Organic pollution purification capillary and preparation method thereof

Abstract

The present invention relates to an organic pollution purification capillary tube and a preparation method thereof, belonging to the field of water pollution purification materials. The present invention uses polyester fiber as a template material, first carbonizing the polyester fiber surface, and then removing the polyester fiber during the capillary shaping process to form a one-dimensional linear capillary hollow tube. The organic pollution purification capillary tube of the present invention is composed of samarium vanadate and has a low bulk density. The organic pollution purification capillary tube can not only adsorb organic pollutants in water but also decompose organic pollutants under light conditions, and can be used for the long-term and stable purification of organic pollutants in wastewater.

Description

Technical Field

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

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

[0003] Common wastewater treatment methods, such as biochemical methods, rely on microbial decomposition of organic pollutants to purify wastewater. However, some toxic pollutants in wastewater are highly toxic to microorganisms, making traditional biochemical treatment methods unsuitable for wastewater containing these particular toxic pollutants. Photocatalytic oxidation can be used to remove organic pollutants from such wastewater, but the application of photocatalytic technology depends on the selection of photocatalytic materials. Highly active photocatalytic materials that are easily separated from water are key factors. 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. Such a capillary can be used to purify organic pollutants in the environment.

[0005] An organic pollution purification capillary is composed of samarium vanadate.

[0006] Furthermore, the organic pollution purification capillary is a one-dimensional linear capillary hollow tube; the organic pollution purification capillary has an inner diameter of 8 to 9 μm, a length of 8 cm, and a bulk density of 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) Place 5 g of polyester fiber in a vacuum furnace, evacuate the furnace to a pressure of 0.1 atmosphere, and then introduce nitrogen into the furnace to a pressure of 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 surface carbonized polyester fibers;

[0011] Step 2: Preparation of samarium vanadate precursor

[0012] (1) Heat 220 mL of ethanol to 60°C, add 4.5-5.2 g of emulsifier Tween 60 and 7.8-9.1 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 it warm for 30 minutes, taking out the polyester fiber and washing it with pure water;

[0018] (3) The cleaned solid was dried at 120°C for 10 h, then placed in a programmable box-type electric furnace, first raised to 280-290°C and calcined for 2 h, then raised to 460-480°C and calcined for 3 h 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] Using polyester fiber as a template material, 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, thereby forming 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 decline 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 solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the examples. It should be understood that the specific examples 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) Place 5 g of polyester fiber in a vacuum furnace, evacuate the furnace to a pressure of 0.1 atmosphere, and then introduce nitrogen into the furnace to a pressure of 0.6 atmosphere;

[0027] (2) The temperature in the vacuum furnace was raised to 230°C and kept at this temperature for 1 hour to obtain surface carbonized polyester fibers.

[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 it warm for 30 minutes, taking out the polyester fiber and washing it with pure water;

[0035] (3) The cleaned solid was dried at 120°C for 10 h, 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) Place 5 g of polyester fiber in a vacuum furnace, evacuate the furnace to a pressure of 0.1 atmosphere, and then introduce nitrogen into the furnace to a pressure of 0.6 atmosphere;

[0041] (2) The temperature in the vacuum furnace was raised to 240°C and kept at this 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 it warm for 30 minutes, taking out the polyester fiber and washing it with pure water;

[0049] (3) The cleaned solid was dried at 120°C for 10 h, 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) Place 5 g of polyester fiber in a vacuum furnace, evacuate the furnace to a pressure of 0.1 atmosphere, and then introduce nitrogen into the furnace to a pressure of 0.6 atmosphere;

[0055] (2) Raise the temperature in the vacuum furnace to 250°C and keep it warm 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 it warm for 30 minutes, taking out the polyester fiber and washing it with pure water;

[0063] (3) The cleaned solid was dried at 120°C for 10 h, then placed in a programmable box-type electric furnace, and 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) Place 5 g of polyester fiber in a vacuum furnace, evacuate the furnace to a pressure of 0.1 atmosphere, and then introduce nitrogen into the furnace to a pressure of 0.6 atmosphere;

[0069] (2) The temperature in the vacuum furnace was raised to 260°C and kept at this temperature 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 it warm for 30 minutes, taking out the polyester fiber and washing it with pure water;

[0077] (3) The cleaned solid was dried at 120°C for 10 h, then placed in a programmable box-type electric furnace, and 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 contamination purification capillary was added to 300 mL of a 20 mg / L Reactive Red 1 dye solution. The solution was then placed under a 20 W UV germicidal lamp while stirring. After 35 minutes, a sample was taken to determine the concentration of the Reactive Red 1 dye solution and calculate the degradation rate of the Reactive Red 1 dye. 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. A method for preparing an organic pollution purification capillary, characterized in that: The process steps include: Step 1: Carbonization of polyester fiber surface (1) Place 5 g of polyester fiber in a vacuum furnace, evacuate the furnace to a pressure of 0.1 atmosphere, and then introduce nitrogen gas into the furnace to a pressure of 0.6 atmosphere; (2) Raising the temperature in the vacuum furnace to 230-260°C and maintaining the temperature for 1 hour to obtain surface carbonized polyester fibers; Step 2: Preparation of samarium vanadate precursor (1) Heat 220 mL of ethanol to 60°C, add 4.5-5.2 g of emulsifier Tween 60 and 7.8-9.1 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 in 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) Heat the mixture to 50°C and keep it warm for 30 minutes. Take out the polyester fiber and wash it with pure water. (3) The cleaned polyester fiber was dried at 120 °C for 10 h, and then placed in a programmable box-type electric furnace. The temperature was first raised to 280-290 °C and calcined for 2 h, and then the temperature was raised to 460-480 °C and calcined for 3 h to obtain an organic pollution purification capillary.

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

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

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