 mL of pure water and stir to form solution B;

[0059] (3) Solution B is added to solution A and stirred to form a samarium vanadate precursor.

[0060] Step 3: Capillary shaping

[0061] (1) immersing the surface carbonized polyester fiber prepared in step 1 into the samarium vanadate precursor prepared in step 2, and ultrasonically treating the polyester fiber for 15 minutes to uniformly disperse the polyester fiber in the samarium vanadate precursor;

[0062] (2) heating the mixture to 50° C. and keeping the temperature for 30 min, taking out the polyester fiber and washing it with pure water;

[0063] (3) The cleaned solid was dried at 120°C for 10 h, and then placed in a programmable box-type electric furnace, the temperature was first raised to 290°C and calcined for 2 h, and then the temperature was raised to 470°C and calcined for 3 h, to obtain an organic pollution purification capillary.

[0064] The organic pollution purification capillary is composed of samarium vanadate and is a one-dimensional linear capillary hollow tube with an inner diameter of 9 μm, a length of 8 cm, and a bulk density of 620 g / L.

[0065] Example 4

[0066] A method for preparing an organic pollution purification capillary comprises the following process steps:

[0067] Step 1: Carbonization of polyester fiber surface

[0068] (1) 5 g of polyester fiber was placed in a vacuum furnace, and the pressure inside the furnace was evacuated to 0.1 atmosphere, and nitrogen was then introduced into the furnace until the pressure inside the furnace was 0.6 atmosphere;

[0069] (2) The temperature in the vacuum furnace is raised to 260°C and maintained for 1 hour to obtain surface carbonized polyester fibers.

[0070] Step 2: Preparation of samarium vanadate precursor

[0071] (1) Heat 220 mL of ethanol to 60° C., add 5.2 g of emulsifier Tween 60 and 9.1 g of sodium metavanadate, and stir to form solution A;

[0072] (2) Add 6.0 g of samarium nitrate, 3.7 g of sodium bicarbonate, and 2.8 g of dodecyltrimethylammonium chloride to 100 mL of pure water and stir to form solution B;

[0073] (3) Solution B is added to solution A and stirred to form a samarium vanadate precursor.

[0074] Step 3: Capillary shaping

[0075] (1) immersing the surface carbonized polyester fiber prepared in step 1 into the samarium vanadate precursor prepared in step 2, and ultrasonically treating the polyester fiber for 15 minutes to uniformly disperse the polyester fiber in the samarium vanadate precursor;

[0076] (2) heating the mixture to 50° C. and keeping the temperature for 30 min, taking out the polyester fiber and washing it with pure water;

[0077] (3) The cleaned solid was dried at 120°C for 10 h, and then placed in a programmable box-type electric furnace. The temperature was first raised to 290°C and calcined for 2 h, and then the temperature was raised to 480°C and calcined for 3 h to obtain an organic pollution purification capillary.

[0078] The organic pollution purification capillary is composed of samarium vanadate and is a one-dimensional linear capillary hollow tube with an inner diameter of 9 μm, a length of 8 cm, and a bulk density of 660 g / L.

[0079] 0.5 g of organic pollution purification capillary was added to 300 mL of 20 mg / L reactive red 1 dye solution, and the solution was placed under a 20 W ultraviolet germicidal lamp under stirring. After 35 minutes, the concentration of the reactive red 1 dye solution was measured and the degradation rate of the reactive red 1 dye was calculated. The results are shown in Table 1.

[0080]

[0081] Table 1

[0082] The results show that the organic pollution purification capillaries prepared in Examples 1-4 have strong activity in degrading organic matter and can quickly and completely degrade organic pollutants under light.

Claims

1. An organic pollution purification capillary, characterized in that: The organic pollution purification capillary is composed of samarium vanadate.

2. The organic pollution purification capillary according to claim 1, characterized in that: The organic pollution purification capillary is a one-dimensional linear capillary hollow tube; the inner diameter of the organic pollution purification capillary is 8-9 μm, the length is 8 cm, and the bulk density is 580-660 g / L.

3. A method for preparing an organic pollution purification capillary according to any one of claims 1 to 2, characterized in that: The process steps include: Step 1: Carbonization of polyester fiber surface (1) 5 g of polyester fiber was placed in a vacuum furnace, and the pressure inside the furnace was evacuated to 0.1 atmosphere, and nitrogen was then introduced into the furnace until the pressure inside the furnace was 0.6 atmosphere; (2) raising the temperature in the vacuum furnace to 230-260° C. and maintaining the temperature for 1 hour to obtain a surface carbonized polyester fiber; Step 2: Preparation of samarium vanadate precursor (1) Heat 220 mL of ethanol to 60° C., add 4.5 to 5.2 g of emulsifier Tween 60 and 7.8 to 9.1 g of sodium metavanadate, and stir to form solution A; (2) Add 5.6-6.0 g of samarium nitrate, 3.3-3.7 g of sodium bicarbonate, and 2.5-2.8 g of dodecyltrimethylammonium chloride to 100 mL of pure water and stir to form solution B; (3) adding solution B to solution A and stirring to form a samarium vanadate precursor; Step 3: Capillary shaping (1) immersing the surface carbonized polyester fiber prepared in step 1 into the samarium vanadate precursor prepared in step 2, and ultrasonically treating the polyester fiber for 15 minutes to uniformly disperse the polyester fiber in the samarium vanadate precursor; (2) heating the mixture to 50° C. and keeping the temperature for 30 min, taking out the polyester fiber and washing it with pure water; (3) The cleaned solid was dried at 120°C for 10 hours, and then placed in a programmable box-type electric furnace, the temperature was first raised to 280-290°C and calcined for 2 hours, and then the temperature was raised to 460-480°C and calcined for 3 hours to obtain an organic pollution purification capillary.

4. The method for preparing an organic pollution purification capillary according to claim 3, characterized in that: The main component of the polyester fiber in step 1 is polyethylene terephthalate, and its mass percentage is 95%; the outer diameter of the polyester fiber is 12 μm and the length is 8 cm.

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