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Novel photocatalyst for adsorbing and degrading azo dyes and preparation method thereof

A photocatalyst and azo dye technology, applied in the field of photocatalysis, can solve the problems of insufficient contact reaction with light, difficult solid-liquid separation, low catalyst utilization rate, etc., and achieve easy recycling and reuse of catalysts, simple separation, high ratio The effect of surface area

Inactive Publication Date: 2018-07-13
SOUTHWEST PETROLEUM UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] One purpose of the present invention is to solve the technical problems of ZnO photocatalysts such as difficult solid-liquid separation in the treatment of azo dye wastewater, insufficient contact reaction with light, and low catalyst utilization.

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  • Novel photocatalyst for adsorbing and degrading azo dyes and preparation method thereof
  • Novel photocatalyst for adsorbing and degrading azo dyes and preparation method thereof
  • Novel photocatalyst for adsorbing and degrading azo dyes and preparation method thereof

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Embodiment Construction

[0026] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0027] One, preparation method embodiment

[0028] A preparation method for a novel photocatalyst for adsorption and degradation of azo dyes, comprising the steps of:

[0029] Step 1, prepare the Cr-doped ZnO containing magnetic material: the Zn(NO of 2mmol 3 ) 2 ·6H 2 O, 0.12mmol of Cr(NO 3 ) 3 9H 2 O, 0.12mmol of Fe(NO 3 ) 3 9H 2 O was dissolved in 40ml of ethanol, and stirred at room temperature for 20min to obtain solution A; 40ml of NaOH ethanol solution with a concentration of 4mol / L was added to solution A under stirring conditions, and stirred at room temperature for 1h, and then the reaction solution was transferred Put it into a Teflon reactor, and ...

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Abstract

The invention discloses a novel photocatalyst for adsorbing and degrading azo dyes. The novel photocatalyst is Cr-doped ZnO containing a magnetic material and fixedly carried on optical fiber. A preparation method of the photocatalyst comprises the following steps of: (S1) preparing the Cr-doped ZnO containing the magnetic material: dissolving soluble zinc salt, chromium salt and ferric salt in alcohol to obtain solution A, adding alcohol solution of NaOH into the solution A, stirring, after heating for reaction, centrifugally separating, drying precipitates to obtain Cr-ZnO / gamma-Fe2O3; (S2)using the optical fiber to embed the Cr-ZnO / gamma-Fe2O3: (S21) removing an outer coating layer on the surface of the optical fiber, and exposing an optical-fiber core body; (S22) adopting a sol-gel method to embed Cr-ZnO / gamma-Fe2O3 on the surface of the optical-fiber core body to obtain the novel photocatalyst. The novel photocatalyst disclosed by the invention has the beneficial effects that thephotocatalyst is embedded on the surface of the optical fiber, so that the defect that the photocatalyst in the ordinary porous carrier hole can not be illuminated by light to cause waste of the photocatalyst is overcome, and the effective utilization rate of the photocatalyst is improved.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a novel photocatalyst for absorbing and degrading azo dyes and a preparation method thereof. Background technique [0002] The chemical properties of azo dyes are relatively stable, so the components of the wastewater are relatively complex and difficult to completely degrade. The direct discharge of untreated wastewater into rivers and lakes will cause serious water pollution and lead to a sharp deterioration of the aquatic environment. Traditional treatment methods such as coagulation precipitation, adsorption, membrane separation, and air flotation are non-destructive physical treatment technologies, which only transfer the dyes between phases, and do not really decolorize and mineralize the dyes. And it will cause secondary pollution. Among them, the regeneration problems of coagulants and adsorbents have not been reasonably solved. Although chemical, bi...

Claims

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Application Information

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IPC IPC(8): B01J23/86B01J20/02B01J20/28B01J23/00C02F1/28C02F1/30C02F101/30
CPCB01J20/0218B01J20/0229B01J20/0244C02F1/281C02F1/30B01J20/28009B01J23/002B01J23/862C02F2101/308B01J2523/00B01J35/33B01J35/39B01J2523/27B01J2523/67B01J2523/842
Inventor 熊艳陈杰段明方申文吴家仪
Owner SOUTHWEST PETROLEUM UNIV
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