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A magnetically controlled separation photocatalyst for dye sewage treatment and its preparation method

A photocatalyst and photocatalytic technology, applied in the directions of light water/sewage treatment, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of affecting catalytic activity, unfavorable recycling and reuse, etc., to achieve improved catalytic performance, preparation of Simple method and low cost effect

Inactive Publication Date: 2018-02-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this photocatalyst also has a fatal shortcoming, because planar macrocyclic compounds tend to aggregate, which will affect the catalytic activity and limit its use [M.Q.Hu, Y.M.Xu, J.C.Zhao, Efficient photosensitized degradation of 4-chlorophenol over immobilizedaluminum tetrasulfophthalocyanine in the presence of hydrogen peroxide, Langmuir.20(2004) 6302-6307]
On the other hand, because it can be dispersed in aqueous solution, there are also disadvantages in recycling.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A magnetron separation photocatalyst for dye sewage treatment, comprising magnetic attapulgite, and the magnetic attapulgite is loaded with octacarboxy metal phthalocyanine. Its preparation method is:

[0019] Step 1: Purification and activation of attapulgite and its magnetic functionalization:

[0020] Disperse the untreated attapulgite with a diameter of 40-80nm and a length of 0.5-2μm through a 200-mesh sieve and disperse it in 700mL of distilled water, settle for 2 hours naturally, remove the upper impurities, and disperse it in an ultrasonic tank for 1 hour , then add 500mL of 1M HCl solution into the distillation bottle, place it in an ultrasonic oscillator for ultrasonic dispersion for 1h, and then centrifuge it in a centrifuge at 12000r / min for 5min, take the clean attapulgite on the upper layer, collect it with absolute ethanol Wash 3 times and centrifuge (pH close to neutral).

[0021] Disperse 0.7 g of attapulgite after acid activation treatment in a flask...

Embodiment 2

[0024] The composite photocatalyst was prepared according to the same method described in Example 1, except that the addition amount of octacarboxyphthalocyanine iron was 50 ml.

Embodiment 3

[0026] The composite photocatalyst was prepared according to the same method described in Example 1, except that the addition amount of octacarboxyphthalocyanine iron was 75ml.

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Abstract

The invention provides a magnetron separating photocatalyst used for dye sewage treatment and a preparation method for the magnetron separating photocatalyst. The magnetron separating photocatalyst for dye sewage treatment is characterized by comprising magnetic attapulgite, wherein octacarboxylic phthalocyanine aluminum and cobalt or derivatives of octacarboxylic phthalocyanine aluminum and cobalt are loaded on the magnetic attapulgite. The preparation method for the magnetron separating photocatalyst for dye sewage treatment is characterized by comprising: S1, dispersing attapulgite subjected to acid activation treatment in distilled water, adding a FeCl3 solution, a FeCl2 solution and a NaOH solution into the obtained dispersion liquid, and preparing the magnetic attapulgite by virtue of an in-situ synthetic method; and S2, mixing the magnetic attapulgite with octacarboxylic phthalocyanine aluminum and cobalt or derivatives of octacarboxylic phthalocyanine aluminum and cobalt, and preparing the magnetron separating photocatalyst for dye sewage treatment by virtue of an ultrasonic stirring method. The photocatalyst prepared not only has obvious dye degradation effect, but also can be recycled through a magnetic separation technology.

Description

technical field [0001] The invention relates to a controllable magnetic separation photocatalyst for dye sewage treatment and a preparation method thereof. The photocatalyst prepared by the invention not only has obvious dye degradation effect, but also can realize recycling by magnetic separation technology. Background technique [0002] In recent years, with the continuous development of industrial technology, more and more dyes have been used in textiles, plastics, food, pharmaceuticals and other fields, which has led to serious dye sewage pollution problems worldwide. Furthermore, most of the dyes used in the textile industry are toxic and highly carcinogenic. Therefore, how to remove dye pollution from industrial wastewater has become an important and urgent issue. In order to solve this problem, Advanced Oxidation Processes (AOPs) have continuously developed into one of the effective technologies because of their efficient degradation of organic pollutants. Among th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28C02F1/32
Inventor 陈大俊袁智成蓝野陈思喻
Owner DONGHUA UNIV
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