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CdIn2S4 nanodot hybrid TiO2 hollow sphere composite photocatalyst, preparation method and application thereof

A cdin2s4, hollow sphere technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limited wide application, high photo-generated electron-hole pair recombination efficiency, and improve separation efficiency. , Excellent light harvesting ability, mild reaction conditions

Inactive Publication Date: 2018-08-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CdIn 2 S 4 The photocatalytic efficiency is still affected by the high recombination efficiency of photogenerated electron-hole pairs, which limits its wide application.

Method used

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  • CdIn2S4 nanodot hybrid TiO2 hollow sphere composite photocatalyst, preparation method and application thereof
  • CdIn2S4 nanodot hybrid TiO2 hollow sphere composite photocatalyst, preparation method and application thereof
  • CdIn2S4 nanodot hybrid TiO2 hollow sphere composite photocatalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] (1) Weigh cadmium nitrate tetrahydrate, indium nitrate hydrate and L-cysteine ​​amine sequentially according to the molar ratio of 0.2:0.4:1.6 and add them to 10ml of deionized water, and stir until a transparent mixed solution;

[0025] (2) Weigh 0.01g of TiO 2 Add the hollow spheres to 10ml of absolute ethanol, and stir ultrasonically for a period of time to form a uniformly dispersed TiO 2 Hollow sphere suspension;

[0026] (3) TiO obtained in step (2) 2The hollow sphere suspension was added dropwise to the transparent solution prepared in step (1), the process was carried out under stirring, then continued to stir for 10 minutes, and then ultrasonically dispersed for 10 minutes, and then moved the uniformly dispersed mixed solution into the polytetrafluoroethylene-lined In a high-pressure reactor, react at 160°C for 18 hours. After the reaction is completed, cool to room temperature naturally, centrifuge the solid in the solution, wash it with ethanol and water th...

example 2

[0031] (1) Weigh cadmium nitrate tetrahydrate, indium nitrate hydrate and L-cysteine ​​amine sequentially according to the molar ratio of 0.4:0.8:3.2 and add them to 15ml of deionized water, and stir until a transparent mixed solution;

[0032] (2) Weigh 0.53g of TiO 2 Add the hollow spheres to 15ml of absolute ethanol, and stir ultrasonically for a period of time to form a uniformly dispersed TiO 2 Hollow sphere suspension;

[0033] (3) TiO obtained in step (2) 2 The hollow sphere suspension was added dropwise to the transparent solution prepared in step (1), the process was carried out under stirring, then continued to stir for 20 minutes, and then ultrasonically dispersed for 20 minutes, and then moved the uniformly dispersed mixed solution into the Teflon-lined In a high-pressure reactor, react at 180°C for 24 hours. After the reaction is completed, cool to room temperature naturally, centrifuge the solid in the solution, wash it with ethanol and water three times, and d...

example 3

[0038] (1) Weigh cadmium nitrate tetrahydrate, indium nitrate hydrate and L-cysteine ​​ammonium sequentially according to the molar ratio of 0.8:1.6:6.4 and add them to 20ml of deionized water, and stir until a transparent mixed solution;

[0039] (2) Weigh 1.54g of TiO 2 Add the hollow spheres to 20ml of absolute ethanol, and stir ultrasonically for a period of time until uniformly dispersed TiO 2 Hollow sphere suspension;

[0040] (3) TiO obtained in step (2) 2 The hollow sphere suspension was added dropwise to the transparent solution prepared in step (1), the process was carried out under stirring, then continued to stir for 30 minutes, and then ultrasonically dispersed for 30 minutes, and then moved the uniformly dispersed mixed solution into the Teflon-lined In a high-pressure reactor, react at 200 ° C for 28 hours. After the reaction is completed, cool to room temperature naturally, centrifuge the solid in the solution, wash it with ethanol and water three times, and ...

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Abstract

Belonging to the field of preparation of inorganic nano-composite materials and environmental treatment, the invention specifically discloses a preparation method of a CdIn2S4 nanodot hybrid TiO2 hollow sphere composite photocatalyst. The method adopts TiO2 hollow spheres, cadmium nitrate tetrahydrate, indium nitrate hydrate and L-cysteine as the raw materials, and employs hydrothermal process toprepare the CdIn2S4 nanodot hybrid TiO2 hollow sphere composite photocatalyst of different ratios. The CdIn2S4 nanodot hybrid TiO2 hollow sphere prepared by the method can be applied to degradation ofthe dye methyl orange in visible light. The preparation method has the advantages of environment-friendly raw materials, simple method, mild hybridization reaction conditions, short period, low costand the like. The CdIn2S4 nanodot hybrid TiO2 hollow sphere is a novel composite visible light catalyst, and the invention reports synthesis of the composite photocatalyst for the first time. The CdIn2S4 nanodot hybrid TiO2 hollow sphere shows excellent photocatalytic degradation activity, and has important application prospects in treatment of dye wastewater.

Description

technical field [0001] The invention belongs to the field of inorganic nanometer materials and relates to a CdIn 2 S 4 Nanodot hybrid TiO 2 Preparation method of hollow sphere composite photocatalyst and its application in the field of environmental treatment. Background technique [0002] With the continuous progress of society, the energy crisis and environmental pollution caused by the development of human beings have become urgent problems to be solved. As an efficient and environment-friendly technology, photocatalytic oxidation degradation technology based on semiconductor materials provides a new idea for the removal of organic pollutants and has broad application prospects; common semiconductor photocatalysts are mostly metal oxides and sulfide. Of which titanium dioxide (TiO 2 ), as an important semiconductor photocatalyst, has good stability, photostability, low toxicity and excellent photocatalytic oxidation ability, and its application in solar energy conver...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J35/00B01J35/08C02F1/30C02F1/72C02F101/30
CPCC02F1/30C02F1/725B01J27/04C02F2101/308B01J35/51B01J35/39
Inventor 蒋银花杨心砚彭志远景旋张文莉
Owner JIANGSU UNIV
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