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Copper and silver co-doped nano-zinc oxide used as photocatalyst, and preparation method of copper and silver co-doped nano-zinc oxide

A nano-zinc oxide, photocatalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of unfavorable industrial production applications, limited photocatalytic activity of ZnO , the problem of high production cost, to achieve the effect of excellent photocatalytic activity, improved photocatalytic efficiency, and low difficulty

Inactive Publication Date: 2019-01-18
SOUTHWEST UNIVERSITY FOR NATIONALITIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, because Ag is a precious metal, doping Ag will bring about high production costs, which is not conducive to industrial production and application; on the other hand, its improvement in the photocatalytic activity of ZnO is relatively limited.

Method used

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  • Copper and silver co-doped nano-zinc oxide used as photocatalyst, and preparation method of copper and silver co-doped nano-zinc oxide
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  • Copper and silver co-doped nano-zinc oxide used as photocatalyst, and preparation method of copper and silver co-doped nano-zinc oxide

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Experimental program
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Effect test

Embodiment 1

[0029] What this embodiment prepares is the nano-ZnO photocatalyst that Cu, Ag co-doped, and wherein Cu accounts for Cu, Ag and ZnO total substance amount mole percentage is 0.2%, Ag accounts for Cu, Ag and ZnO total substance amount mole percent The percentage is 3%.

[0030] The steps of the nanometer ZnO photocatalyst that this comparative example prepares Cu, Ag co-doped are as follows:

[0031] Under stirring conditions, add 0.01936mol zinc acetate, 0.0006mol silver nitrate, 0.00004mol copper acetate and 2.5mL diethanolamine into 60mL absolute ethanol at room temperature, then continue to stir for 2 hours in a water bath at 57°C until the raw materials are completely dissolved After that, put it in a dark room and let it stand for 44 hours, and then put the obtained solution in an 80°C constant temperature blast drying oven to dry for 10 hours to obtain a wet gel, and then put the wet gel in a muffle furnace sintering furnace at a rate of 2°C / min. The heating rate was rais...

Embodiment 2

[0033] What the present embodiment prepares is the nano-ZnO photocatalyst that Cu, Ag co-doped, and wherein Cu accounts for Cu, Ag and ZnO total substance amount mole percentage is 1%, and Ag accounts for Cu, Ag and ZnO total substance amount mole percent The percentage is 3%.

[0034] The steps of the nanometer ZnO photocatalyst that this comparative example prepares Cu, Ag co-doped are as follows:

[0035] Under stirring conditions, add 0.0192mol zinc acetate, 0.0006mol silver nitrate, 0.0002mol copper acetate and 2.5mL diethanolamine into 60mL absolute ethanol at room temperature, then continue stirring for 2h in a water bath at 60°C until the raw materials are completely dissolved After that, put it in a dark room and let it stand for 48 hours, and then put the obtained solution in a 90°C constant temperature blast drying oven to dry for 8 hours to obtain a wet gel, and then put the wet gel in a muffle furnace sintering furnace at a rate of 1°C / min. The heating rate was r...

Embodiment 3

[0037] What the present embodiment prepares is the nano-ZnO photocatalyst of Cu, Ag co-doped, and wherein Cu accounts for Cu, Ag and ZnO total substance amount mole percentage is 3%, and Ag accounts for Cu, Ag and ZnO total substance amount mole percent The percentage is 3%.

[0038] The steps of the nanometer ZnO photocatalyst that this comparative example prepares Cu, Ag co-doped are as follows:

[0039] Under stirring conditions, add 0.0188mol zinc acetate, 0.0006mol silver nitrate, 0.0006mol copper acetate and 2.5mL diethanolamine into 60mL absolute ethanol at room temperature, then continue stirring for 2 hours in a water bath at 62°C until the raw materials are completely dissolved After that, put it in a dark room and let it stand for 50 hours, and then put the obtained solution in a constant temperature blast drying oven at 85°C and dry it for 9 hours to obtain a wet gel, and then put the wet gel in a muffle furnace sintering furnace at a rate of 2°C / min. The heating ...

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Abstract

The invention discloses copper and silver co-doped nano-zinc oxide used as a photocatalyst, and a preparation method of the copper and silver co-doped nano-zinc oxide. A sol-gel method is adopted, metal alkoxides (copper acetate and zinc acetate) and acid salt (silver nitrate) are used as raw materials and dissolved in a solvent to form gel with a certain spatial structure, finally drying and heattreatment processes are carried out, and thus the copper and silver co-doped nano-zinc oxide uniform in particle size and high in purity can be prepared. Copper and sliver are doped in zinc oxide, sothat the production cost is reduced and industrial production is achieved while the catalytic activity of the nano-zinc oxide is improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst material preparation, and relates to a method for preparing photocatalyst zinc oxide, in particular to a copper-silver co-doped zinc oxide composite photocatalyst and its preparation. Background technique [0002] Binary compounds with photocatalytic activity can be divided into metal oxides and metal sulfides according to their elemental composition. At present, the most commonly used and the most extensive scientific research is TiO 2 and ZnO. [0003] TiO 2 It has the characteristics of good stability and strong acid and alkali resistance, so it has received widespread attention. However TiO 2 The high band gap energy limits its light absorption utilization. In addition, TiO 2 There are three crystal forms, anatase, rutile and plate mineral: (1) the plate mineral is unstable; (2) the rutile is the most stable, with a better crystallization state and fewer defects, resulting in elect...

Claims

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Application Information

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IPC IPC(8): B01J23/89B01J35/00
CPCB01J23/8953B01J35/39
Inventor 徐明陈雨胡文宇刘禹彤袁欢
Owner SOUTHWEST UNIVERSITY FOR NATIONALITIES
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