Graphene/antimony sulfide composite photocatalyst preparation method

A graphene and antimony sulfide technology, applied in the field of photocatalysis, can solve the problems of easy recombination, reduced photocatalytic efficiency, low solar energy utilization rate, etc., and achieves the effects of simple production process, high visible light photocatalytic activity, and excellent product quality.

Inactive Publication Date: 2016-05-04
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, with TiO 2 As a photocatalyst, there are two major defects: (1) it is a wide bandgap semiconductor (E g =3.2eV) materials, only the ultraviolet light with a wavelength less than 387nm can excite it, and the proportion of ultraviolet light energy in sunlight is less than 5%, so the utilization rate of solar energy is very low; (2) the light generated by light excitation The electron-hole pairs are easy to recombine, which greatly reduces its photocatalytic efficiency
This synthesis method has no literature reports at home and abroad, and is novel and creative

Method used

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  • Graphene/antimony sulfide composite photocatalyst preparation method
  • Graphene/antimony sulfide composite photocatalyst preparation method
  • Graphene/antimony sulfide composite photocatalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Add 30mg of graphene oxide (GO) into 60mL of deionized water, and ultrasonically disperse for 1 hour to prepare a 0.5mg / mL graphene oxide-deionized water dispersion.

[0023] (2) Add 0.26g of thioacetamide to the dispersion, the ratio of deionized water in the dispersion to the amount of sulfur in thioacetamide is 968:1, ultrasonically treat for 5 minutes, then add 0.23g of antimony tartrate Potassium, the ratio of the amount of sulfur in thioacetamide to potassium antimony potassium tartrate is 5:1, and magnetically stirred for 10 minutes to obtain a reaction mixture.

[0024] (3) The reaction mixture was transferred to a reaction kettle with a polytetrafluoroethylene liner, and reacted at 170° C. for 6 hours. After the reaction was completed, it was naturally cooled to room temperature, centrifuged, and the upper liquid was removed to obtain a black precipitate. The black precipitate was washed with deionized water and absolute ethanol alternately and ultrasonical...

Embodiment 2

[0026] (1) 30 mg of graphene oxide (GO) was added to 40 mL of deionized water, and ultrasonically dispersed for 2 hours to prepare a 0.75 mg / mL graphene oxide-deionized water dispersion.

[0027] (2) Add 0.49gL-cysteine ​​to the dispersion, the ratio of deionized water in the dispersion to the amount of sulfur in L-cysteine ​​is 550:1, sonicate for 6 minutes, then add 0.23 g antimony potassium tartrate, the ratio of sulfur in L-cysteine ​​to antimony potassium tartrate is 6:1, and magnetically stirred for 22 minutes to obtain a reaction mixture.

[0028] (3) The reaction mixture was transferred to a reaction kettle with a polytetrafluoroethylene liner, and reacted at 160° C. for 10 hours. After the reaction was completed, it was naturally cooled to room temperature, centrifuged, and the upper liquid was removed to obtain a black precipitate. The black precipitate was washed with deionized water and absolute ethanol alternately and ultrasonically for 3 times, and then dried in ...

Embodiment 3

[0030](1) 50 mg of graphene oxide (GO) was added to 50 mL of deionized water, and ultrasonically dispersed for 2 hours to prepare a 1 mg / mL graphene oxide-deionized water dispersion.

[0031] (2) Add 0.49g L-cysteine ​​to the dispersion, the ratio of deionized water in the dispersion to the amount of sulfur in L-cysteine ​​is 690:1, ultrasonically treat for 10 minutes, then add 0.18 g antimony potassium tartrate, the ratio of the amount of sulfur in L-cysteine ​​to antimony potassium tartrate is 7.6:1, and magnetically stirred for 30 minutes to obtain a reaction mixture.

[0032] (3) The reaction mixture was transferred to a reaction kettle with a polytetrafluoroethylene liner, and reacted at 180° C. for 12 hours. After the reaction was completed, it was naturally cooled to room temperature, centrifuged, and the upper liquid was removed to obtain a black precipitate. The black precipitate was washed with deionized water and absolute ethanol alternately and ultrasonically for 3...

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Abstract

The invention discloses a graphene/antimony sulfide composite photocatalyst preparation method. The method comprises adding graphene oxide into deionized water, carrying out ultrasonic dispersion, adding a sulfur source into the solution, carrying out ultrasonic treatment, adding antimony potassium tartrate into the solution, carrying out magnetic stirring to obtain a reaction mixture, carrying out hydro-thermal treatment on the reaction mixture, carrying out cooling, carrying out centrifugation to obtain black precipitates and washing and drying the black precipitates to obtain the graphene/antimony sulfide composite photocatalyst. The graphene/antimony sulfide composite photocatalyst has good compounding effects and high visible light photocatalytic activity and fully utilizes sun lights and indoor natural lights to realize photocatalytic degradation of environment pollutants. The preparation method has the advantages of simple processes, production process environmental friendliness, easy control of reaction parameters, low enforcement cost and excellent product quality and can be widely used for preparation of a graphene-based composite material.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a method for synthesizing a graphene / antimony sulfide composite photocatalyst by a hydrothermal method. Background technique [0002] At present, mankind is facing a very serious problem of environmental pollution, which has become a bottleneck restricting the development of human society. Semiconductor heterogeneous photocatalysis technology has attracted widespread attention because it can directly use sunlight and oxygen in the air to completely degrade toxic and harmful pollutants in the environment. It has a series of advantages such as low cost, convenient use, wide application range, environmental friendliness, complete mineralization of pollutants, and good oxidative decomposition of refractory organic matter. It is a promising new technology for green pollution control. . The application of this technology is of great significance to eliminate enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04
CPCB01J27/04B01J35/004
Inventor 朱启安王建霞白杲蒋叔立杜寒宇魏明杨
Owner XIANGTAN UNIV
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