Preparation method of titanium-based catalyst and formaldehyde removal method using titanium-based catalyst
A catalyst, titanium-based technology, used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low efficiency, secondary pollution, and high catalyst cost
Inactive Publication Date: 2017-03-15
JIAXING XINGTIAN ENVIRONMENTAL PROTECTION TECH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to improve the conductivity and catalytic activity of titanium dioxide nanotubes, and apply them to the removal of VOCs, so as to overcome the shortcomings of existing catalysts such as high cost, low efficiency, and easy to cause secondary pollution.
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Embodiment 1
[0033] The industrial flexible titanium wire is used as the base, cut 40cm long and artificially wound into a spiral shape, and after ultrasonic pretreatment for 30 minutes in acetone, ethanol, and ultrapure water, it is used as the anode, and the platinum sheet is used as the cathode. Under the action of 30V DC voltage, Oxidation in 37.83mL dimethyl sulfoxide and 2.17mL hydrofluoric acid solution for 8 hours to obtain amorphous titanium dioxide nanotubes, calcined at 500 ° C for 4 hours to obtain TiO with good crystallinity 2 NTs; prepare a citric acid-sodium citrate system buffer solution with pH=6, then weigh a certain mass of dry graphite oxide into the above buffer solution, and stir to obtain a concentration of about 0.3mg mL -1 Graphene oxide colloidal dispersion. Using the graphene oxide dispersion as the electrolyte, the graphene oxide was reduced and deposited onto TiO by cyclic voltammetry. 2 On the nanotube substrate, rGO-TiO 2 array of nanotubes. The electrodep...
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Abstract
The invention discloses preparation method of a titanium-based catalyst. The preparation method of the titanium-based catalyst is used in photocatalytic oxidation treatment of VOCS (volatile organic chemicals), and includes: first obtaining a directionally grown titanium dioxide nanotube array TiO2NTs through an anodizing method, depositing graphene on the surface of the titanium dioxide nanotube array TiO2NTs so as to overcome the defects that quantum efficiency of titanium dioxide is low, electrical conductivity of the titanium dioxide is poor and the like, and preparing Cu2O / rGO / TNTs composite material good in crystallization, high in catalytic activity and stable on a graphene-TiO2NTs substrate. The prepared composite material is used as the catalyst, and successfully oxidizes volatile organic vapor into low molecular weight organic matters of CO2, H2O and the like, and the composite material has good heat resistance, stability and high catalytic activity. The preparation method of the titanium-based catalyst is low in operation cost, simple and quick, easy to control, and green and free from pollution, and due to the fact that the composite material has integrity, the composite material is convenient to recycle.
Description
technical field [0001] The invention relates to the field of proton exchange membrane fuel cells and energy conversion, in particular to a preparation method of a titanium-based catalyst and a formaldehyde removal method using the titanium-based catalyst. Background technique [0002] Volatile organic gases will seriously deteriorate the surrounding air environment, seriously disturb the daily life of residents around the factory area, and cause harm to human health and ecological environment. Therefore, the removal of VOCs has attracted the attention of the whole society. At present, traditional thermal destruction, absorption technology, activated carbon adsorption, and biological treatment technologies generally have problems such as high cost, harsh reaction conditions, difficult operation and maintenance, and some technologies may even cause secondary pollution. It can be carried out by pressing down, with high treatment efficiency, wide applicability, easy maintenance,...
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IPC IPC(8): B01J23/72B01D53/86B01D53/72
CPCB01D53/8668B01J23/72B01J37/348B01D2255/802B01D2257/708B01J35/39Y02C20/30
Inventor 姜文静刘辉何汉根王佳园沈智然富娟法
Owner JIAXING XINGTIAN ENVIRONMENTAL PROTECTION TECH CO LTD