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Preparation method of magnetically separable bismuth tungstate composite

A composite material, bismuth tungstate technology, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve insufficient light utilization, catalyst quantum efficiency Low cost, difficult photocatalyst recovery and reuse, etc., to avoid secondary pollution and simple synthesis method

Inactive Publication Date: 2019-01-01
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Insufficient utilization of visible light, low quantum efficiency of catalysts, and difficulty in recycling and reusing photocatalysts have become the main factors restricting the development of photocatalytic technology.

Method used

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  • Preparation method of magnetically separable bismuth tungstate composite
  • Preparation method of magnetically separable bismuth tungstate composite
  • Preparation method of magnetically separable bismuth tungstate composite

Examples

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specific Embodiment approach 1

[0013] The specific embodiment one: one, take a certain amount of iron acetylacetonate (C 15 h 21 FeO 6 ) was dissolved in ethanol (the molar ratio to iron acetylacetonate was 1000:1), and after fully stirring for 60 minutes, it was placed in a polytetrafluoroethylene-lined reactor and reacted at 180°C for 15 hours. After magnetic separation and ethanol cleaning, tetraoxide was obtained. Three iron nanoparticles; 2. Dissolve a certain amount of sodium tungstate and bismuth nitrate (the atomic ratio of bismuth and tungsten is 2:1) in a certain amount of ethylene glycol (the molar ratio of metal to metal is 100:1), and stir well for 1 , slowly drop sodium tungstate solution into bismuth nitrate ethylene glycol solution, stir and mix for 2 hours, move the mixed solution to a polytetrafluoroethylene-lined reaction kettle, and perform solvothermal reaction at 180°C for 15 hours, ethanol and deionized water After fully washing, calcined at 300°C for 3 hours to obtain bismuth tungs...

specific Embodiment approach 2

[0014] Specific embodiment two: one, take a certain amount of iron acetylacetonate (C 15 h 21 FeO 6 ) dissolved in ethanol (the molar ratio to iron acetylacetonate is 500:1), fully stirred for 30 minutes, placed in a polytetrafluoroethylene-lined reactor and reacted at 150 ° C for 20 hours, magnetically separated and washed with ethanol to obtain tetraoxide Three iron nanoparticles; 2. Dissolve a certain amount of sodium tungstate and bismuth nitrate (the atomic ratio of bismuth and tungsten is 2:1) in a certain amount of ethylene glycol (the molar ratio of the metal to the metal is 50:1), and stir thoroughly for 1 , slowly drop sodium tungstate solution into bismuth nitrate ethylene glycol solution, stir and mix for 1h, move the mixed solution to a polytetrafluoroethylene-lined reaction kettle, and conduct solvothermal reaction at 140°C for 20h, ethanol and deionized water After fully washing, calcined at 300°C for 3 hours to obtain bismuth tungstate nanoparticles; 3. Weigh...

specific Embodiment approach 3

[0015] Specific embodiment three: one, take by weighing a certain amount of iron acetylacetonate (C 15 h 21 FeO 6 ) was dissolved in ethanol (the molar ratio to iron acetylacetonate was 1000:1), and after fully stirring for 60 minutes, it was placed in a polytetrafluoroethylene-lined reactor and reacted at 200°C for 10 hours. After magnetic separation and ethanol cleaning, tetraoxide was obtained. Three iron nanoparticles; 2. Dissolve a certain amount of sodium tungstate and bismuth nitrate (the atomic ratio of bismuth and tungsten is 2:1) in a certain amount of ethylene glycol (the molar ratio of metal to metal is 100:1), and stir well for 1 , slowly drop sodium tungstate solution into bismuth nitrate ethylene glycol solution, stir and mix for 2 hours, move the mixed solution to a polytetrafluoroethylene-lined reactor, and conduct solvothermal reaction at 200°C for 5 hours, ethanol and deionized water After fully washing, calcined at 300°C for 5 hours to obtain bismuth tung...

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Abstract

The invention relates to a preparation method of magnetically separable recycling magnetic iron oxide (gamma-Fe2O3) / bismuth tungstate photocatalytic composite. With the synthesized ferrosoferric oxideand bismuth tungstate as raw materials, the composite is prepared by the processes of polyethylene glycol mixing, oxidation and the like; the composite has the advantages of high magnetic separationefficiency, photocatalysis reusing and the like. The preparation method comprises the following steps: (I) synthesizing ferrosoferric oxide and bismuth tungstate nanoparticles by a solvothermal process respectively; (II) adding polyethylene glycol, and uniformly mixing the ferrosoferric oxide and bismuth tungstate nanoparticles in an aqueous solution; (III) performing magnetic separation, sufficiently washing and drying at 80 DEG C; (IV) calcining the sample for 4 hours in air at 350 DEG C, wherein the ferrosoferric oxide is oxidized into gamma-Fe2O3, and a magnetically separable recycling magnetic gamma-Fe2O3 / bismuth tungstate photocatalytic composite is obtained finally. The photocatalytic composite has the advantages of easiness in preparation process and recyclability.

Description

technical field [0001] The invention relates to a magnetically separated and recycled gamma iron oxide (γ-Fe 2 o 3 ) / bismuth tungstate photocatalytic composite material and its preparation method have the advantages of easy magnetic separation and recyclable utilization. Background technique [0002] The abuse and resistance of antibiotics in animals has become one of the major problems in the field of public health worldwide. Doctors are faced with problems such as fewer and fewer choices and insufficient time to make decisions. They are often confronted with the pain of how to save the lives of patients. Haunted by choice. [0003] Photocatalytic technology is an environmental control technology that uses sunlight, has no secondary pollution, and can completely decompose organic pollutants such as antibiotics. Its development for more than 30 years has attracted more and more attention from scientific researchers, but in general, photocatalytic technology is still in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/843C02F1/30C02F101/36
CPCC02F1/30B01J23/8437C02F2101/36B01J35/39B01J35/33
Inventor 王新庆魏俊麒毛佳楠王攀峰徐靖才金顶峰彭晓领洪波金红晓葛洪良
Owner CHINA JILIANG UNIV
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