Preparation method of nitrogen-doped modified zinc oxide visible-light photocatalyst
A zinc oxide and nitrogen doping technology, which is applied in the preparation and application of nanomaterials, can solve the problems of ineffective separation of photogenerated carriers and holes, limitations on the industrialization of pure ZnO semiconductor materials, and low utilization of light absorption. , to achieve the effects of broadening the absorption range, environmentally friendly process methods, and low cost
Active Publication Date: 2020-04-14
JILIN NORMAL UNIV
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Problems solved by technology
However, zinc oxide has a wide band gap, light absorption only in the ultraviolet region, low utilization rate of visible light absorption, ineffective separation of photogenerated carriers and holes, and expensive equipment for industrial production. Industrialization of limited pure ZnO semiconductor materials
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[0017] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0018] A preparation method of nitrogen-doped modified zinc oxide visible light catalyst, comprising the following steps:
[0019] (1), weigh 2.6774g zinc acetate dihydrate (Zn(CH 3 COO) 2 2H 2 O) solid, Zn(CH 3 COO) 2 2H 2 O was added to 30mL deionized water, stirred at room temperature for 30min at a speed of 500rpm, and dissolved completely to form solution A;
[0020] (2) Weigh 1.2617g of hexamethylenetetramine (abbreviation: HMTA) solid, add HMTA into solution A, stir at room temperature for 1 hour, and rotate at 500rpm, so that it dissolves to form solution B;
[0021] (3) After that, transfer the solution B to the autoclave, then put the autoclave into an oven at 95°C for 6 hours, cool it down to room temperature naturally, and perform centrifugation at 6000rpm for 6min, then discard The supernatant and sediment were washed with ...
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Abstract
The invention discloses a preparation method of a nitrogen-doped modified zinc oxide visible-light photocatalyst, and belongs to the technical field of preparation and applications of nano materials.According to the method, non-metallic element nitrogen is doped into a zinc oxide semiconductor, so that the surface defects of the zinc oxide semiconductor can be artificially introduced; and the nitrogen doping and the generation of the surface defects can effectively reduce the band gap of the zinc oxide semiconductor, and expand the spectral response of the zinc oxide semiconductor to a visible light region, so that the utilization rate of the zinc oxide semiconductor to visible light is improved. According to the invention, hexamethylenetetramine used in the method has two effects that the hexamethylenetetramine is a morphology control agent, and is further a nitrogen source required for preparing the nitrogen-doped modified zinc oxide, so that the method is simple, environment-friendly and high in catalytic efficiency; and the photocatalytic dye degradation performance of the catalyst is evaluated by adopting the ratio of the methyl orange concentration reduction value to the initial concentration in unit time, and the nitrogen-doped modified zinc oxide visible-light photocatalyst has potential application value in the aspect of dye degradation under the visible-light condition.
Description
technical field [0001] The invention belongs to the field of preparation and application of nanometer materials, and in particular relates to a preparation method of a nitrogen-doped modified zinc oxide visible light catalyst (N-ZnO). Background technique [0002] As people's requirements for living standards are getting higher and higher, petrochemical products have also penetrated into all aspects of human society development, and chemical products will inevitably cause many water pollutions in the process of development, production and use, which seriously threatens humans and animals. survival. To solve these problems, the use of semiconductor-based photocatalysts provides a reliable solution. Among many kinds of photocatalysts, zinc oxide (ZnO) is one of the most promising photocatalytic basic materials due to its advantages of non-toxic, odorless, tasteless, low cost and simple preparation process. However, zinc oxide has a wide band gap, light absorption only in the...
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IPC IPC(8): B01J27/24B01J23/06C02F1/30C02F101/30
CPCB01J27/24B01J23/06B01J35/004B01J35/0066C02F1/30C02F2101/308C02F2305/10
Inventor 孙德武翟宏菊李佳昕冯静东关壬铨
Owner JILIN NORMAL UNIV
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