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Preparation method of Fe3O4@SiO2@ZnO magnetic nano photocatalyst

A photocatalyst and magnetic nanotechnology, applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of toxic dispersants or raw materials, poor solid-liquid separation effect, magnetic ZnO retention, etc. Achieve the effects of wide application range, excellent microwave heat transfer performance, and prevention of agglomeration

Inactive Publication Date: 2017-03-01
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current synthesis methods have problems such as energy consumption, time-consuming, toxic dispersants or raw materials, and the synthesized materials have poor stability, low photocatalytic activity and poor solid-liquid separation effect, which are problems that need to be solved urgently.
The exploration of magnetic ZnO by researchers at home and abroad mostly stays at the stage of degrading the dye solution, and there are few reports on the research and literature on the treatment of p-nitrophenol wastewater that is difficult to biodegrade, and further research and application are urgently needed

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  • Preparation method of Fe3O4@SiO2@ZnO magnetic nano photocatalyst
  • Preparation method of Fe3O4@SiO2@ZnO magnetic nano photocatalyst
  • Preparation method of Fe3O4@SiO2@ZnO magnetic nano photocatalyst

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Embodiment 1

[0053] Chapter 1 Preparation Method

[0054] a kind of Fe 3 o 4 @SiO 2 The preparation method of @ZnO magnetic nano photocatalyst comprises the following steps:

[0055] (1) Weigh 2.24g Zn(CH 3 COO) 2 2H 2 O was added to a portion of 100mL DEG solution, and ultrasonically assisted to dissolve for 10min, and then heated for 5min at a microwave power of 600W and a temperature of 150°C to obtain the first intermediate reaction solution;

[0056] (2) Weigh 0.2g Fe 3 o 4 @SiO 2 Add it into another 20mL DEG solution, and carry out ultrasonic-assisted dissolution for 10min, and then heat for 5min under the conditions of microwave power of 600W and temperature of 150°C to obtain the second intermediate reaction solution;

[0057] (3) mixing the first intermediate reaction liquid and the second intermediate reaction liquid, and then heating for 15 min under the conditions of microwave power of 600W and temperature of 160°C to obtain a mixed reaction liquid;

[0058] (4) After...

Embodiment 2

[0203] a kind of Fe 3 o 4 @SiO 2 The preparation method of @ZnO magnetic nano photocatalyst comprises the following steps:

[0204] (1) Zn(CH 3 COO) 2 2H 2 O: DEG = 2.0g: 90mL mixed, and ultrasonically assisted to disperse for min, then heated for 5min under the condition of microwave power of 550W and temperature of 145°C to obtain the first intermediate reaction solution; (2) according to the weight volume ratio of Fe 3 o 4 @SiO 2 : DEG=0.15g: 15mL mixed, and ultrasonically assisted dispersion for 10min, then heated for 5min under the conditions of 550W and 145°C in microwave power to obtain the second intermediate reaction solution; (3) in parts by volume, 90 1 part of the first intermediate reaction solution and 15 parts of the second intermediate reaction solution were mixed, and then heated for 15 minutes at a microwave power of 550W and a temperature of 155°C to obtain a mixed reaction solution; (4) the mixed reaction solution was cooled to room temperature, cent...

Embodiment 3

[0210] a kind of Fe 3 o 4 @SiO 2 The preparation method of @ZnO magnetic nano photocatalyst comprises the following steps:

[0211] (1) Zn(CH 3 COO) 2 2H 2 O:DEG=2.5g:110mL mixed, and ultrasonically assisted to disperse for 12min, and then heated for 8min under the conditions of 650W and 155°C in microwave power to obtain the first intermediate reaction solution; (2) Fe 3 o 4 @SiO 2 : DEG=0.25g: 20mL were mixed, and ultrasonically assisted to disperse for 12min, and then heated for 8min under the conditions of 650W and 155°C in microwave power to obtain the second intermediate reaction solution; (3) according to volume fraction, 110 One part of the first intermediate reaction solution and 25 parts of the second intermediate reaction solution were mixed, and then heated for 20 minutes under the condition of microwave power of 650W and temperature of 165°C to obtain the mixed reaction solution; (4) the mixed reaction solution was cooled to room temperature, centrifuged S...

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Abstract

A preparation method of a Fe3O4@SiO2@ZnO magnetic nano photocatalyst includes the steps of: 1) weighing 2.24 g of Zn(CH3COO)2.2H2O and adding the Zn(CH3COO)2.2H2O to 100 ml of a DEG solution with supersonic assistance for dissolution, and microwave-heating the solution to prepare a first intermediate reaction solution; 2) weighing 0.2 g of Fe3O4@SiO2 and adding the Fe3O4@SiO2 to 20 ml of a DEG solution with supersonic assistance for dissolution, and microwave-heating the solution to prepare a second intermediate reaction solution; 3) mixing the two intermediate reaction solutions and microwave-heating the solution to obtain a mixture reaction solution; and 4) cooling the mixture reaction solution to room temperature, performing centrifugal separation, and cleaning and drying the product. Compared with a photocatalyst in the prior art, the Fe3O4@SiO2@ZnO has stronger photocatalytic activity, better stability, and wider application range, and has advantage on reduction of secondary pollution due to excellent magnetic separation performance.

Description

technical field [0001] The invention relates to the field of catalyst preparation, specifically a Fe 3 o 4 @SiO 2 Preparation method of @ZnO magnetic nanophotocatalyst. Background technique [0002] Photocatalyst is a general term for chemical substances that can catalyze degradation under the excitation of photons, accelerate or slow down photochemical reactions, but do not participate in the reaction themselves. Under normal temperature conditions, materials whose conductivity is between that of conductors and insulators are called semiconductor materials. Semiconductor materials with certain photocatalytic degradation ability are called semiconductor photocatalysts. The synthesis method of magnetic ZnO is simple and fast, and has the characteristics of environmental protection, non-toxicity, low cost, high stability, strong photocatalytic activity and easy recycling. It can effectively remove organic pollutants that are difficult to biodegrade in water, and is an idea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80
CPCB01J23/80B01J37/0063B01J37/346B01J35/33B01J35/39
Inventor 张寒冰童张法唐艳葵覃岳隆宋振宇张蕾
Owner GUANGXI UNIV
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