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Zinc-doped silver ferrite catalyst, preparation method and application thereof

A technology of silver ferrite and catalyst, applied in the field of zinc-doped silver ferrite catalyst and its preparation, can solve the problems of difficult recovery, small specific surface area of ​​silver monoferrite, difficult separation and the like, achieve resource saving and easy control of reaction process , the effect of strong catalytic ability

Active Publication Date: 2020-11-06
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a zinc-doped silver ferrite catalyst and its preparation method and application. By doping silver ferrite with zinc element, the valence band position of silver ferrite is improved, making its valence band The electrons on the surface are easier to transition, and the obtained zinc-doped silver ferrite catalyst not only has a larger specific surface area, but also has higher catalytic performance than the silver ferrite catalyst, and is easy to separate and recycle, effectively improving the specific surface area of ​​silver monoferrite. , the shortcomings of not easy to separate and difficult to recycle

Method used

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  • Zinc-doped silver ferrite catalyst, preparation method and application thereof
  • Zinc-doped silver ferrite catalyst, preparation method and application thereof
  • Zinc-doped silver ferrite catalyst, preparation method and application thereof

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preparation example Construction

[0057] The invention provides a method for preparing a zinc-doped silver ferrite catalyst, comprising:

[0058] providing a mixture comprising silver salts, zinc salts and iron salts;

[0059] The mixed liquid is mixed and reacted with an alkaline substance, and then solid-liquid separation is carried out, and the solid is the zinc-doped silver ferrite catalyst.

[0060] The mixed solution is obtained by mixing silver salt solution, zinc salt solution and iron salt solution;

[0061] Preferably, the silver ion concentration in the silver salt solution is 0.06-0.10mol / L, the zinc ion concentration in the zinc salt solution is 0.01-0.02mol / L; when the iron ion concentration in the iron salt solution is 0.06-0.10mol / L, it can ensure that each salt The solution is mixed thoroughly.

[0062] Above-mentioned silver salt solution can comprise at least one in silver nitrate solution and silver sulfate solution; The content is 50-60% of the total mass of silver-containing nitrate), ...

Embodiment 1

[0082] (1) Accurately weigh 20 parts of silver-containing nitrate (wherein the content of silver ions is 60% of the total mass of silver-containing nitrate), and make it completely dissolved in 100 parts of deionized water by stirring to obtain a silver nitrate solution for subsequent use;

[0083] (2) Accurately weigh 10 parts of zinc nitrate tetrahydrate, and make it completely dissolved in 100 parts of deionized water by stirring to obtain ferric nitrate solution for subsequent use;

[0084] (3) Accurately weigh 20 parts of ferric nitrate nonahydrate, and make it completely dissolved in 100 parts of deionized water by stirring to obtain ferric nitrate solution for subsequent use;

[0085] (4) Accurately weigh 150 parts of sodium hydroxide, make it be dissolved in 100 parts of deionized water completely by stirring, obtain sodium hydroxide solution for subsequent use;

[0086] (5) According to the molar ratio of silver ions in silver nitrate solution, zinc ions in zinc nitra...

Embodiment 2

[0089] The difference of this embodiment with embodiment 1 is: step (5) is replaced by: press the mol ratio of hydroxide ion in silver ion in silver nitrate solution, zinc ion in zinc nitrate solution, iron ion in ferric nitrate solution and sodium hydroxide solution Take silver nitrate solution, zinc nitrate solution, ferric nitrate solution and sodium hydroxide solution at the ratio of 7.5:1:10:120; others are the same as in Example 1.

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Abstract

The invention provides a zinc-doped silver ferrite catalyst, a preparation method and application thereof. The preparation method of the zinc-doped silver ferrite catalyst comprises the following steps of: providing a mixed solution which comprises a silver salt, a zinc salt and a ferric salt; mixing the mixed solution with an alkaline substance for reaction, and then performing solid-liquid separation to obtain a solid, namely the zinc-doped silver ferrite catalyst. According to the invention, the zinc element is doped with silver ferrite, so that the obtained zinc-doped silver ferrite catalyst not only has larger specific surface area and higher catalytic performance than the silver ferrite catalyst, but also is easy to separate and recycle.

Description

technical field [0001] The invention relates to the technical field of new catalyst materials, in particular to a zinc-doped silver ferrite catalyst and a preparation method and application thereof. Background technique [0002] With the rapid development of the printing and dyeing industry, the illegal discharge of a large amount of printing and dyeing wastewater has caused a large amount of water pollution, which seriously threatens the natural environment and human life, health and safety. How to quickly and effectively degrade macromolecular dyes has become an extensive research issue in the environmental field. Most water-soluble azo dyes contain benzene rings and are stable in nature. Traditional chemical and biological methods are difficult to achieve good results. The use of catalysts to catalyze the degradation of pollutants in water is a more common method now, and the use of photogenerated strong oxidants to completely oxidize organic pollutants to H 2 O.CO 2 Su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/00B01J35/10C02F1/30C02F101/30
CPCB01J23/8953C02F1/30C02F2305/10C02F2101/30C02F2101/308B01J35/61B01J35/39Y02W10/37
Inventor 郭亚丹李晨曦郭耀萍王光辉王学刚
Owner EAST CHINA UNIV OF TECH
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