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Silver phosphate composite photocatalyst with magnetism as well as preparation method and application thereof

A catalyst, composite light technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of no photocorrosion, difficult to recycle, expensive silver phosphate, etc., and achieve the degradation speed. Fast, high reusability, high photodegradation effect

Inactive Publication Date: 2018-10-26
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no efficient photocorrosion-resistant and renewable photocatalyst that can quickly and efficiently degrade organic pollutants such as dyes, antibiotics, and pesticides in the water environment.
[0003] The research results show that silver phosphate can be used as a photocatalyst to promote the degradation of organic pollutants. However, silver phosphate is expensive and difficult to recycle after treatment, which limits its industrial application. Low photocatalysts for catalytic degradation of organic pollutants in wastewater are of great significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1. Ag 3 PO 4 @Fe 3 o 4 The preparation process of -100 is as follows:

[0029] (1) Measure 35g of deionized water and place it in a 50mL centrifuge tube, weigh 100mg of magnetic iron material and add it to the 35g of deionized water, shake gently, and then sonicate in an ultrasonic device for 10min.

[0030] (2) Measure 10 g of deionized water and place it in a centrifuge tube, weigh 284 mg of disodium hydrogen phosphate and add it to 10 g of deionized water, shake until completely dissolved, and transfer the solution completely into the ultrasonicated solution (1). Tighten the cap of the centrifuge tube, and shake for 6 hours under the condition of 200 rpm in the dark. When the point is reached, the solution is completely transferred to a cleaned and dried Erlenmeyer flask.

[0031] (3) Measure 10 g of deionized water and place it in a centrifuge tube, weigh 1020 g of silver nitrate and add it to 10 g of deionized water, shake to dissolve it completely.

[0...

Embodiment 2

[0044] A variety of materials are used to photocatalytically degrade the dye rhodamine B in water. The photocatalysts are divided into 4 types. The first is silver phosphate, and the second is the Ag prepared in step 1 in Example 1. 3 PO 4 @Fe 3 o 4 -100, the third is the Ag prepared in step 2 in Example 1 2 S / Ag 3 PO 4 @Fe 3 o 4 -100, the fourth is magnetic iron. The dosage of several materials is 18mg, and the concentration of Rhodamine B in the test water is 10mg / L respectively. The results show that: after 30min adsorption equilibrium, silver phosphate can degrade 83% of rhodamine B, Ag 3 PO 4 @Fe 3 o 4 -100 can degrade 78% of Rhodamine B, Ag within 5min 2 S / Ag 3 PO 4 @Fe 3 o 4 -100 can degrade 94% of rhodamine B within 5min, while magnetic iron nanoparticles cannot degrade rhodamine B. This shows that the photocatalyst Ag prepared by the present invention 2 S / Ag 3 PO 4 @Fe 3 o 4 -100 has a higher photocatalytic degradation efficiency than silver phos...

Embodiment 3

[0046] When the exposure concentrations of methyl orange and methylene blue in 60mL water were 10mg / L respectively, the Ag prepared in step 2 in 18mg embodiment 1 was used 2 S / Ag 3 PO 4 @Fe 3 o 4 -100, shaking for 5 minutes under light can degrade more than 99% of methyl orange and methylene blue.

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PUM

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Abstract

The invention discloses a silver phosphate composite photocatalyst with magnetism as well as a preparation method and application thereof. The preparation method of the silver phosphate composite photocatalyst is characterized by taking silver nitrate, disodium hydrogen phosphate and magnetic iron as raw materials, regulating a mass ratio of all reagents and reacting, thus obtaining a nano composite material (Ag3PO4@Fe3O4-100) of a magnetic iron loaded Ag3PO4 thin film; finally gently modifying the Ag3PO4@Fe3O4-100 by using Na2S, thus preparing an Ag2S doped Ag3PO4 thin film loaded type magnetic photocatalyst (Ag2S / Ag3PO4-Fe3O4-100) which is fast, efficient and light corrosion-resistant, wherein the Ag2S / Ag3PO4-Fe3O4-100 is used for photocatalytic degradation on organic pollutants such asdye, antibiotics and insecticides in a water body. The silver phosphate composite photocatalyst disclosed by the invention has the advantages that the degradation speed of the organic pollutants in the water body is fast, the efficiency is high, separation and recovery are easy, and the silver phosphate composite photocatalyst can resist light corrosion, can be cyclically utilized for many times and has wide application value.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a magnetic, light-corrosion-resistant and reproducible photocatalyst for rapid and efficient photocatalytic degradation of organic pollutants such as dyes, antibiotics and insecticides in water, a preparation method and application thereof. Background technique [0002] With the development of modern industry, ensuring the safety of the water environment has become a difficult problem that needs to be overcome in environmental governance. Organic pollutants such as dyes, antibiotics, and pesticides have become the focus of governance. At present, there is no efficient photocorrosion-resistant and renewable photocatalyst that can quickly and efficiently degrade organic pollutants such as dyes, antibiotics, and pesticides in the water environment. [0003] The research results show that silver phosphate can be used as a photocatalyst to promote the degradation o...

Claims

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Application Information

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IPC IPC(8): B01J27/185C02F1/30C02F101/30C02F101/38
CPCC02F1/30B01J27/1853C02F2101/306C02F2101/308C02F2101/38C02F2101/40B01J35/33B01J35/39
Inventor 李灵香玉史恩王文婧张晓霞
Owner ZHEJIANG SCI-TECH UNIV
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