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Method for preparing nitrogen-doped titanium dioxide photocatalyst through electron beam irradiation

A technology of electron beam irradiation and titanium dioxide, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of high cost, long preparation time, complicated process, etc., and achieve good crystallization and low cost. The effect of low cost and simple process

Inactive Publication Date: 2014-11-05
SHANGHAI UNIV
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Problems solved by technology

[0004] At present, the methods of titanium dioxide nitrogen doping mainly include hydrolysis method, gas phase infiltration method, sol-gel method, mechanochemical method, vapor phase deposition method, etc., all of which have complex process, long preparation time, high cost, and high temperature in the preparation process. Disadvantages such as high pressure

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  • Method for preparing nitrogen-doped titanium dioxide photocatalyst through electron beam irradiation
  • Method for preparing nitrogen-doped titanium dioxide photocatalyst through electron beam irradiation
  • Method for preparing nitrogen-doped titanium dioxide photocatalyst through electron beam irradiation

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Embodiment

[0019] First, prepare titanium dioxide according to the existing known technology (for this technical method, please refer to the literature: Chem. Commun., 2012, 18, 4250-4252.)

[0020] 1. Preparation of titanium dioxide

[0021] A certain amount of octadecylamine (C 18 h 39 N) Add to absolute ethanol, then add deionized water, and mix uniformly at room temperature to obtain solution A. In addition, a certain amount of tetra-n-butyl titanate (C 16 h 36 o 4 Ti) was added into absolute ethanol, and ultrasonically mixed to obtain solution B. Mix solution B and solution A evenly, transfer to the reaction kettle, 170 o C for 20 hours; after the reaction, the reaction solution was naturally cooled to room temperature; then centrifuged to obtain a solid sample; then the sample was repeatedly washed with absolute ethanol and deionized water. Wash the samples at 60 o C under vacuum. Finally, dry the sample at 350 o C and calcined for 3 hours to obtain titanium dioxi...

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Abstract

The invention relates to a method for preparing a nitrogen-doped titanium dioxide photocatalyst through electron beam irradiation. The method comprises the following steps: preparing titanium dioxide by adopting a current known technology, adding titanium dioxide powder into a urea solution, and stirring the mixture at the room temperature for 24 hours; placing a suspension into an electron beam generating device to allow the suspension to undergo a certain dose of electron beam irradiation, wherein the radiation dose is 70-280kGy; and centrifugally separating the radiated suspension, and washing and drying an obtained solid sample to obtain the nitrogen-doped titanium dioxide photocatalyst finally. As proved by detection, the obtained nitrogen-doped titanium dioxide photocatalyst has high visible-light catalytic activity. Moreover, X-ray photoelectric spectroscopy (XPS) detection shows that nitrogen elements replace oxygen lattices and are doped into the titanium dioxide, and the doping amount is 7.41 percent.

Description

technical field [0001] The invention relates to a method for titanium dioxide photocatalyst, in particular to a method for preparing nitrogen-doped titanium dioxide photocatalyst by electron beam irradiation. Background technique [0002] Photocatalysis is expected to develop into a new green pollution control technology that directly utilizes sunlight and oxygen in the air to degrade toxic and harmful pollutants. Titanium dioxide has the advantages of high photocatalytic activity, stable chemical properties, non-toxic and odorless, and low cost. It is the photocatalyst with the most development potential and the most research. However, the forbidden band width of anatase titanium dioxide is 3.2 eV, and its corresponding absorption wavelength is 387.5 nm. also limits the TiO 2 Indoor application of photocatalytic technology. Therefore, the development of modified titanium dioxide photocatalysts with visible light activity is the key to improving the utilization rate of so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J37/34C02F1/30
CPCY02W10/37
Inventor 程伶俐阮仲英王宇佳张少锋崔海涛焦正丁国际
Owner SHANGHAI UNIV
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