Two-step method for preparing Zn0.2Cd0.8S/rGO composite material

A composite material, step-by-step technology, applied in the fields of nanotechnology, chemical instruments and methods, chemical/physical processes, etc. for materials and surface science, can solve the problems of increased cost, difficult control of reaction rate, and uncontrollable reaction, etc. Achieve good economic and social benefits, stabilize photocatalytic performance, and expand the effect of light response range

Inactive Publication Date: 2019-05-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the co-precipitation method has a fast reaction speed, simple and easy-to-operate process, and excellent product quality, but it has high requirements for temperature, high energy consumption, and the product is prone to sintering or melting, and the reaction is not easy to control
The microemulsion method has relatively simple operation, simple device, convenient operation, and uniform particles, but a large amount of organic matter will be produced, which will have a certain impact on the environment, cause environmental pollution, and the reaction rate is difficult to control. The processing of the product increases the cost of the reaction
The thermal decomposition method is easy to operate and has a fast reaction rate, but it is easy to cause product agglomeration, and the temperature required for the reaction is high, which requires high energy and cost for production

Method used

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  • Two-step method for preparing Zn0.2Cd0.8S/rGO composite material
  • Two-step method for preparing Zn0.2Cd0.8S/rGO composite material
  • Two-step method for preparing Zn0.2Cd0.8S/rGO composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Step 1: Take 5mL of ethylenediamine (EN) and add 20mL of deionized water to magnetically stir for 20min and ultrasonically disperse for 15min to form a mixed solution A;

[0032] Step 2: Get 0.2mmol of zinc acetate dihydrate (Zn(Ac) 2 2H 2 O) and 0.8 mmol of cadmium nitrate tetrahydrate (Zn(NO 3 )2 4H 2 O) add magnetic stirring in mixed solution A for 20min, and ultrasonically disperse for 15min to make mixed solution B;

[0033] Step 3: Take 2 mmol of L-cysteine ​​as a sulfur source, add it to the mixed solution B for magnetic stirring for 20 minutes, and ultrasonically disperse for 15 minutes to form a mixed solution C;

[0034] Step 4: Add the mixed solution C to the lining of polytetrafluoroethylene, control the filling ratio to 25%, and react at 160°C for 8 hours;

[0035] Step 5: After the reaction is completed, centrifuge and wash 3 times with deionized water and ethanol respectively, dry in vacuum at 60°C for 6 hours, and then grind to obtain Zn 0.2 Cd 0.8...

Embodiment 2

[0041] Step 1: Take 10 mL of ethylenediamine (EN) and add 40 mL of deionized water to magnetically stir for 30 minutes, and ultrasonically disperse for 30 minutes to form a mixed solution A;

[0042] Step 2: Get 0.3mmol of zinc acetate dihydrate (Zn(Ac) 2 2H 2 O) and 1.2 mmol of cadmium nitrate tetrahydrate (Zn(NO 3 ) 2 4H 2 O) adding magnetic stirring in mixed solution A for 30min, ultrasonic dispersion for 30min to make mixed solution B;

[0043] Step 3: Take 3 mmol of L-cysteine ​​as a sulfur source, add it to the mixed solution B for magnetic stirring for 30 minutes, and ultrasonically disperse for 30 minutes to form a mixed solution C;

[0044] Step 4: Add the mixed solution C to the lining of polytetrafluoroethylene, control the filling ratio to 50%, and react at 200°C for 12 hours;

[0045] Step 5: After the reaction is completed, centrifuge and wash 4 times with deionized water and ethanol respectively, dry in vacuum at 80°C for 8 hours, and grind to obtain Zn 0....

Embodiment 3

[0052] Step 1: Take 8mL of ethylenediamine (EN) and add 30mL of deionized water to magnetically stir for 40min and ultrasonically disperse for 20min to form a mixed solution A;

[0053] Step 2: Get 0.4mmol of zinc acetate dihydrate (Zn(Ac) 2 2H 2 O) and 1.6 mmol of cadmium nitrate tetrahydrate (Zn(NO 3 ) 2 4H 2 O) add magnetic stirring in mixed solution A for 40min, and ultrasonically disperse for 20min to make mixed solution B;

[0054] Step 3: Take 4 mmol of L-cysteine ​​as a sulfur source, add it to the mixed solution B for magnetic stirring for 40 minutes, and ultrasonically disperse it for 20 minutes to form a mixed solution C;

[0055] Step 4: Add the mixed solution C to the lining of polytetrafluoroethylene, control the filling ratio to 38%, and react at 180°C for 10 hours;

[0056] Step 5: After the reaction is completed, centrifuge and wash 5 times with deionized water and ethanol respectively, dry in vacuum at 70°C for 10 hours, and grind to obtain Zn 0.2 Cd 0...

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Abstract

The invention discloses a two-step method for preparing a Zn0.2Cd0.8S/rGO composite material. The method includes the steps: adding ethylenediamine into deionized water to prepare solution A; adding zinc acetate dihydrate and cadmium nitrate tetrahydrate into the solution A to form solution B; adding L-cysteine into the solution B to form solution C; adding the solution C into a lining of polytetrafluoroethylene to perform hydrothermal reaction; centrifugally and repeatedly washing a reactant by deionized water and ethyl alcohol after reaction is completed, and drying and grinding the washed reactant to obtain Zn0.2Cd0.8S powder; adding rGO into deionized water to prepare solution D; taking and adding the Zn0.2Cd0.8S powder into the solution D to form solution E; performing hydrothermal reaction on the solution E, centrifugally washing a reactant by deionized water and ethyl alcohol, and drying and grinding the washed reactant to obtain Zn0.2Cd0.8S/rGO material powder. The method is simple in preparation process and low in cost, light-generated electrons of Zn0.2Cd0.8S solid solution materials enter graphene by the aid of energy band structures of the graphene, the electrons and holes are limited in different phases, and light-generated electron-hole composition is restrained.

Description

technical field [0001] The present invention relates to a kind of preparation Zn 0.2 Cd 0.8 The method of S / rGO composite material, specifically relates to a two-step method for preparing Zn 0.2 Cd 0.8 Methods for S / rGO composites. Background technique [0002] In today's society, with the progress and development of society, the degree of industrialization and artificial intelligence is getting higher and higher, and the requirements for the materials used are also getting higher and higher. Traditional materials cannot meet the needs of use, so more and more Functional materials and composite materials have been developed rapidly. The Ⅱ-Ⅵ compounds are the focus and hotspot of the current research, and they have been paid attention to because of their broad application prospects in the fields of semiconductor lasers, sensors, solid-state luminescence and solar cells. where Zn x Cd 1-x As a novel material with good photocatalytic performance, S(0≤x≤1) solid solution ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B82Y30/00
Inventor 殷立雄李慧敏白培杰黄剑锋刘长青孔新刚张峰张浩繁
Owner SHAANXI UNIV OF SCI & TECH
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