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Preparation method of visible-light photocatalyst silver carbonate

A photocatalyst and catalyst technology, applied in the field of photocatalysis, can solve the problems of poisoning, low utilization efficiency of visible light, unsatisfactory, etc., and achieve the effect of high photocatalytic performance

Inactive Publication Date: 2016-04-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the field of photocatalysis, TiO 2 The application is very wide, but it only responds in the ultraviolet range, and the utilization efficiency of visible light is low, although the modified TiO 2 Some visible light activity, but still unsatisfactory
For example: organic dyes photosensitized by organic dyes will undergo photochemical reactions such as degradation, while precious metal deposition is expensive and prone to poisoning and inactivation

Method used

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  • Preparation method of visible-light photocatalyst silver carbonate
  • Preparation method of visible-light photocatalyst silver carbonate
  • Preparation method of visible-light photocatalyst silver carbonate

Examples

Experimental program
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Embodiment 1

[0020] First, weigh a certain mass of silver fluoride and sodium bicarbonate solids, and then dissolve them in deionized water to prepare a certain concentration of silver fluoride solution and sodium bicarbonate solution. Under the condition of magnetic stirring, the The sodium bicarbonate solution was added dropwise into the silver fluoride solution to obtain a light yellow turbid solution. After the dropwise addition, magnetic stirring was continued for 2.5 hours at room temperature and protected from light, and the precipitate was filtered, washed, and dried at 50°C. Grinding to obtain a silver carbonate photocatalyst with visible light catalytic effect.

Embodiment 2

[0022] Mix the sodium bicarbonate solution and the silver fluoride solution in the above embodiment 1 directly, move it into a hydrothermal kettle, heat it in the range of 60-220°C for 1-72h after tightening, take out the hydrothermal kettle, cool to normal temperature, and obtain Precipitation, and then the precipitation is filtered, washed, dried at 50°C, and ground to obtain a silver carbonate photocatalyst with visible light catalytic effect.

Embodiment 3

[0024] Change the silver fluoride in the above embodiment 1 and embodiment 2 to silver nitrate or silver acetate, and the precipitate can still be obtained, and then the precipitate is filtered, washed, dried at 50°C, and ground to obtain silver carbonate light with visible light catalytic effect. catalyst.

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Abstract

The invention provides a preparation method of a photocatalyst silver carbonate which has photocatalytic activity under visible light. The invention relates to the field of photocatalysis. According to the invention, soluble silver salt and carbonate are adopted as reactants; a reaction is carried out with an ion exchange coprecipitation method or a hydrothermal method, such that silver carbonate precipitate is obtained; and through filtering, washing and drying, the silver carbonate photocatalyst is obtained. No sacrificial agent is doped during the preparation process. The preparation process is simple. The product Ag2CO3 has high photocatalytic efficiency and good catalyst stability. The product is suitable for wide applications in production practices.

Description

technical field [0001] The invention relates to the field of photocatalysis, in particular to a method for preparing visible light catalyst silver carbonate. technical background [0002] Since Fujishima et al. discovered TiO in 1972 2 Since the photocatalytic degradation of water, photocatalytic technology has become a hot research field. At present, the focus of research in this field is mainly on environmental governance. Due to the advantages of being able to degrade most organic pollutants without secondary pollution and mild reaction conditions, photocatalytic technology has become a promising environmental pollution control technology. In the field of photocatalysis, TiO 2 The application is very wide, but it only responds in the ultraviolet range, and the utilization efficiency of visible light is low, although the modified TiO 2 Has some visible light activity, but still unsatisfactory. For example, organic dyes photosensitized by organic dyes will undergo photo...

Claims

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Application Information

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IPC IPC(8): B01J27/232C01G5/00
Inventor 蒋炜王晓燕梁斌
Owner SICHUAN UNIV
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