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Composite visible light catalyst and its preparation method and application

A catalyst and visible light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems affecting photocatalytic activity and recycling effects, limiting practical applications, and easy photocorrosion, etc., to achieve Effects of improving visible light catalytic performance, stabilizing photocatalytic performance, and improving quantum efficiency

Inactive Publication Date: 2019-05-14
CHANGSHA UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Ag 3 PO 4 It is easy to be photocorroded in the photocatalytic process, and it will slowly dissolve in water, which affects its photocatalytic activity and recycling effect, and limits its practical application in water treatment.

Method used

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Effect test

Embodiment 1

[0030] A kind of composite visible light catalyst of the present invention, this composite visible light catalyst is made of CNT-silver citrate and g-C 3 N 4 -PO 4 3- Obtained by ion exchange precipitation, CNT-silver citrate is CNT, sodium citrate and AgNO 3 Obtained by surface ionization (complexation), g-C 3 N 4 -PO 4 3- is g-C 3 N 4 and NaH 2 PO 4 Obtained by surface phosphorylation.

[0031] A method for preparing the composite visible light catalyst of the above-mentioned present embodiment, comprising the following steps:

[0032] (1) Preparation of g-C 3 N 4

[0033] (1.1) Put 1 g of melamine in an alumina crucible (covered), raise the temperature to 500 °C at a heating rate of 5 °C / min, and react at this temperature for 3 hours;

[0034] (1.2) Naturally cool the alumina crucible to room temperature to collect the product and grind it into fine powder to obtain g-C 3 N 4 .

[0035] (2) CNT surface complexation

[0036] (2.1) Add 0.255g AgNO 3 Disper...

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Abstract

The invention discloses a composite visible-light-induced catalyst and a preparation method and application thereof. The composite visible-light-induced catalyst is prepared from CNT-silver citrate and g-C3N4-PO43- through a precipitation method, wherein the CNT-silver citrate is prepared from CNT, sodium citrate and AgNO3 through surface complexing action, and the g-C3N4-PO43- is prepared from g-C3N4 and NaH2PO4 through surface phosphorylation. The preparation method includes the steps of preparation of the CNT-silver citrate, preparation of the g-C3N4-PO43- and preparation of CNT / Ag3PO4 / g-C3N4. The composite visible-light-induced catalyst can be applied to treatment of antibiotic wastewater and has the advantages of high visible light utilization rate, stable presence in water and stable photocatalytic performance.

Description

technical field [0001] The invention belongs to the field of antibiotic wastewater treatment, and in particular relates to a composite visible light catalyst and its preparation method and application. Background technique [0002] In recent years, due to the widespread use of antibiotics, antibiotic wastewater has become a major source of industrial pollution. Due to the complex composition of antibiotic wastewater, it is difficult to biodegrade and bioaccumulate, which leads to the unsatisfactory treatment effect of traditional water treatment processes. In recent years, photocatalysis technology has received more and more attention. Photocatalysis technology is a kind of green environmental protection treatment technology, which is widely used to degrade refractory organic pollutants in water. Compared with traditional biological or physical-chemical methods, the great advantage of photocatalytic technology is that it can completely degrade pollutants into CO 2 、H 2 O ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C02F1/30
CPCY02W10/37
Inventor 罗琨张建社庞娅李雪廖兴盛裴习君刘运红
Owner CHANGSHA UNIVERSITY
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