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CdxZn1-xS nanowire compound photocatalyst and preparing method and application thereof

A cdxzn1-xs and nanowire technology, which is applied in the preparation of amino compounds, chemical instruments and methods, and the preparation of organic compounds, can solve undeveloped problems and achieve the effect of fast reaction speed and high conversion rate

Active Publication Date: 2016-03-30
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining GQDs with Cd x Zn 1-x S nanowire composites can obtain highly active composite photocatalysts, but this composite material has not yet been developed

Method used

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  • CdxZn1-xS nanowire compound photocatalyst and preparing method and application thereof
  • CdxZn1-xS nanowire compound photocatalyst and preparing method and application thereof
  • CdxZn1-xS nanowire compound photocatalyst and preparing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Under stirring conditions, 1mmolCd(Ac) 2 2H 2 O and 2 mmol of copper reagent were dissolved in 34 mL of ethylenediamine and 6 mL of n-dodecanethiol mixed solvent and magnetic stirring was continued for 10 minutes. Transfer this solution to a 50 mL polytetrafluoroethylene-lined autoclave. The reaction kettle was placed in a blast drying oven at 180°C for 48 hours. After the reaction was completed, when the temperature dropped to room temperature, the product was centrifuged, washed alternately with absolute ethanol and deionized water, and dried to obtain CdS nanowire powder. Take 0.0864g of CdS nanowires and mix them with 0.6mmol of zinc nitrate pentahydrate, add them into 40mL of ethylene glycol under the condition of stirring, stir for 10 minutes, and ultrasonically mix. Then the mixed solution was transferred into a 50mL reaction kettle, and placed in a 160°C forced-air drying oven to react for 6 hours. After the reaction, the product was centrifuged, washed alte...

Embodiment 2

[0060] As an application of the present invention:

[0061] Put 30mL of 20mg / L p-nitroaniline solution in a beaker, add 40mg of ammonium formate under stirring conditions, and then weigh 20mg of GQDs / Cd x Zn 1-x S composite photocatalyst, ultrasonic for 3 minutes to make the catalyst uniformly dispersed in the reaction solution. The reaction solution was magnetically stirred for 2 hours in the dark, so that the catalyst and the reactant reached adsorption equilibrium. Irradiate with visible light with a wavelength of 500W xenon lamp (λ>420nm), and the distance between the light source and the reaction system is 12cm. Samples were taken every 2 minutes, and the ultraviolet absorption of the supernatant was measured after centrifugation. As the reaction progressed, the color of the solution gradually changed from yellow to colorless.

[0062] like Image 6As shown, p-nitroaniline can be completely converted into p-phenylenediamine within 6 min. Further prolonging the illum...

Embodiment 3

[0064] Add 20mg of the same mass of CdS nanowires, Cd with different doping zinc concentration x Zn 1-x S nanowires and GQDs / Cd with different loadings x Zn 1-x S nanowires, the photocatalytic test conditions are the same as in Example 2, and the relative activity of different samples is studied. The result is as Figure 7 Shown, GQDs / Cd x Zn 1-x S nanowire composites than single GQDs / Cd x Zn 1-x S all have better activity. When the amount of GQDs was 0.21 (wt), the activity of the composite catalyst was the best.

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PUM

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Abstract

The invention discloses a GQDs / CdxZn1-xS nanowire structure compound photocatalyst. The photocatalyst is formed by doping zinc ions in CdS nanowires to form solid solution CdxZn1-xS nanowires and attaching GQDs with good electron transport capability to the surfaces of the CdxZn1-xS nanowires, wherein the GQDs / CdxZn1-xS nanowire structure compound photocatalyst is of a linear structure. The GQDs / CdxZn1-xS nanowire scompound photocatalyst has the advantages that the prepared GQDs / CdxZn1-xS nanowire compound photocatalyst can efficiently catalyze paranitroaniline to prepare p-phenylenediamine under the irradiation of visible light, and is high in reaction speed and conversion rate and the like.

Description

technical field [0001] The invention belongs to the field of controllable synthesis of nanomaterial photocatalyst and sustainable development of environment and energy, and specifically relates to a GQDs / Cd x Zn 1-x Preparation of S nanowire composite photocatalyst and its application in photocatalytic reduction of p-nitroaniline to prepare p-phenylenediamine. Background technique [0002] Photocatalysis is the intersection of photochemistry and catalytic science, and generally refers to photochemical reactions with the participation of catalysts. In the face of increasingly tense energy problems and severe environmental problems, most of the current research work is mainly focused on environmental governance and improvement such as degradation of pollutants in water and air, conversion of solar energy and electrochemical processes such as interface electron transfer. Photocatalytic technology can also be used in organic chemical reactions. Recently, visible light catalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04B01J35/02C07C209/36C07C211/51B01J35/00
CPCC07C209/36B01J21/18B01J27/04B01J35/00B01J35/30B01J35/39C07C211/51
Inventor 马德琨屈德朋马剑华陈修陈嘉钟嘉鑫黄少铭
Owner WENZHOU UNIVERSITY
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