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A kind of ternary doped titanium dioxide and its preparation method and application

A titanium dioxide and anatase technology, applied in chemical instruments and methods, separation methods, chemical/physical processes, etc., can solve the problems of less reports on the effect of formaldehyde oxide, only about 60%, only about 50%, etc. Achieving the effect of enhanced capacity and photocatalytic degradation capacity

Inactive Publication Date: 2015-09-16
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many reports on visible light decolorization or photocatalytic degradation of organic dyes using binary co-doped nano-titanium dioxide (Gu Huiping, Liu Baochun, Bao Yijuan. Preparation and photocatalytic properties of vanadium nitrogen co-doped TiO2[J].Environmental Science and Technology, 2011,34(6G):89-91; Liu Lili, Chen Shougang, Sun Weiwei, Xu Fengzhen. Preparation and photocatalytic performance of nitrogen vanadium co-doped titanium dioxide, Modern Chemicals, 2011.6), but there are few reports on the effect of oxidation of formaldehyde under light conditions , the reported efficiency of nitrogen-iron-doped titanium dioxide UV photooxidation of formaldehyde is only about 50% (Song Li, Li Juan, Zhang Rong. Fe / N co-doped nano-TiO 2 Experimental study on photocatalytic degradation of indoor formaldehyde[J]. Trace Elements and Health, 2010,27(2):54-56); vanadium-silicon-doped titanium dioxide visible light oxidation efficiency of formaldehyde is only about 50%, ultraviolet light oxidation efficiency of formaldehyde is only Reached around 60% (Li Juan, Tan Keming, Chen Yongzhi, Hong Jun.V 5+ / TiO 2 -SiO 2 -Research on Preparation of GF Composite Photocatalyst and Formaldehyde Degradation, Environmental Science and Technology, Issue 12, 2012)

Method used

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  • A kind of ternary doped titanium dioxide and its preparation method and application
  • A kind of ternary doped titanium dioxide and its preparation method and application
  • A kind of ternary doped titanium dioxide and its preparation method and application

Examples

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Effect test

Embodiment 1

[0070] (1) At a stirring speed of 100r / min, add ethyl titanate to absolute ethanol, control the volume ratio of titanium source and absolute ethanol to 10:40, mix evenly to form a light yellow transparent solution, and then add urea , wherein the molar ratio of nitrogen atoms to titanium atoms is 14:100, forming a solution A;

[0071] (2) Weigh vanadium acetylacetonate according to the molar ratio of vanadium atom to titanium atom of 0.1:100, add it to the mixed solution of glacial acetic acid, absolute ethanol and high-purity water, and maintain the volume ratio of glacial acetic acid, high-purity water and absolute ethanol as 1:1:8, mix well to form solution B;

[0072] (3) Weigh ethyl silicate according to the molar ratio of silicon atoms to titanium atoms of 3:100, add silicon source and high-purity water to absolute ethanol, and maintain the volume ratio of silicon source, high-purity water and alcohol at 0.5:5: 40, and add glacial acetic acid to adjust the pH to 4-5, st...

Embodiment 2

[0079] (1) At a stirring speed of 300r / min, add ethyl titanate to absolute ethanol, control the volume ratio of titanium source and absolute ethanol to 20:40 and mix evenly to form a light yellow transparent solution, then add guanidine hydrochloride , wherein the molar ratio of nitrogen atom to titanium atom is 56:100, forming solution A;

[0080] (2) Weigh vanadium acetylacetonate according to the molar ratio of vanadium atom to titanium atom of 2:100, add it to the mixed solution of glacial acetic acid, absolute ethanol and high-purity water, and maintain the volume ratio of glacial acetic acid, water, and absolute ethanol as 3:1:8 mixed evenly to form solution B;

[0081] (3) Weigh ethyl silicate according to the molar ratio of silicon atoms to titanium atoms of 16:100, add silicon source and high-purity water to absolute ethanol, and maintain the volume ratio of silicon source, water, and alcohol at 2:5: 40, and add glacial acetic acid to adjust the pH to 5-6, stir at 60...

Embodiment 3

[0088] (1) At a stirring speed of 200r / min, add butyl titanate to absolute ethanol, control the volume ratio of titanium source and absolute ethanol to 15:40, mix evenly to form a light yellow transparent solution, and then add urea , wherein the molar ratio of nitrogen atoms to titanium atoms is 28:100, forming a solution A;

[0089] (2) Weigh ammonium metavanadate according to the molar ratio of vanadium atom and titanium atom as 1:100, and add it to the mixed solution of glacial acetic acid, absolute ethanol and high-purity water to maintain the volume ratio of glacial acetic acid, water, and absolute ethanol Mix evenly at 2:1:8 to form solution B;

[0090] (3) Weigh butyl silicate according to the molar ratio of silicon atoms to titanium atoms of 6:100, add silicon source and high-purity water to absolute ethanol, and maintain the volume ratio of silicon source, water and alcohol at 1:5: 40, and add glacial acetic acid to adjust the pH to 4-5, stir at 40r / min to form a so...

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Abstract

The invention discloses three-atom-doped titanium dioxide catalyst as well as a preparation method and application of the three-atom-doped titanium dioxide catalyst, belonging to the technical field of catalysis and indoor air pollution prevention and control. The three-atom-doped titanium dioxide is composed of titanium dioxide crystals comprising nitrogen atoms, vanadium atoms and silicon atoms, having a crystalline form of anatase or a mixed crystalline of anatase and rutile, and having a particle size being 2-20nm, wherein the molar ratio of nitrogen to vanadium to silicon to titanium is (14-56): (0.1-2): (3-16):100, the specific surface area is 70-90m<2> / g, the energy gap is 2.8-3.0ev, and the absorption wavelength is 380-500nm. According to the invention, based on the nitrogen-vanadium-doped titanium dioxide photocatalyst, three-atom-doped titanium dioxide photocatalyst is prepared by using a sol-gel method, the superficial area and pore volume of the product are improved, and the product has catalytic activity under visible light. The preparation method is simple, the reaction process is easy to control, and side reactions hardly occur.

Description

technical field [0001] The invention relates to the technical field of photocatalysis and indoor air pollution prevention and control, in particular to a ternary doped titanium dioxide catalyst and its preparation method and application. The catalyst catalyzes and oxidizes indoor formaldehyde at normal temperature and under visible light irradiated by ordinary fluorescent lamps. Background technique [0002] In recent years, indoor air pollution caused by building materials, interior decoration, modern household appliances and office materials has seriously threatened human health. With the increasingly stringent national environmental regulations and the improvement of public environmental awareness, the problems caused by indoor air pollution have received more and more attention. Common indoor gaseous pollutants include CO, formaldehyde, volatile organic compounds (VOCs), ammonia, SO 2 , NO x Wait. Formaldehyde is a colorless gas with a pungent odor. Long-term exposure...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/72
Inventor 王淑勤赵毅赵少鹏
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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