Process for degrading wastewater through N-doped coated TiO2 photocatalyst

A photocatalyst and encapsulation technology, which is applied in the direction of physical/chemical process catalyst, special compound water treatment, light water/sewage treatment, etc., can solve the problems of unsystematic research on degradation process, doping modification, etc., and achieve improvement Visible light catalytic efficiency, mild reaction conditions, and the effect of improving the specific surface area

Active Publication Date: 2018-05-04
博兴瑞峰新材料有限公司
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Problems solved by technology

[0006] In recent years, Mao et al. used a breakthrough hydrogenation method to prepare a sheet of disordered nano-TiO 2 , TiO prepared by this method 2 The bandgap width is only 1.54eV, which has excellent visible light absorption performan

Method used

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  • Process for degrading wastewater through N-doped coated TiO2 photocatalyst

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Example Embodiment

[0030] Example 1

[0031] 1. Disordered nano-encapsulated TiO 2 Preparation:

[0032] a, TiO 2 And NaBH 4 Mix and grind for 0.5h to obtain a mixture, the TiO 2 With NaBH 4 The mass ratio is 1:0.65;

[0033] b. Move the mixture obtained in step a into an alumina crucible, and then place it in a tube furnace. In a nitrogen atmosphere, the temperature is increased from room temperature to 350°C at a rate of 10°C / min, and maintained under this condition for 0.5h, and then The furnace is cooled to room temperature to obtain reacted powder;

[0034] c. Move the powder obtained in step b into an alumina crucible, and then place it in a tube furnace. In an argon atmosphere, the temperature is increased from room temperature to 400°C at a rate of 10°C / min, and maintained under this condition for 0.5h, then Cool to room temperature with the furnace, wash and dry with ethanol and water several times to obtain powder A after reaction;

[0035] d. Combine the powder A obtained in step c with NaBH ...

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Abstract

The invention discloses a process for degrading wastewater through an N-doped coated TiO2 photocatalyst. The adopted visible-light-induced photocatalyst is an N-doped disordered nano coated TiO2 photocatalyst. According to the catalyst, disordered nano coated TiO2 with a thin multi-layer core-shell structure is prepared first, N is doped in situ in crystal lattices, and due to the structural specificity and doping of the element N, photocatalytic degradation activity of TiO2 on organic dyes is improved. According to the process disclosed by the invention, the problem in the prior art that dyestuff wastewater is low in degradation efficiency is solved, and the process is applicable to organic dyes in contaminated water.

Description

technical field [0001] The invention relates to a treatment process for photocatalytic degradation of dye wastewater, which uses N-doped disordered nano-encapsulated TiO 2 Photocatalyst, the special structure of the photocatalyst and the N element in TiO 2 Interlattice doping significantly enhances the TiO 2 The visible light catalytic activity of the photocatalyst has the advantages of simple operation, low cost and high degradation efficiency. Background technique [0002] In the process of textile printing and dyeing, a large number of auxiliaries that pollute the environment and are harmful to the human body are used. Most of these auxiliaries are discharged in the form of liquid, which inevitably enters the water environment and causes water pollution. For example, Rhodamine B dyes are carcinogenic and mutagenic. Wastewater containing Rhodamine B has deep chroma, high content of organic pollutants, and poor biodegradability. It is difficult to treat with conventional ...

Claims

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Application Information

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IPC IPC(8): C02F1/30B01J27/24C02F101/30C02F101/34C02F101/36C02F101/38
CPCB01J27/24B01J35/004C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2101/40C02F2305/10
Inventor 延海平
Owner 博兴瑞峰新材料有限公司
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