Preparation method of ZnFe2O4/ Ag3PO4 composite photocatalyst

A technology of znfe2o4 and composite light, which is applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of silver phosphate visible light catalytic activity and stability improvement, limited and incomplete ability to conduct photogenerated electrons, etc. problem, to promote electron transfer and free radical generation, facilitate rapid recovery and efficient utilization

Inactive Publication Date: 2015-03-25
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, such methods only increase the conduction speed of photogenerated electrons through the combination of silver phosphate and conductive materials to improve the photostability of silver phosphate. At the same time, due to their limited ability to conduct photogenerated electrons, they cannot effectively reduce the Solubility in water environment, it is difficult to greatly improve the visible light catalytic activity and stability of silver phosphate
From the perspective of catalyst recovery, there are still disadvantages of difficult and incomplete recovery.

Method used

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  • Preparation method of ZnFe2O4/ Ag3PO4 composite photocatalyst
  • Preparation method of ZnFe2O4/ Ag3PO4 composite photocatalyst
  • Preparation method of ZnFe2O4/ Ag3PO4 composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Weigh FeCl 3 ·6H 2 O solid 0.54g and ZnCl 2 Add 0.136g of solid to 50mL of ethylene glycol and stir evenly, then add 3.6g of NaAC and 1g of PEG and continue stirring until uniform. Transfer the mixed solution to a reaction kettle and react at 200°C for 10 hours to obtain ZnFe 2 o 4 nanospheres. Separation by magnetic separation, washing with deionized water and ethanol three times each, and vacuum drying at 50°C.

[0031] (2) Weigh 8.493g of silver nitrate solid and dissolve it in 250mL deionized water to make a silver nitrate solution with a concentration of 0.2M; 2 HPO 4 12H 2 17.907g of O solid (equivalent to 7.093g of disodium hydrogen phosphate) was dissolved in 250mL of deionized water to prepare a 0.2M disodium hydrogen phosphate solution.

[0032] (3) Weigh the ZnFe prepared in step (1) 2 o 4 Add 0.0482 g of nanospheres into 60 mL of deionized water, and sonicate for 60 min. Stir rapidly with a mechanical stirrer and add 3 mL of the disodium hydro...

Embodiment 2

[0037] (1) Weigh FeCl 3 ·6H 2 O solid 0.135g and ZnCl 2 Add 0.043g of solid to 50mL of ethylene glycol and stir evenly, then add 0.9g of NaAC and 0.25g of PEG and continue stirring until uniform. Transfer the mixed solution to the reaction kettle and react at 180°C for 8 hours to obtain ZnFe 2 o 4 nanospheres. Separation by magnetic separation, washing with deionized water and ethanol three times each, and vacuum drying at 50°C.

[0038] (2) Weigh 2.123g of silver nitrate solid and dissolve it in 250mL deionized water to make a silver nitrate solution with a concentration of 0.05M; 2 HPO 4 12H 2 O solid 4.476g (equivalent to disodium hydrogen phosphate 1.773g) was dissolved in 250mL deionized water to prepare a disodium hydrogen phosphate solution with a concentration of 0.05M.

[0039] (3) Weigh the ZnFe prepared in step (1) 2 o 4 Add 0.0241 g of nanospheres into 60 mL of deionized water, and sonicate for 60 min. Stir rapidly with a mechanical stirrer and add 1 mL ...

Embodiment 3

[0041] (1) Weigh FeCl 3 ·6H 2 O solid 1.08g and ZnCl 2 Add 0.272g of solid to 50mL of ethylene glycol and stir evenly, then add 7.2g of NaAC and 2g of PEG and continue stirring until uniform. Transfer the mixed solution to a reaction kettle and react at 200°C for 12 hours to obtain ZnFe 2 o 4 nanospheres. Separation by magnetic separation, washing with deionized water and ethanol three times each, and vacuum drying at 50°C.

[0042] (2) Weigh 12.74g of silver nitrate solid and dissolve it in 250mL deionized water to make a silver nitrate solution with a concentration of 0.3M; 2 HPO 4 12H 2 26.11 g of O solid (equivalent to 10.639 g of disodium hydrogen phosphate) was dissolved in 250 mL of deionized water to prepare a disodium hydrogen phosphate solution with a concentration of 0.3M.

[0043] (3) Weigh the ZnFe prepared in step (1) 2 o 4 Add 0.1928g of nanospheres into 60mL of deionized water, and sonicate for 60min. Stir rapidly with a mechanical stirrer and add 10...

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Abstract

The invention relates to a preparation method of a ZnFe2O4/ Ag3PO4 composite photocatalyst, belonging to the technical field of environmental material preparation. An ion exchange technique is adopted for the invention, and the preparation method comprises the steps of firstly, feeding FeCl3.6H2O solid and ZnCl2 solid into ethylene glycol, evenly stirring, then feeding sodium acetate (NaAC) and polyethylene glycol (PEG) into the mixture, continuously mixing, and carrying out a reaction to obtain ZnFe2O4 nanospheres; after that, feeding the ZnFe2O4 nanospheres into deionized water, rapidly stirring, dropwise adding a disodium hydrogen phosphate solution, carrying out a reaction, then dropwise adding a silver nitrate solution, stirring until reactants have a full reaction, washing the product, and then carrying out vacuum drying on the washed product to obtain the ZnFe2O4/Ag3PO4 composite photocatalyst. A composite visible light photocatalyst system is established; a heterogeneous structure system is established, so that the activity and the stability of silver phosphate can be improved; furthermore, the photocatalyst can be efficiently recovered by using the ZnFe2O4; the composite photocatalyst has a better degrading effect for the antibiotics in waste water.

Description

technical field [0001] The present invention relates to a kind of ZnFe 2 o 4 / Ag 3 PO 4 The invention discloses a method for preparing a composite photocatalyst, belonging to the technical field of environmental material preparation. Background technique [0002] In recent years, the rapid development of the pharmaceutical industry has brought a leap forward to human civilization. At the same time, the pollution of the environment by the wastewater discharged in the production process is also increasing, which poses a serious threat to human health. As a new oxidation technology, photocatalysis has received extensive attention and research from a large number of scholars. Most of the traditional photocatalysts can only absorb ultraviolet light, such as titanium dioxide, strontium titanate and so on. But ultraviolet light accounts for only 4 percent of the total solar light, compared with 43 percent for visible light. Therefore, the development of efficient photocatalys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185
Inventor 赫明闫永胜逯子扬霍鹏伟
Owner JIANGSU UNIV
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