Preparation method for synthesizing N-TiO2@WSe2 photocatalyst through sol-gel method and application of N-TiO2@WSe2 photocatalyst

A technology of tungsten diselenide and titanium dioxide, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. The method is simple and the effect of improving the dispersibility

Inactive Publication Date: 2013-11-27
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to TiO 2 (Anatase) has a band gap of 3.2eV, and needs to absorb ultraviolet light below 387nm to be excited to show catalytic activity. However, ultraviolet light accounts for less than 5% of s...

Method used

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  • Preparation method for synthesizing N-TiO2@WSe2 photocatalyst through sol-gel method and application of N-TiO2@WSe2 photocatalyst
  • Preparation method for synthesizing N-TiO2@WSe2 photocatalyst through sol-gel method and application of N-TiO2@WSe2 photocatalyst
  • Preparation method for synthesizing N-TiO2@WSe2 photocatalyst through sol-gel method and application of N-TiO2@WSe2 photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] (1) Solution A: Add 9ml of n-butyl titanate and 27ml of absolute ethanol into a 250ml three-necked flask, place it in a water bath at 40°C, and stir vigorously for 15 minutes;

[0063] (2) Prepare thiourea solution according to the molar ratio of N and Ti being 1:1 respectively, and dissolve 2g of thiourea in 10ml of ethanol;

[0064] (3) Add the prepared thiourea solution drop by drop into solution A under vigorous stirring, and stir at a constant speed for 10 minutes;

[0065] (4) Load 7mmolTiO per 1g of tungsten diselenide 2 Weigh 2.5g of tungsten diselenide, add it into solution A and stir evenly;

[0066] (5) Solution B: Add 36ml of absolute ethanol and 2ml of deionized water into a 50ml volumetric flask, drop in HCl to make the solution acidic, and mix the solution evenly;

[0067] (6) Add solution B into the above mixed solution at a rate of 80 drops / min, and keep stirring at a constant speed for 20 minutes to obtain a black sol;

[0068] (7) Put the black s...

Embodiment 2

[0070] Prepare solution A and solution B according to the method in embodiment 1, according to every 1g of tungsten diselenide loading 9mmolTiO 2 Weigh 4g of tungsten diselenide, add it into solution A and stir evenly. Other experimental methods are the same as in Example 1.

Embodiment 3

[0072] Prepare solution A and solution B according to the method in embodiment 1, according to every 1g tungsten diselenide loading 13mmolTiO 2 Weigh 6g of tungsten diselenide, add it into solution A and stir evenly. Other experimental methods are the same as in Example 1.

[0073] The comparison of the above three embodiments finds that by comparing the scanning electron microscope images, when adding 9mmolTiO2 per 1g of tungsten diselenide load 2 Weigh 4g of tungsten diselenide and add it into solution A, and the obtained N-TiO 2 WS 2 The photocatalyst has the most uniform morphology.

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Abstract

The invention belongs to the technical field of environmental-friendly inorganic nano materials and relates to a preparation method for synthesizing a N-TiO2@WSe2 photocatalyst through a sol-gel method and application of the N-TiO2@WSe2 photocatalyst. The preparation method comprises the following steps: preparing a titanium ethanol solution; dropwise adding a thiocarbamide ethanol solution; adding WSe2 and stirring uniformly; dropwise adding acidic ethanol water to obtain sol; aging, calcining at high temperature and grinding to obtain the N-TiO2@WSe2 photocatalyst. In the N-TiO2@WSe2 photocatalyst prepared by the method, N-TiO2 particles of about 50 nm are uniformly distributed on the surface of WSe2, so that the N-TiO2@WSe2 photocatalyst can be used for photodegradation of wastewater containing antibiotics. The dispersity of N-TiO2 is improved, the photocatalytic activity of N-TiO2@WSe2 is enhanced, and tetracycline degradation validates that the photocatalytic activity is 69.7% higher than that of unadulterated TiO2. The preparation method is simple, low in cost and high in controllability, the yield of products is high and environmental protection is achieved.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly inorganic nanomaterials, and relates to the synthesis of nitrogen-doped titanium dioxide by a sol-gel method and loading it on the surface of tungsten diselenide (N-TiO 2 WS 2 ) Preparation method of photocatalyst and its application. Background technique [0002] Wastewater containing antibiotics is a high-concentration organic wastewater with high chroma, complex composition, difficult to biodegrade and many toxic substances. The pollutants are mainly fermentation residual nutrients, including fermentation metabolites, residual defoamers, coagulants, Emulsions and residual antibiotics and their degradation products, as well as acids, alkalis, organic solvents and other chemical raw materials, have complex components, variable content, and poor biodegradability. At present, most antibiotic wastewater treatment uses conventional deep well aeration or anaerobic fermentation and other...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30
CPCY02W10/37
Inventor 刘春波丛尧孙赫一任傲
Owner JIANGSU UNIV
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