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Ag/AgCl/CdWO4 catalyst with efficient visible-light catalytic activity

A catalytic activity, photocatalyst technology, applied in the field of photocatalysis, can solve problems such as improving the photocatalytic performance of CdWO4, and achieve the effects of broad industrial application prospects, simple production process conditions, and easy availability of raw materials

Inactive Publication Date: 2017-06-27
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to literature reports, no one has improved CdWO by plasmon resonance effect 4 photocatalytic performance

Method used

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  • Ag/AgCl/CdWO4 catalyst with efficient visible-light catalytic activity
  • Ag/AgCl/CdWO4 catalyst with efficient visible-light catalytic activity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] (1) CdWO 4 Synthesis

[0013] Weigh 2mmol of Na respectively 2 WO 4 2H 2 O and 2mmol of Cd(NO 3 ) 2 4H 2 O, dissolved in a mixed solution composed of water and ethylene glycol, stirring continuously until dissolved; transferred to a hydrothermal reaction kettle, 100 ° C, hydrothermal crystallization for 2 days; suction filtration, washing, and drying; that is, CdWO 4 , consistent with the monoclinic phase (card JCPDS14-0676), product XRD see attached figure 1 , the measured specific surface area is 78.4m 2 / g.

[0014] (2) Ag / AgCl / CdWO with plasmon resonance effect 4 Preparation of photocatalyst

[0015] (a) Weigh 0.4mmol AgNO 3 , add it to 30mL of ethanol aqueous solution, add CdWO prepared by hydrothermal method 4 , stirring continuously until uniformly dispersed; Weigh 0.4mmol KCl, add it to 20mL ethanol aqueous solution, dissolve, and then add it dropwise to the solution containing CdWO 4 , AgNO 3 After the dropwise addition, continue to stir for 30 to...

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Abstract

The invention provides a preparation method for an Ag / AgCl / CdWO4 catalyst with an efficient visible-light catalytic activity and an application in various dyes capable of catalytically degrading under visible light. The method comprises the following steps: by taking sodium tungstate and chromic nitrate as main raw materials and taking water and glycol as a mixed solvent, adopting a hydrothermal method for preparing a CdWO4 material, and then adopting a dipping and photo-reduction method for preparing the Ag / AgCl / CdWO4 photocatalyst with a plasma resonance effect. The catalyst prepared according to the method has excellent photocatalytic degradation property to various dyes, such as gold orange II, methyl orange, methyl blue, peacock green, crystal violet and rhodamine B under the irradiation of visible light; the degradation rate within 10 minutes can reach up to 95% or above; the mineralization rate is high; the catalyst is reusable. The production process conditions are simple, the raw materials are easily acquired and the acquired material has efficient photo-response and wide industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and relates to a preparation method of a photocatalyst with high-efficiency degradation activity of various organic dyes under visible light. More specifically, a Ag / AgCl / CdWO with plasmon resonance effect 4 Preparation of photocatalysts and applications for degradation of various organic dyes. Background technique [0002] With the development of modern society and economy, energy and environmental issues have become increasingly prominent, and people are eager to obtain clean energy and remove pollutants through green and environmentally friendly methods. In recent years, semiconductor photocatalysis technology has become an effective method to treat refractory wastewater due to its environmental friendliness, mild reaction conditions, and ability to mineralize organic pollutants. TiO 2 Due to its high-efficiency photocatalytic activity, chemical stability, cheapness, and non-toxicity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/138B01J37/08B01J37/02B01J37/16C02F1/30C02F101/30
CPCC02F1/30B01J23/002B01J27/138B01J37/0201B01J37/08B01J37/16C02F2101/308B01J35/39
Inventor 陈静陈建侯文华朱红军张彩婷沈英黎杨张荣
Owner NANJING UNIV OF TECH
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