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Production of nitrogen-doped anatase-type nanometer titanium dioxide

A nano-titanium dioxide, anatase-type technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., to achieve the effects of controllable grain size and high specific surface area of ​​nano-TiO2 powder

Inactive Publication Date: 2005-12-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology has problems with agglomeration and uniformity due to the high temperature process

Method used

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  • Production of nitrogen-doped anatase-type nanometer titanium dioxide
  • Production of nitrogen-doped anatase-type nanometer titanium dioxide
  • Production of nitrogen-doped anatase-type nanometer titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] With 1.3L deionized water as solvent, 0.25M industrial grade TiOSO 4 The solution is used as a precursor, 0.5M urea is added as a precipitating agent, 1.3L deionized water is added at 25°C, and they are dissolved by mechanical stirring. , kept at 110°C for 2h, then filtered with distilled water until Ba(NO 3 ) 2 The solution does not detect SO 4 2- After ionization, wash with absolute ethanol 5-8 times, and then dry in a water bath at 60°C for 12 hours.

Embodiment 2

[0018] With deionized water as] solvent, with 0.25M industrial grade TiOSO 4 The solution is used as a precursor, and 0.5M urea is added as a precipitating agent. The volume of the solution is 1.3L, and they are dissolved by mechanical stirring at 25°C. Insulate at 110°C for 24 hours, then filter with distilled water until Ba(NO 3 ) 2 The solution does not detect SO 4 2- After ionization, wash with absolute ethanol 5-8 times, and then dry in a water bath at 60°C for 12 hours.

Embodiment 3

[0020] Precursor industrial grade TiOSO 4 The concentrations of urea and precipitating agent are 0.25M and 0.5M respectively, add deionized water to make the solution volume 1.3L, add deionized water at 25°C, and dissolve them with mechanical stirring. , with a stirring speed of 300r / min, heat preservation at 110°C for 8 hours, and then filter with distilled water until the Ba(NO 3 ) 2 The solution does not detect SO 4 2- After ionization, wash with absolute ethanol 5-8 times, and then dry in a water bath at 60°C for 12 hours.

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Abstract

A process for preparing the nitrogen doped anatase-type TiO2 by hydrothermal synthesis includes such steps as proportionally mixing Ti source, precipitant, nitrogen source and water, loading in high-pressure reactor with teflon liner, hydrothermal reacting, alcohol washing, water washing, and drying.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide powder preparation, and in particular provides a method for preparing nitrogen-doped anatase-type nano-titanium dioxide, which is suitable for being used as a photocatalyst material. Background technique [0002] In 1972, Japanese scholars A.Fujishima and K.Honda in the n-type semiconductor TiO 2 The photoelectrocatalytic decomposition of water was found on the electrodes. Since then, nano-TiO 2 As a semiconductor photocatalyst, it has aroused increasing research interest in solar energy conversion and storage, degradation of harmful complex organic matter, etc. Photocatalyst is a catalyst that reacts under the participation of light. When TiO 2 is greater than that of TiO 2 When light with the width of the energy gap is irradiated, the internal electrons will be excited and interact with oxygen and water molecules in the air to generate negatively charged electrons and positively cha...

Claims

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Application Information

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IPC IPC(8): B01J21/06
Inventor 曹文斌李艳红冉凡勇张小宁韦祎
Owner UNIV OF SCI & TECH BEIJING
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