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Method for preparing carbon-coated zinc sulfide microspheres through microwave hydrothermal method

A technology of microwave hydrothermal method and carbon coating, which is applied in the field of nanomaterials, can solve problems such as restricting development, and achieve the effects of strong feasibility, strong crystallinity, and good dispersion

Inactive Publication Date: 2016-12-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large band gap (3.6eV) of zinc sulfide, it can only show high catalytic activity under ultraviolet light, and its cross stability also restricts its development in the field of photocatalytic research.

Method used

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  • Method for preparing carbon-coated zinc sulfide microspheres through microwave hydrothermal method
  • Method for preparing carbon-coated zinc sulfide microspheres through microwave hydrothermal method
  • Method for preparing carbon-coated zinc sulfide microspheres through microwave hydrothermal method

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Effect test

Embodiment 1

[0027] 1) 1mmol of analytically pure Zn(NO 3 ) 2 ·6H 2 The precursor solution that the thiourea of ​​O and 40mmol is dissolved in deionized water makes;

[0028] 2) Add 2 g of glucose to the precursor solution under magnetic stirring conditions, and keep stirring for 1-2 hours;

[0029] 3) After fully stirring, put the reaction precursor solution in the polytetrafluoroethylene lining, the filling rate is 35%; after sealing the hydrothermal reaction kettle, put it into the microwave hydrothermal reaction apparatus, react at 180 ° C for 1 hour, and react Naturally cool to room temperature after finishing;

[0030] 4) The product was successively washed by centrifugation with deionized water and absolute ethanol, and the product was collected and vacuum-dried to obtain carbon-coated zinc sulfide microspheres.

Embodiment 2

[0032] 1) 1.6mmol of analytically pure Zn(NO 3 ) 2 ·6H 2 The precursor solution that the thiourea of ​​O and 40mmol is dissolved in deionized water makes;

[0033] 2) Add 1 g of glucose to the precursor solution under magnetic stirring conditions, and keep stirring for 1-2 hours;

[0034] 3) After fully stirring, put the reaction precursor solution in the polytetrafluoroethylene lining, the filling rate is 35%; after sealing the hydrothermal reaction kettle, put it into the microwave hydrothermal reaction apparatus, and react at 180 ° C for 2 hours, and the reaction Naturally cool to room temperature after finishing;

[0035] 4) The product was successively washed by centrifugation with deionized water and absolute ethanol, and the product was collected and vacuum-dried to obtain carbon-coated zinc sulfide microspheres.

Embodiment 3

[0037] 1) 2mmol of analytically pure Zn(NO 3 ) 2 ·6H 2 The precursor solution that the thiourea of ​​O and 20mmol is dissolved in deionized water makes;

[0038] 2) Add 0.1 g of glucose to the precursor solution under the condition of magnetic stirring, and keep stirring for 1-2 hours;

[0039] 3) After fully stirring, put the reaction precursor solution in the polytetrafluoroethylene lining, and the filling rate is 50%; after sealing the hydrothermal reaction kettle, put it into the microwave hydrothermal reaction apparatus, and react at 100°C for 2h, and react Naturally cool to room temperature after finishing;

[0040] 4) The product was successively washed by centrifugation with deionized water and absolute ethanol, and the product was collected and vacuum-dried to obtain carbon-coated zinc sulfide microspheres.

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Abstract

The invention discloses a method for preparing carbon-coated zinc sulfide microspheres through a microwave hydrothermal method. The method includes following steps: 1), dissolving analytically-pure Zn(NO3)2.6H2O and a sulfur source in deionized water to obtain a precursor solution; 2), adding a carbon source into the precursor solution during magnetic stirring; 3), sufficiently stirring, putting reaction precursor liquid in a polytetrafluoroethylene liner, sealing a hydrothermal reaction kettle, placing the hydrothermal reaction kettle into a microwave hydrothermal reactor for reaction, and naturally cooling to room temperature after reaction finishes; 4), washing a product, and vacuum drying to obtain the carbon-coated zinc sulfide microspheres. The method is short in reaction time, simple, efficient, low in cost and high in feasibility, thereby being highly economical and practical and having great industrialization prospect.

Description

【Technical field】 [0001] The invention relates to the field of nanomaterials, in particular to a method for preparing carbon-coated zinc sulfide microspheres by a microwave hydrothermal method. 【Background technique】 [0002] ZnS, as an important transition metal sulfide, has been extensively studied in fluorescence, bioimaging, photocatalysis, and sensors due to its unique optical, electrical, and catalytic properties. In particular, zinc sulfide (ZnS) has a faster photogenerated electron-hole generation rate and a higher conduction band redox potential, which has been proved to be a better photocatalyst material. However, zinc sulfide can only show high catalytic activity under ultraviolet light due to its large band gap (3.6eV), and its cross-stability also restricts its development in the field of photocatalytic research. 【Content of invention】 [0003] The object of the present invention is to provide a method for preparing carbon-coated zinc sulfide microspheres by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/08B01J37/10A62D3/17A62D101/26A62D101/28
CPCA62D3/176B01J27/04B01J37/10A62D2101/28A62D2101/26B01J35/51B01J35/39
Inventor 殷立雄张东东房佳萌张峰黄剑锋孔新刚张浩刘长青
Owner SHAANXI UNIV OF SCI & TECH
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