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Magnetic composite photocatalyst as well as preparation method and application thereof

A composite light and catalyst technology, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as poor stability, easy degradation of photocatalytic performance, and restrictions on the practical application of photocatalytic technology. Simple and convenient effect of rapid solid-liquid separation, separation recovery and reuse

Inactive Publication Date: 2016-08-24
CHANGSHA UNIVERSITY
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Problems solved by technology

However, solid-liquid separation of nanocatalysts is difficult, and Ag 3 PO 4 Poor stability in water leads to easy degradation of photocatalytic performance, which limits the practical application of photocatalytic technology in water treatment

Method used

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Embodiment 1

[0035] A kind of magnetic composite photocatalyst of the present invention, this magnetic composite photocatalyst uses Fe 3 o 4 Nanoparticles as the core, Fe 3 o 4 Nanoparticles coated with SiO 2 Inert layer, SiO 2 The surface of the inert layer is enriched with Ag 3 PO 4 , Ag 3 PO 4 The surface is modified with AgCl.

[0036] A kind of preparation method of the magnetic composite photocatalyst of above-mentioned present embodiment, comprises the following steps:

[0037] (1) Preparation of Fe 3 o 4 nanoparticles

[0038] (1.1) Weigh 2.7g FeCl 3 ·6H 2 O and 4.1 g NaAc 3H 2 O was dissolved in 80mL of ethylene glycol, stirred thoroughly to dissolve, and a mixed solution was obtained.

[0039] (1.2) Put the mixed solution obtained in step (1.1) into a 100mL hydrothermal reactor, then heat it in an oven to 180°C for 24h, and then cool it down to room temperature.

[0040] (1.3) Pour the reaction product in the hydrothermal reaction kettle into a beaker, through mag...

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Abstract

The invention discloses a magnetic composite photocatalyst as well as a preparation method and an application thereof. The magnetic composite photocatalyst adopts a Fe3O4 nanoparticle as a core, the surface of the Fe3O4 nanoparticle is coated with a SiO2 inert layer, Ag3PO4 is enriched on the surface of the SiO2 inert layer, and the surface of Ag3PO4 is modified with AgCl. The preparation method of the magnetic composite photocatalyst comprises steps as follows: preparing Fe3O4-SiO2 carriers, preparing Fe3O4-SiO2@Ag3PO4 and preparing Fe3O4-SiO2@Ag3PO4 / AgCl. The magnetic composite photocatalyst can be applied to treatment of antibiotic wastewater and has the advantages of high visible light utilization rate, convenient recycling, stable photocatalytic performance and high antibiotic degradation efficiency.

Description

technical field [0001] The invention belongs to the field of antibiotic wastewater treatment, and in particular relates to a magnetic composite photocatalyst and a preparation method and application thereof. Background technique [0002] With the development of society and the continuous improvement of human material needs, antibiotics are widely used in the treatment of human diseases and the treatment and prevention of bacterial diseases in livestock, poultry and aquatic products. Their extensive use worldwide leads to their continuous accumulation in the environment. Antibiotic pollution is likely to become one of the factors that endanger public health, and people need to pay great attention to it. Therefore, it is of great significance to explore effective restoration and treatment measures. [0003] Due to the antibacterial effect of antibiotics, the traditional biological treatment technology needs to add a pretreatment unit to reduce the biological toxicity when trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C02F1/30C02F1/72C02F103/34
CPCC02F1/30C02F1/725B01J27/1853C02F2103/343C02F2305/10B01J35/396B01J35/33B01J35/39Y02W10/37
Inventor 罗琨张世英李雪庞娅廖兴盛雷敏王丽平杨珊
Owner CHANGSHA UNIVERSITY
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