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Method for preparing nano titanium dioxide by sol process at low temperature

A technology of nano-titanium dioxide and titanium dioxide, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of high production cost, large energy consumption, long process, etc., and achieve equipment investment and production costs. Simple, reduced preparation steps effect

Inactive Publication Date: 2012-09-19
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the calcination process of xerogel consumes a lot of energy, the calcination temperature is not suitable for control, and the mixed structure is easy to appear, which is not conducive to mass production
Many reports at home and abroad are constantly improving the process of sol-gel, but they still cannot get rid of the high-temperature calcination process.
There are still disadvantages such as long process, high temperature, large energy consumption and high production cost.

Method used

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  • Method for preparing nano titanium dioxide by sol process at low temperature
  • Method for preparing nano titanium dioxide by sol process at low temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Prepare 25% titanium salt solution with absolute ethanol as solvent, stir and react at room temperature to form liquid A, stir for 3 hours, add liquid B consisting of 10ml absolute ethanol, 1ml dispersant, glacial acetic acid and deionized water, continue stirring for 3h A sol solution is formed. Standing and aging for 24 hours, drying into gel powder, calcining, grinding and sieving to obtain the product.

Embodiment 2

[0027] When the light yellow sol solution was prepared in Example 1, a certain amount of absolute ethanol was added, heated in a water bath to 80°C, a mixture of deionized water, absolute ethanol and ammonia water was added dropwise, and the water bath was refluxed for 4-12 hours. Static layering to remove the supernatant, wash twice with absolute ethanol and deionized water, and dry the precipitate. Grinding and sieving to obtain a low-temperature sol to prepare nano-scale titanium dioxide powder.

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PUM

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Abstract

The invention relates to a preparation method of a catalyst, particularly a method for preparing nano titanium dioxide by a sol process at low temperature, which comprises the following steps: by using titanium salt as a raw material, alcohol as an organic solvent and acid as a reaction inhibitor, stirring in a reactor at room temperature to react; after reacting for some time, obtaining a sol solution; and refluxing the sol solution in a water bath for some time, washing, separating, and drying to obtain the nano titanium dioxide powder. The nano titanium dioxide prepared by the sol-gel process does not need high-temperature calcination technology, has the advantages of good product quality, simple experimental operation steps, simple experimental facilities, easily controlled reaction steps and energy-saving preparation process, and is suitable for mass production, thereby being advanced technology for preparing nano materials by a sol-gel process.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing nano-titanium dioxide from low-temperature sol. Background technique [0002] With the advancement of science and technology and the improvement of human living standards, environmental pollution has become increasingly serious, and its environmental governance and industrial wastewater treatment have also attracted people's attention. In order to solve these problems, people have developed various catalysts and oxidants, due to the nano-TiO 2 It has the advantages of stable photochemical properties, high catalytic efficiency, strong oxidation ability, strong corrosion resistance, non-toxic and harmless, and low price, and has been widely concerned. It has been rapidly developed and paid attention to at home and abroad, and is used in the addition of coatings as a self-cleaning agent, a catalyst for wastewater treatment and an oxidant for various reacti...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82Y40/00
Inventor 李雪刘云义杨鹏飞
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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