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Preparation of magnetic ferroferric oxide-zinc oxide composite photocatalyst with octahedral structure and product and application thereof

A technology of triiron tetroxide and octahedron, which is applied in metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc. It can solve the problem that the light absorption range is limited to the ultraviolet region, The powder catalyst is difficult to separate and recycle, and the photogenerated carrier life is short, so as to achieve the effect of enhancing electron transport ability, facilitating catalytic efficiency and excellent photocatalytic performance

Active Publication Date: 2021-03-30
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the current ZnO semiconductor photocatalytic material photogenerated carrier life is short, the light absorption range is limited to the ultraviolet region, the light energy utilization rate is low, and the powder catalyst is difficult to separate and recycle, etc., the purpose of the present invention is to provide an octahedral structure The preparation method of the magnetic iron ferric oxide-zinc oxide composite photocatalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A magnetic Fe3O4-ZnO composite photocatalyst with an octahedral structure, using the high specific surface area and adjustable pore structure of MOF materials, performing reduction treatment in a hydrogen-argon atmosphere to effectively retain its skeleton structure, combined with semiconductor ZnO , enhance the electron transport ability, the formed heterostructure can effectively avoid the recombination rate of photogenerated electrons and holes, and effectively improve the removal rate of the composite photocatalyst for refractory organic pollutants in water. It is prepared according to the following steps:

[0029] (1) Under magnetic stirring, according to Fe(NO 3 ) 3 ·6H 2 The molar ratio of O: terephthalic acid is 1:1 and Fe(NO 3 ) 3 ·6H 2 O and terephthalic acid were added to the DMF solvent for dissolution, and after complete dissolution, the terephthalic acid solution was added dropwise to the Fe(NO 3 ) 3 solution, ultrasonic treatment for 30 minutes, aft...

Embodiment 2

[0037] A kind of magnetic iron ferric oxide-zinc oxide composite photocatalyst with octahedral structure, similar to embodiment 1, is prepared according to the following steps:

[0038] (1) First, under magnetic stirring, according to Fe(NO 3 ) 3 ·6H 2 Fe(NO 3 ) 3 ·6H 2 O and terephthalic acid were added to the DMF solvent to dissolve, and after the dissolution was complete, the terephthalic acid solution was added dropwise to the Fe(NO 3 ) 3 In the solution, sonicate for 30 minutes, transfer the solution to a polytetrafluoroethylene reactor after being fully mixed, and adjust the reaction temperature and time to 110°C and 24h;

[0039] (2) Cool down to room temperature naturally after the reaction is over, and then dry the product in an oven after centrifugal washing. After removing the surface moisture, place it in a vacuum drying oven to dry to obtain octahedral MIL-101(Fe );

[0040] (3) Place the product obtained in (2) in 5% H 2 Carry out calcination under / Ar a...

Embodiment 3

[0045] A kind of magnetic iron ferric oxide-zinc oxide composite photocatalyst with octahedral structure, similar to embodiment 1, is prepared according to the following steps:

[0046] (1) First, under magnetic stirring, according to Fe(NO 3 ) 3 ·6H 2 Fe(NO 3 ) 3 ·6H 2 O and terephthalic acid were added to the DMF solvent to dissolve, and after the dissolution was complete, the terephthalic acid solution was added dropwise to the Fe(NO 3 ) 3 In the solution, sonicate for 30 minutes, transfer the solution to a polytetrafluoroethylene reactor after being fully mixed, and adjust the reaction temperature and time to 110°C and 12h;

[0047] (2) Cool down to room temperature naturally after the reaction is over, and then dry the product in an oven after centrifugal washing. After removing the surface moisture, place it in a vacuum drying oven to dry to obtain octahedral MIL-101(Fe );

[0048] (3) Place the product obtained in (2) in 5% H 2 Carry out calcination under / Ar a...

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Abstract

The invention relates to preparation of a magnetic ferroferric oxide-zinc oxide composite photocatalyst with an octahedral structure and a product and application thereof. A metal organic framework structure and a semiconductor photocatalyst are compounded by adopting a solvothermal method, and adsorption sites are effectively increased by fully utilizing a high specific surface area and an adjustable pore structure of an MOF material. After being compounded with a semiconductor photocatalytic material ZnO, charge transfer of the heterojunction interface is facilitated, and compounding of photo-induced electrons and holes is inhibited so that the visible light response is expanded, and the photocatalytic degradation efficiency is improved. Besides, the composite photocatalyst has magnetism, is convenient to recycle, effectively solves the problem of difficult recovery of a powder catalyst, and has a good application prospect in treatment of industrial sewage.

Description

technical field [0001] The invention relates to the preparation, product and application of a magnetic ferric iron tetroxide-zinc oxide composite photocatalyst with an octahedral structure, which can effectively improve the catalytic degradation efficiency of organic pollutants in water and is used in the field of sewage treatment. Background technique [0002] Bisphenol A is a derivative of phenol and acetone, and is the main raw material for the production of various polymer materials. Bisphenol A is widely distributed in the environment, which is easy to cause endocrine disruption and is harmful to human health. At present, the commonly used removal methods of bisphenol A in water include: membrane separation method, biological method, adsorption method and advanced oxidation method, etc. As an efficient, energy-saving and environmentally-friendly water treatment technology among advanced oxidation technologies, photocatalytic oxidation technology can effectively decompo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J35/10B01J37/18B01J37/08C02F1/30C02F101/30C02F101/34
CPCB01J23/80B01J37/18B01J37/086C02F1/30C02F2101/30C02F2101/345C02F2305/10B01J35/39B01J35/33B01J35/61Y02W10/37
Inventor 崔大祥童琴赵昆峰蔡婷袁静
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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