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Synthesis method of novel visible-light photocatalyst indium sulfide

A technology of photocatalyst and synthesis method, applied in chemical instruments and methods, physical/chemical process catalyst, chemical/physical process, etc., can solve the problems of unstable visible light photocatalyst, photocorrosion of sulfide anode, low activity, etc. Good degradation effect, uniform size and large specific surface area

Inactive Publication Date: 2012-02-01
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In general, these doped photocatalysts still cannot have ideal absorption in the visible light region, or they are unstable and have low activity in the photocatalytic process.
[0003] On the other hand, people are committed to the development of new materials. Traditional visible light photocatalysts are either unstable under light, such as cadmium sulfide, cadmium selenide, etc., or have low activity under light, such as tungsten trioxide and ferric oxide.
Indium sulfide is a non-titanium dioxide-based, but more efficient visible light photocatalyst than titanium dioxide-based catalysts. It can efficiently utilize the energy of the solar spectrum and greatly improve the quantum efficiency. It has been reported that most sulfides are promising visible light photocatalysts. Catalysts, however, many sulfides undergo anodic photocorrosion under light and are unstable, but indium sulfide has high activity for bleaching organic dyes under visible light, and its properties are stable and can be recycled

Method used

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  • Synthesis method of novel visible-light photocatalyst indium sulfide
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  • Synthesis method of novel visible-light photocatalyst indium sulfide

Examples

Experimental program
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Effect test

Embodiment 1

[0018] (a) Weigh an appropriate amount of indium chloride tetrahydrate (InCl 3 4H 2 O) Dissolve in deionized water, add acetic acid to adjust its pH value to 1, then add thioacetamide (CH 2 CSNH 2 ) solution, the concentration of indium ions is 0.025mol / L, wherein the ratio of the amount of In and S substances is 1:4;

[0019] (b) Put the mixed solution obtained in step (a) into an oven to heat to make it react, adjust the temperature to 80° C., conduct a hydrothermal reaction for 6 hours, and cool at room temperature;

[0020] (c) suction filtration under reduced pressure, washing, and drying to obtain orange-red indium sulfide powder, the powder X-ray diffraction pattern of the product is shown in figure 1 .

[0021] (d) Weigh 0.10 g of indium sulfide and place it in 1×10 -5 mol / L (absorbance is about 1.0) methyl orange solution, the visible light photocatalytic degradation test was carried out.

Embodiment 2

[0023] (a) Weigh an appropriate amount of indium chloride tetrahydrate (InCl 3 4H 2 O) Dissolve in deionized water, add acetic acid to adjust its pH value to 2, then add thioacetamide (CH 2 CSNH 2 ) solution, the concentration of indium ions is 0.025mol / L, wherein the ratio of the amount of In and S substances is 1:4;

[0024] (b) Put the mixed solution obtained in step (a) into an oven to heat it to react, adjust the temperature to 80° C., conduct a hydrothermal reaction for 4 hours, and cool at room temperature;

[0025] (c) Suction filtration under reduced pressure, washing and drying to obtain orange-red indium sulfide powder.

[0026] (d) Weigh 0.10 g of indium sulfide and place it in 1×10 -5 mol / L (absorbance is about 1.0) methyl orange solution, the visible light photocatalytic degradation test was carried out.

Embodiment 3

[0028] (a) Weigh an appropriate amount of indium chloride tetrahydrate (InCl 3 4H 2 O) Dissolve in deionized water, add acetic acid to adjust its pH value to 3, then add thioacetamide (CH 2 CSNH 2 ) solution, the concentration of indium ions is 0.025mol / L, wherein the ratio of the amount of In and S substances is 1:6;

[0029] (b) Put the mixed solution obtained in step 1 into an oven to heat to make it react, adjust the temperature to 80°C, conduct hydrothermal reaction for 8 hours, and cool at room temperature;

[0030] (c) Suction filtration under reduced pressure, washing and drying to obtain orange-red indium sulfide powder.

[0031] (d) Weigh 0.10 g of indium sulfide and place it in 1×10 -5 mol / L (absorbance is about 1.0) methyl orange solution, the visible light photocatalytic degradation test was carried out.

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Abstract

The invention relates to a synthesis method of a novel visible-light photocatalyst indium sulfide, belonging to the technical field of preparation of photocatalysts. The method comprises the following steps: weighing indium chloride tetrahydrate, dissolving the indium chloride tetrahydrate in deionized water, adding acetic acid to regulate the pH value to 1-3, and adding thioacetamide solution, wherein the concentration of indium ions is 0.025 mol / L, and the In / S mol ratio is 1:4-1:10; heating the obtained mixed solution to constant temperature so as to carry out hydrothermal reaction for 4-8 hours while regulating the temperature to 80 DEG C, and cooling at room temperature; and carrying out vacuum filtration under reduced pressure, washing, and drying to obtain the orange indium sulfide powder. The indium sulfide prepared by the method provided by the invention is in a ball-flower shape, and has the advantages of large specific area and uniform size; and the indium sulfide powder is in a cubic structure. The indium sulfide can be used as a visible-light photocatalyst, and has good degradation effect on organic dyes (such as methyl orange).

Description

technical field [0001] The invention relates to a synthesis method of a novel visible light photocatalyst indium sulfide, which belongs to the technical field of photocatalyst preparation. Background technique [0002] Methyl orange is a well-known sulfonic acid azo dye indicator, which is widely used in dyeing, food, pulp, leather, printing, textile and so on. In these industries, methyl orange is a common water pollutant, and a lot of research work is dedicated to degrading methyl orange into harmless substances. Biodegradation processes are rarely used in textile wastewater because of the presence of toxic residual dye fillers, surfactants, and other harmful additives. Advanced photooxidation technology is imperative, and various photocatalysts can be used to treat wastewater. Photocatalysis is an alternative method that is different from the conventional ones and has been extensively studied. In recent years, organic pollutant water treatment, especially organic sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/10C02F1/30C02F1/58
CPCY02W10/37
Inventor 汪浩高志华刘晶冰朱满康严辉
Owner BEIJING UNIV OF TECH
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