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Core-shell TiO2/ZnIn2S4 composite photocatalyst and preparation method and application thereof

A technology of znin2s4 and composite light, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of low photocatalytic quantum efficiency, achieve high photocatalytic activity, wide visible light response range, and low cost cheap effect

Active Publication Date: 2013-12-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a photocatalyst ZnIn 2 S 4 In the application, there is also the problem of low photocatalytic quantum efficiency

Method used

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  • Core-shell TiO2/ZnIn2S4 composite photocatalyst and preparation method and application thereof
  • Core-shell TiO2/ZnIn2S4 composite photocatalyst and preparation method and application thereof
  • Core-shell TiO2/ZnIn2S4 composite photocatalyst and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0028] A Visible Light Responsive Core-Shell TiO 2 / ZnIn 2 S 4 The preparation method of composite photocatalyst comprises the following steps:

[0029] (1) 20mg TiO 2 Ultrasonic dispersion in 30ml ethanol solvent for 10 minutes, the frequency of ultrasonic treatment is 40KHz, and the power is 50W;

[0030] (2) 2mmol zinc chloride and 4mmol indium nitrate are stirred and dissolved in 30ml ethanol solvent;

[0031] (3) Mix the suspension prepared in step (1) with the solution prepared in step (2), add 12 mmol thioacetamide and stir at a speed of 500 r / min for 20 minutes;

[0032] (4) Transfer the reaction system of step (3) to an autoclave, and react at 160° C. for 6 hours;

[0033] (5) Pour the product of step (4) into a vacuum filtration device for suction filtration, wash with deionized water, dry at 60°C for 6 hours, and obtain core-shell TiO after grinding 2 / ZnIn 2 S 4 composite photocatalyst.

[0034] figure 1 It is TiO in embodiment 1 2 and prepared ZnIn 2 S...

Embodiment 2

[0036] A Visible Light Responsive Core-Shell TiO 2 / ZnIn 2 S 4 The preparation method of composite photocatalyst comprises the following steps:

[0037] (1) 40mg TiO 2 Ultrasonic dispersion in 30ml ethanol solvent for 12 minutes; the frequency of ultrasonic treatment is 40KHz, and the power is 50W;

[0038] (2) 2mmol zinc chloride and 4mmol indium nitrate are stirred and dissolved in 30ml ethanol solvent;

[0039] (3) Mix the suspension prepared in step (1) with the solution prepared in step (2), add 12 mmol thioacetamide and stir at a speed of 500 r / min for 30 minutes;

[0040] (4) Transfer the reaction system of step (3) to an autoclave, and react at 180°C for 8 hours;

[0041] (5) Pour the product of step (4) into a vacuum filtration device for suction filtration, wash with deionized water, dry at 70°C for 5 hours, and grind to obtain core-shell TiO 2 / ZnIn 2 S 4 composite photocatalyst.

[0042] TiO in this embodiment 2 / ZnIn 2 S 4 X-ray diffraction pattern, vi...

Embodiment 3

[0044] A Visible Light Responsive Core-Shell TiO 2 / ZnIn 2 S 4 The preparation method of composite photocatalyst comprises the following steps:

[0045] (1) 80mg TiO 2 Ultrasonic dispersion in 30ml ethanol solvent for 15 minutes; the frequency of ultrasonic treatment is 45KHz, and the power is 75W;

[0046] (2) 2mmol zinc chloride and 4mmol indium nitrate are stirred and dissolved in 30ml ethanol solvent;

[0047] (3) Mix the suspension prepared in step (1) with the solution prepared in step (2), add 12 mmol thioacetamide and stir for 40 minutes at a speed of 500 r / min;

[0048] (4) Transfer the reaction system of step (3) to an autoclave, and react at 200° C. for 12 hours;

[0049] (5) Pour the product of step (4) into a vacuum filtration device for suction filtration, wash with deionized water, dry at 80°C for 4 hours, and grind to obtain core-shell TiO 2 / ZnIn 2 S 4 composite photocatalyst.

[0050] TiO in this embodiment 2 / ZnIn 2 S 4 X-ray diffraction pattern,...

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Abstract

The invention discloses a preparation method and an application of a core-shell TiO2 / ZnIn2S4 composite photocatalyst. The preparation method comprises the following steps: performing ultrasonic dispersion on TiO2 in an ethanol solvent; adding zinc chloride and indium nitrate into the ethanol solvent, and stirring to dissolve; mixing the two systems, and adding thioacetamide; transferring the mixed system into a high pressure kettle to react; performing vacuum filtration, washing, drying and grinding on a product after the reaction is finished to obtain the core-shell TiO2 / ZnIn2S4 composite photocatalyst. According to the method, the core-shell TiO2 / ZnIn2S4 composite photocatalyst is prepared in one step by adopting a solvothermal synthesis method, the catalyst is wide in visible light response range and high in photocatalysis activity, is applicable to organic dye wastewater degradation, and can be used for degrading methylene blue-containing wastewater in the field of solar energy transformation and utilization and environment management.

Description

technical field [0001] The present invention relates to a kind of photocatalyst, relate in particular to a kind of core-shell type TiO 2 / ZnIn 2 S 4 Composite photocatalyst and its preparation method and application; it belongs to the technical field of new structured photocatalytic materials and is used for degrading organic dye wastewater. Background technique [0002] With the emergence of problems such as global energy shortage and environmental pollution, the development and utilization of new energy sources has become a topic of great concern in today's era. Due to its inexhaustible, clean, non-polluting, and renewable advantages, solar energy has become a hot topic for scholars to use semiconductor photocatalysts to convert light energy into electrical energy and chemical energy. [0003] Zn 2 S 4 It is a very important semiconductor material with visible light response performance, and its forbidden band width is only about 2.3eV, which also makes it able to abs...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/02C02F1/30
CPCY02W10/37
Inventor 袁文辉夏自龙李莉
Owner SOUTH CHINA UNIV OF TECH
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