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Preparation method for graphene and antimony sulphide nano-rod composite visible light catalyst

A graphene and antimony sulfide technology, applied in the field of photocatalysis, can solve the problems of easy recombination of photogenerated electrons and holes, low solar energy utilization rate, and low photocatalytic efficiency, so as to achieve easy control of reaction parameters and easy realization of large-scale industrial production , High photocatalytic efficiency

Inactive Publication Date: 2016-02-03
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But with TiO 2 As a photocatalyst, there are two major defects, one is its wide band gap (E g =3.2eV), only ultraviolet light with wavelength λ<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 low; The holes are easy to recombine, resulting in low photocatalytic efficiency
This synthesis method has no literature reports at home and abroad, and is novel and creative

Method used

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  • Preparation method for graphene and antimony sulphide nano-rod composite visible light catalyst
  • Preparation method for graphene and antimony sulphide nano-rod composite visible light catalyst
  • Preparation method for graphene and antimony sulphide nano-rod composite visible light catalyst

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Experimental program
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Effect test

Embodiment 1

[0027] (1) Weighing 60 mg of graphene oxide was added to 60 mL of 1,2-propanediol, and ultrasonically dispersed for 2 hours to obtain a 1 mg / mL graphene oxide-1,2-propanediol dispersion.

[0028] (2) Add 0.46gSbCl to the dispersion 3 , slightly heated, stirred to dissolve (SbCl 3With the ratio of the amount of substance of 1,2-propanediol in the dispersion liquid is 1:405), then add 0.18g sulfur powder, the amount of substance that adds sulfur powder is SbCl 3 2.8 times the amount of substance, continue to stir and mix to obtain a mixed solution, which is transferred to a three-necked flask.

[0029] (3) Slowly add 0.56g of sodium borohydride to the mixed solution while continuously magnetic stirring, the amount of sodium borohydride is 2.6 times that of the sulfur powder. Then, it was heated with an oil bath, and stirred and refluxed at 160° C. for 15 hours.

[0030] (4) After the reaction was completed, it was naturally cooled to room temperature and centrifuged to obtain...

Embodiment 2

[0032] (1) 25 mg of graphene oxide was weighed and added to 50 mL of ethylene glycol, and ultrasonically dispersed for 1 hour to obtain a 0.5 mg / mL graphene oxide-ethylene glycol dispersion.

[0033] (2) Add 0.37gSbCl to the dispersion 3 , slightly heated, stirred to dissolve (SbCl 3 With the ratio of the amount of substance of ethylene glycol in the dispersion liquid is 1:550), then add 0.20g sulfur powder, the amount of substance that adds sulfur powder is SbCl 3 3.9 times the amount of substance, continue to stir and mix to obtain a mixed solution, which is transferred to a three-necked flask.

[0034] (3) Slowly add 0.48g of sodium borohydride to the mixed solution while continuously magnetic stirring, the amount of sodium borohydride is 2.0 times that of the sulfur powder. Then, it was heated with an oil bath, and stirred and refluxed at 190° C. for 5 hours.

[0035] (4) After the reaction was completed, it was naturally cooled to room temperature and centrifuged to ob...

Embodiment 3

[0037] (1) Weighing 90 mg of graphene oxide was added to 45 mL of 1,2-propanediol, and ultrasonically dispersed for 3 hours to obtain a 2 mg / mL graphene oxide-1,2-propanediol dispersion.

[0038] (2) Add 0.47gSbCl to the dispersion 3 , slightly heated, stirred to dissolve (SbCl 3 With the ratio of the amount of substance of 1,2-propanediol in the dispersion liquid is 1:300), then add 0.14g sulfur powder, the amount of substance that adds sulfur powder is SbCl 3 2.2 times the amount of the substance, continue to stir and mix to obtain a mixed solution, which is transferred to a three-necked flask.

[0039] (3) Slowly add 0.68g of sodium borohydride to the mixed solution while continuously magnetic stirring, the amount of sodium borohydride is 4.0 times that of the sulfur powder. Then, it was heated with an oil bath, and stirred and refluxed at 170° C. for 10 hours.

[0040] (4) After the reaction was completed, it was naturally cooled to room temperature and centrifuged to o...

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Abstract

The invention provides a preparation method for graphene and antimony sulphide nano-rod composite visible light catalyst. The preparation method comprises the following steps: firstly adding oxidized graphene into ethylene glycol or 1,2-propanediol, performing ultrasonic dispersion, then adding SbCl3, heating, stirring to enable the mixture to be dissolved, adding sulfur powder, continuously stirring to enable the mixture to be uniform, adding sodium borohydride, stirring, performing reflux for a period of time, naturally cooling to the room temperature, and performing centrifugal separation to obtain a black precipitate; washing and drying the black precipitate to obtain the graphene and antimony sulphide nano-rod composite visible light catalyst. The photocatalyst prepared by the method is excellent in composite effect and high in visible light catalytic activity, has the advantages of being simple in production technology, safe in production process, easily-controllable in reaction parameter, low in implementation cost and easy to realize industrial production, and can be widely used for preparation of graphene-based composite one-dimensional nanometer materials.

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 nanorod composite visible light catalyst by a reflux method. Background technique [0002] Environmental pollution and energy shortage are two major problems facing mankind in the 21st century. Semiconductor heterogeneous photocatalysis technology has been widely valued because it can directly use sunlight and oxygen in the air to completely degrade environmental pollutants. This technology has a series of advantages such as low cost, wide application range, environmental friendliness, convenient use, complete mineralization of pollutants, and good oxidative decomposition of refractory organic matter. It is a promising new green pollution control technology. technology. The key to the application of photocatalytic technology is to develop suitable semiconductor photocatalysts. [0003] At present, among t...

Claims

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Application Information

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IPC IPC(8): B01J27/04B01J37/08A62D3/17A62D101/26A62D101/28
Inventor 朱启安杜寒宇白杲朱奕胡耐根魏明杨蒋叔立
Owner XIANGTAN UNIV
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