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Preparation method of photocatalyst used for degrading organic pollutants

A technology of organic pollutants and photocatalysts, applied in catalyst activation/preparation, organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, etc. Small and other problems, to achieve the effect of simple preparation process, uniform distribution and wide application range

Inactive Publication Date: 2017-04-19
WUHAN TEXTILE UNIV
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  • Abstract
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Problems solved by technology

However, the preparation efficiency of this method is low and the catalytic range is small, and the catalytic efficiency can only be highlighted for strong oxidants such as Cr(VI)
Chinese Patent Publication No. CN105536765A, the publication date is May 4, 2016, and the name is "a shell-based boron-doped titanium dioxide composite photocatalyst and its preparation method". The process uses titanate as a precursor, boric acid and shell powder as Additives are used to prepare the initial reaction solution, and then through hydrothermal reaction, grinding and calcination, the obtained shell-based boron-doped titanium dioxide composite photocatalyst has the advantages of high activity and recyclability, but the preparation process is complicated, the efficiency is low, and it may bring secondary pollution

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  • Preparation method of photocatalyst used for degrading organic pollutants

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preparation example Construction

[0017] A kind of preparation method for degrading organic pollutant photocatalyst, described method is carried out as follows:

[0018] a. Place the base material in an organic solvent and ultrasonically clean it for 30-60 minutes, and then soak it in deionized water for 20 minutes to remove the residual solvent on the surface of the base material. The treated base material is dried with nitrogen and set aside; the organic solvent used One of methanol or ethanol or propanol or isopropanol or n-butanol or ether or acetone or butanone or chloroform.

[0019] b. Treat the cleaned matrix material obtained in step a with low-temperature corona irradiation for 5-10 minutes to obtain an activated matrix material, wherein the temperature of low-temperature corona irradiation is 10-45°C, and the temperature of low-temperature corona irradiation The voltage is 6-15KV, the distance of low-temperature corona irradiation is 0.5-3cm, and the matrix material used is a porous material or a se...

Embodiment 1

[0025] Put the carbon fiber in methanol for ultrasonic cleaning for 30 minutes, then soak it in deionized water for 20 minutes to remove the residual methanol on the surface of the carbon fiber, dry the treated carbon fiber with nitrogen, and set aside; the cleaned carbon fiber is treated with low-temperature corona irradiation for 5 minutes , to obtain activated carbon fibers, wherein the temperature of low-temperature corona irradiation is 10°C, the voltage of low-temperature corona irradiation is 6KV, and the distance of low-temperature corona irradiation is 0.5cm, and the activated carbon fibers are placed in atomic layer deposition equipment The reaction chamber is purged with nitrogen with a purity of 99.9999% for 3 minutes, the temperature of the chamber is controlled at 120°C, the pressure of the chamber is controlled at 50Pa, and then TiCl with a purity of more than 97% 4 Ti source, deionized water as oxygen source, TiCl 4 Heating to 60°C forms TiCl 4 The steam is th...

Embodiment 2

[0028] The microspheres were ultrasonically cleaned in ethanol for 40 minutes, and then soaked in deionized water for 20 minutes to remove the residual ethanol on the surface of the microspheres. The treated microspheres were dried with nitrogen and set aside; the cleaned microspheres were treated with low-temperature corona Irradiate for 6 minutes to obtain activated microspheres, wherein the temperature of low-temperature corona irradiation is 15°C, the voltage of low-temperature corona irradiation is 8KV, the distance of low-temperature corona irradiation is 0.8cm, and the activated microspheres Place in the reaction chamber of the atomic layer deposition equipment, and purging with nitrogen gas with a purity of 99.9999% for 5 minutes, the temperature of the chamber is controlled at 140 ° C, the pressure of the chamber is controlled at 60 Pa, and then titanium tetraisopropoxide with a purity greater than 97% is used as Titanium source, deionized water as the oxygen source, h...

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Abstract

The invention relates to a preparation method of a photocatalyst used for degrading organic pollutants and belongs to the technical field of catalyst preparation. The method is executed according to the following steps that a, a base material is cleaned and dried so that attachments on the surface of the base material can be removed, and then the surface of the base material is embellished through corona activation treatment; b, a functional nanometer TiO2 thin film is deposited on the surface of the activated base material by means of the atomic layer deposition technology, and a TiO2 functional nanocomposite is obtained; and c, the TiO2 functional nanocomposite is subjected to annealing treatment in the air atmosphere at 500-600 DEG C, and the photocatalyst used for degrading the organic pollutants is obtained. The preparation method aims at providing the photocatalyst which is large in specific surface area, high in catalytic activity, good in light transmission performance, capable of being recycled and wide in light response range, the preparation process is highly controllable, cost and the energy consumption are low, repeated use can be achieved, and pollution to the ecological environment is avoided.

Description

technical field [0001] The invention relates to a method for preparing a photocatalyst for degrading organic pollutants, and belongs to the technical field of catalyst preparation. Background technique [0002] With the continuous development and progress of the country, the domestic and industrial sewage produced is gradually increasing, especially the industrial wastewater has the characteristics of complex composition, high content of organic compounds, large biochemical oxygen demand, and refractory degradation. Therefore, purification treatment Technology has very important practical significance. Organic compounds are refractory pollutants, which can easily cause water eutrophication and environmental pollution. Among them, redox method, physical adsorption method, biodegradation and other methods have become one of the important ways to solve domestic and industrial sewage. To a certain extent, it solves pollution problems such as waste water and waste gas, but it ca...

Claims

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Application Information

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IPC IPC(8): B01J31/06B01J35/06B01J21/06B01J32/00B01J31/38B01J37/06B01J37/34C02F1/30C02F101/30C02F101/34C02F101/38
CPCC02F1/30B01J21/06B01J31/06B01J31/38B01J37/06B01J37/344C02F2305/10C02F2101/30C02F2101/34C02F2101/38B01J35/59B01J35/58B01J35/39
Inventor 陈凤翔杨辉宇徐卫林刘欣
Owner WUHAN TEXTILE UNIV