Preparation method and application of high-active-dispersibility nanometer titanium dioxide

A nano-titanium dioxide, dispersive technology, applied in chemical instruments and methods, water pollutants, chemical/physical processes, etc., can solve problems such as easy deactivation, easy agglomeration, uneven particle dispersion, etc., to achieve convenient operation and catalytic activity High and simple synthetic process

Inactive Publication Date: 2012-09-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the invention is to overcome current nano-TiO 2 In the preparation process, there are problems of uneven particle dispersion, easy agglomeration, and easy deactivation, and a method for preparing high-activity water-dispersible nano-TiO at low temperature is provided. 2 Methods

Method used

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  • Preparation method and application of high-active-dispersibility nanometer titanium dioxide
  • Preparation method and application of high-active-dispersibility nanometer titanium dioxide
  • Preparation method and application of high-active-dispersibility nanometer titanium dioxide

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Embodiment 1

[0033] Prepare the alcohol solution A of titanium alkoxide with n-butyl titanate and isopropanol at a volume ratio of 1:0.35, and slowly add the solution A dropwise to the deionized aqueous solution B with a pH of 2 (adjusted by nitric acid) under stirring , the volume ratio of solution A to solution B is 1:6.1; then react at 80°C for 24h to obtain milky white water-dispersed anatase nano-TiO 2 .

[0034] figure 1 Prepare gained nanometer TiO for this embodiment 2 From the TEM and HRTEM images, it can be seen that the grain size is 9.5-11nm. figure 2 Prepare gained nanometer TiO for this embodiment 2 The X-ray diffraction pattern, its diffraction peaks are similar to those of anatase TiO 2 The standard spectrum peak (JCPDS no.03-065-5714) matches, indicating that the obtained product is anatase TiO 2 . Using the Scherrer formula to calculate the particle size at the diffraction peak (101), the average particle size is 10.3 nm, which is consistent with the TEM observatio...

Embodiment 2

[0036] Prepare an alcoholic solution A of titanium alkoxide with n-butyl titanate and ethanol at a volume ratio of 1:0.34, and slowly add the solution A dropwise to the deionized aqueous solution B with a pH of 1 (adjusted by nitric acid) under stirring. The volume ratio of A to solution B is 1:4.0; then react at 70°C for 36h to obtain milky white water-dispersed anatase nano-TiO 2 .

Embodiment 3

[0038] Prepare alcohol solution A of titanium alkoxide with isopropyl titanate and butanol at a volume ratio of 1:1.56, and slowly add solution A to deionized aqueous solution B with a pH of 3 (adjusted by nitric acid) under stirring. The volume ratio of solution A to solution B is 1:1.9; then react at 90°C for 72h to obtain milky white water-dispersed anatase nano-TiO 2 .

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Abstract

The invention discloses a preparation method and application of high-active-dispersibility nanometer titanium dioxide. The preparation method and the application solves the problem that a preparation process of the nanometer titanium dioxide is uneven in particle dispersion, easy to reunite, easy to be inactive and the like. The preparation method and the application promote titanium alcohol saline solution and build a hydrolysis-polycondensation system with water serving as primary solvent. The whole synthetic process is simple in process, convenient to operate, small in amplification effect influence, and capable of achieving scale production. Under the condition that no surface active agent is added, the prepared nanometer titanium dioxide can be evenly dispersed in the water, is good in stability and has high photocatalytic activity, and capability for degradation of organic pollutant is far higher than photochemical catalyst sale in the market at present.

Description

Technical field: [0001] The invention relates to a preparation method of highly active water-dispersible nano-titanium dioxide and its application in photocatalytic degradation of organic pollutants, belonging to the field of photocatalytic material preparation and photocatalytic application. Background technique: [0002] Nano titanium dioxide (TiO 2 ) has become a photocatalyst with the most application potential because of its advantages of strong oxidation, good acid and alkali resistance, stable chemical properties, non-toxic to organisms, and abundant sources. received extensive attention. [0003] Nano-TiO 2 In the process of photocatalytic oxidative degradation of organic pollutants, nano-TiO 2 Photocatalysts are a key part of the photocatalytic process. Nano-TiO 2 The activity of photocatalyst is a decisive factor for the practical application of photocatalytic oxidation technology. Nano-TiO 2 The catalytic activity of photocatalysts mainly depends on TiO 2 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/32B09C1/08C02F101/38
Inventor 冯杰荆洁颖李文英
Owner TAIYUAN UNIV OF TECH
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