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Preparation method and application of a composite photocatalyst for growing znin2s4 on the surface of tio2 hollow spheres

A technology of surface growth and znin2s4, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of no reports, etc., and achieve convenient operation, improved visible light catalytic activity, and strong visible light response ability Effect

Active Publication Date: 2018-11-06
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After verification, there are already teams that have integrated ZnIn 2 S 4 and TiO 2 For compounding [Wen Hui Yuan; Zi Long Xia; Li Li, Synthesis and photocatalytic properties of core–shell TiO 2 @ZnIn 2 S 4 photocatalyst, Chinese Chemical Letters, 24(2013)984–986], however, there is no 2 Hollow sphere and ZnIn 2 S 4 A report of the complex, so ZnIn 2 S 4 / TiO 2 Nanohollow sphere composite is a new type of photocatalyst

Method used

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  • Preparation method and application of a composite photocatalyst for growing znin2s4 on the surface of tio2 hollow spheres
  • Preparation method and application of a composite photocatalyst for growing znin2s4 on the surface of tio2 hollow spheres
  • Preparation method and application of a composite photocatalyst for growing znin2s4 on the surface of tio2 hollow spheres

Examples

Experimental program
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Effect test

example 1

[0027] (1) Weigh 0.05g TiO 2 Hollow sphere, TiO 2 The diameter of the hollow sphere is 200-400nm. Measure 20mL of twice distilled water in a beaker, sonicate for 10min, and then stir for 2h to obtain TiO 2 Hollow sphere dispersion.

[0028] (2) Weigh 0.052g zinc nitrate, 0.115g indium nitrate, 0.069g thioacetamide (TAA) and 0.045g cetyltrimethylammonium bromide (CTAB) in sequence and add them to step (1) to prepare TiO 2 hollow sphere dispersion; then the suspension was stirred for 2 hours; then the suspension was transferred to a reaction kettle for reaction; the reaction temperature was 160°C, and the reaction time was 6 hours. After the reaction, after cooling to room temperature, the obtained product was washed several times with deionized water and absolute ethanol, and dried in vacuum to obtain TiO 2 Growth of ZnIn on the surface of hollow spheres 2 S 4 Composite photocatalyst, where ZnIn 2 S 4 The content of the composite photocatalyst is 45.8%.

[0029] With ...

example 2

[0032] (1) Weigh 0.1g TiO 2 Hollow sphere, TiO 2 The diameter of the hollow sphere is 200-400nm. Measure 30mL of twice distilled water in a beaker, sonicate for 5min, and then stir for 2h to obtain TiO 2 Hollow sphere dispersion.

[0033] (2) Weigh successively 0.103g of zinc nitrate, 0.224g of indium nitrate, 0.135g of thioacetamide (TAA) and 0.090g of cetyltrimethylammonium bromide (CTAB) into step (1) to obtain TiO 2 hollow sphere dispersion; then the suspension was stirred for 2 hours; then the suspension was transferred to a reaction kettle for reaction; the reaction temperature was 160°C, and the reaction time was 7 hours. After the reaction, after cooling to room temperature, the obtained product was washed several times with deionized water and absolute ethanol, and dried in vacuum to obtain TiO 2 Growth of ZnIn on the surface of hollow spheres 2 S 4 Composite photocatalyst, where ZnIn 2 S 4 The content of the composite photocatalyst is 55.9%.

[0034] The ph...

example 3

[0037] (1) Weigh 0.30g TiO 2 Hollow sphere, TiO 2 The diameter of the hollow sphere is 200-400nm. Measure 80mL of twice distilled water in a beaker, sonicate for 15min, and then stir for 3h to obtain TiO 2 Hollow sphere dispersion.

[0038] (2) Sequentially weigh 0.034g zinc nitrate, 0.076g indium nitrate, 0.045g thioacetamide (TAA) and 0.030g cetyltrimethylammonium bromide (CTAB) and add them to step (1) to prepare TiO 2 hollow sphere dispersion; then the suspension was stirred for 2 hours; then the suspension was transferred to a reaction kettle for reaction; the reaction temperature was 180°C, and the reaction time was 8 hours. After the reaction, after cooling to room temperature, the obtained product was washed several times with deionized water and absolute ethanol, and dried in vacuum to obtain TiO 2 Growth of ZnIn on the surface of hollow spheres 2 S 4 Composite photocatalyst, where ZnIn 2 S 4 The content of the composite photocatalyst is 12.4%.

[0039] Visi...

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Abstract

The invention discloses a preparation method of a new type of visible light-responsive composite photocatalyst with ZnIn2S4 grown on the surface of TiO2 hollow spheres, which can be applied to the treatment of water pollution. The preparation steps are as follows: the TiO2 hollow spheres are ultrasonically dispersed in water, and then the ZnIn2S4 / TiO2 nanocomposite hollow sphere photocatalyst is prepared by an in-situ hydrothermal method. The ZnIn2S4 / TiO2 composite hollow sphere photocatalyst prepared by the invention can be used to catalytically degrade tetracycline hydrochloride, levofloxacin and methyl orange under visible light. The resulting ZnIn2S4 / TiO2 nanocomposite hollow sphere photocatalyst can capture more visible light and has a matching band gap structure, which can improve the separation efficiency of photogenerated electrons and holes. Good interface contact promotes the transmission of photoelectrons and significantly improves the performance of the catalyst. Visible light catalytic activity.

Description

technical field [0001] The invention relates to a preparation method of a nanocomposite material and its application in the field of water pollution control, in particular to ZnIn 2 S 4 / TiO 2 A preparation method of nanocomposite hollow sphere photocatalyst. Background technique [0002] Semiconductor-based photocatalysts have attracted extensive research attention over the past few decades. As an advanced oxidation technology, photocatalytic reaction has great application prospects in the fields of pollution control and solar energy conversion. Photocatalysts with high activity and good stability are essential for the practical application of photocatalytic technology. Commonly used photocatalysts include metal oxides and sulfides, such as TiO 2 , CuO and ZnS. [0003] TiO 2 Has good stability, light resistance and low toxicity and other properties. However, its wide bandgap and relatively high electron-hole recombination rate often lead to low quantum yield and po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04C02F1/30C02F101/30
CPCC02F1/30B01J27/04C02F2101/30C02F2305/10B01J35/39B01J35/51
Inventor 蒋银花李凡杨心砚彭志远刘佩佩张文莉
Owner JIANGSU UNIV
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