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Electrochemical method for preparing silver halide photocatalytic material

A technology of silver halide and composite materials, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve problems that have not been reported, and achieve simple preparation methods, Excellent catalytic activity, easy to control the effect

Inactive Publication Date: 2012-02-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Electrochemistry is a simple, convenient and effective method for synthesizing materials. By controlling the voltage or current, the size and even the shape of the synthesized materials can be well regulated. Unreported work on silver halide (visible) photocatalytic materials

Method used

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  • Electrochemical method for preparing silver halide photocatalytic material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Configure 0.5M KBr solution and use it as the electrolyte, and use silver sheet, silver / silver chloride, and silver wire as the working electrode, reference electrode, and counter electrode for electrolysis. Wherein the electrode potential is controlled at 3.2V. After the electrolysis, the silver sheet deposited with silver bromide is placed in a beaker filled with double distilled water, placed in an ultrasonic cleaning tank, and ultrasonicated until the surface of the silver sheet turns silvery white completely. The silver flakes were removed and the resulting silver bromide was filtered, washed and dried. Weigh 0.09g silver bromide powder, join in the methyl orange solution of 15ml, carry out irradiation under visible light 15 minutes, methyl orange degrades completely, repeats 10 times, this catalyst still has stable photocatalytic degradation performance, figure 1 The data of the catalyst degrading methyl orange solution for 10 cycles are given in .

Embodiment 2

[0018] Configure 2.0M NaCl solution, then disperse graphene oxide into the solution, and use the composite solution as the electrolyte, and use silver sheet, silver / silver chloride, and silver wire as the working electrode, reference electrode and counter electrode respectively , for electrolysis. The electrode potential was controlled at 3.0V, and ultrasound was applied synchronously during the electrolysis process. After the electrolysis, the silver chloride / graphene oxide composite material obtained was filtered, washed and dried, and stored in the dark for later use.

Embodiment 3

[0020] Configure 1.0M KI solution, then disperse polypyrrole into the solution, and use the composite solution as the electrolyte, and use silver sheet, silver / silver chloride, and silver wire as the working electrode, reference electrode and counter electrode respectively, Perform electrolysis. The electrode potential was controlled at 2.0V, and ultrasound was applied synchronously during the electrolysis process. After the electrolysis, the silver iodide / polypyrrole composite material obtained was filtered, washed and dried, and stored in a dark and dry environment until use.

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Abstract

The invention discloses a method for producing silver halide and a silver halide composite photocatalyst used for (visible) photocatalysis. According to the invention, a quaternary ammonium salt aqueous solution containing different salt brine (or halogen acid) or halogen is subjected to anode electrolysis treatment by a silver electrode to obtain various silver halide materials (silver chloride,silver bromide and silver iodide); a plurality of functional powder materials of oxidized graphene, reduced grapheme, polypyrrole, carbon nanotube and the like are dispersed in the aqueous solution containing different salt brine (or halogen acid), and is subjected to anode electrolysis treatment by the silver electrode to obtain various silver halide composite materials. The ultrasonic effect during the process of electrolysis or after electrolyzing is combined to obtain the composite material powder of silver halide or silver halide. The powder material has good performance of photocatalytic degradation of organic compounds. The method has the advantages of simple process, easy control and easy realization.

Description

technical field [0001] The invention relates to a preparation method of silver halide and silver halide composite photocatalytic material, in particular to anodic electrolytic synthesis of silver halide and silver halide composite material on the surface of silver electrode, detachment of silver halide and silver halide composite material from the electrode surface, halide Silver and silver halide composite recycling and other processes. Background technique [0002] As we all know, silver halide is a good photosensitive material, which is widely used in industries such as photography and film. In recent years, the photocatalysis of silver halide materials, especially the visible light catalytic performance, has attracted the attention of many researchers. [0003] Catalytic materials, or the performance of catalyst materials, after the material is determined, depend to a large extent on its structure, particle size and other properties, and the latter can be achieved throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/10B01J27/08B01J31/26B01J37/34C02F1/30
Inventor 赵崇军兰永焕董建波徐云龙钱秀珍
Owner EAST CHINA UNIV OF SCI & TECH
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