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Preparation method of Nano-TiO2 powder

A nano-titanium dioxide and powder technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of high process conditions, high cost, slow synthesis speed, etc., and achieve simple raw material requirements and fast synthesis speed , a wide range of effects

Inactive Publication Date: 2017-11-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods generally have the disadvantages of high requirements on process conditions, slow synthesis speed and high cost.

Method used

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  • Preparation method of Nano-TiO2 powder
  • Preparation method of Nano-TiO2 powder
  • Preparation method of Nano-TiO2 powder

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Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: a kind of preparation method of nano titanium dioxide powder, concrete steps are:

[0022] (1) Under stirring conditions, dissolve tetrabutyl titanate in triammonium citrate aqueous solution and mix evenly, let it stand still, take the lower clear liquid to obtain titanium clarified solution A; the concentration of triammonium citrate aqueous solution is 1mol / L, the mol ratio of tetrabutyl titanate and triammonium citrate in titanium clarified solution A is 1:1;

[0023] (2) Under the condition of stirring, adjust the pH value of the titanium clarified solution A to 8.0 with ammonia water, and then dissolve N-methylolacrylamide and N,N-methylenebisacrylamide in the titanium clarified solution A to obtain a mixed solution B; wherein the volume ratio of N-methylolacrylamide to titanium clarified solution A is 3:100, and the mass ratio of N,N-methylenebisacrylamide to N-methylolacrylamide is 1:3.

[0024] (3) Under stirring conditions, add ammonium persulfa...

Embodiment 2

[0027] Embodiment 2: a kind of preparation method of nano titanium dioxide powder, concrete steps are:

[0028] (1) Under stirring conditions, dissolve tetrabutyl titanate in triammonium citrate aqueous solution, mix evenly, let it stand, and remove the lower clear liquid to obtain titanium clarified solution A; the concentration of triammonium citrate aqueous solution is 1.1mol / L, the mol ratio of tetrabutyl titanate and triammonium citrate in titanium clarified solution A is 1: 1.1;

[0029] (2) Under stirring conditions, use ammonia water to adjust the pH of titanium clarified solution A to 9.0, then dissolve N-methylolacrylamide and N,N-methylenebisacrylamide in titanium clarified solution A to obtain a mixed solution B; wherein the volume ratio of N-methylolacrylamide and titanium clarified solution A is 5:100, and the mass ratio of N,N-methylenebisacrylamide and N-methylolacrylamide is 1:6.

[0030] (3) Under stirring conditions, add ammonium persulfate aqueous solutio...

Embodiment 3

[0033] Embodiment 3: a kind of preparation method of nano titanium dioxide powder, concrete steps are:

[0034] (1) Under stirring conditions, dissolve tetrabutyl titanate in triammonium citrate aqueous solution and mix evenly, let it stand still, take the lower clear liquid to obtain titanium clarified solution A; the concentration of triammonium citrate aqueous solution is 1.2mol / L, the mol ratio of tetrabutyl titanate and triammonium citrate in titanium clarified solution A is 1: 1.2;

[0035] (2) Under stirring conditions, adjust the pH value of titanium clarified solution A to 10.0 with ammonia water, then dissolve N-methylolacrylamide and N,N-methylenebisacrylamide in titanium clarified solution A to obtain a mixed solution B; wherein the volume ratio of N-methylolacrylamide to titanium clarified solution A is 7:100, and the mass ratio of N,N-methylenebisacrylamide to N-methylolacrylamide is 1:8.

[0036] (3) Under stirring conditions, add the ammonium persulfate aqueo...

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Abstract

The invention relates to a preparation method of Nano-TiO2 powder, and belongs to the technical field of nanometer powder. According to the invention, a polymer network gel method is adopted for preparing the Nano-TiO2 powder, precursor fluid is prepared from tetrabutyl titanate and triammonium citrate taken as raw materials; and N-hydroxymethyl acrylamide is taken as a monomer, N,N-methylenebis acrylamide is taken as a cross-linking agent, ammonium persulfate is taken as an initiator, tetramethylethylenediamine is taken as a catalyst, the pH value is controlled by a way of dropwise adding ammonia water, polymer network gel containing TiO2 is formed and dried, and then the nano-TiO2 powder is obtained through controlling the calcination temperature. The method disclosed by the invention has simple requirements for raw materials, and only requires water-soluble inorganic salts when the ions are doped to avoid the use of expensive metal alkoxide, and has the characteristics of simple process, high synthesis speed, wide application range and the like. The Nano-TiO2 powder prepared according to the method is high in purity and high in powder dispersibility.

Description

technical field [0001] The invention relates to a preparation method of nano-titanium dioxide powder, which belongs to the technical field of nano-powder preparation. Background technique [0002] In traditional industries, titanium dioxide is widely used in pigments, coatings, plastics, papermaking and other fields, and even added to food and cosmetics due to its non-toxic and harmless nature. With the deepening of research, many other excellent properties of titanium dioxide have been discovered , especially based on its unique properties as a semiconductor material, it has brought us new attempts to use sunlight to generate electricity, degrade pollutants, and split water to produce hydrogen. Nano-titanium dioxide is a material with excellent comprehensive performance. After various modifications, the effect on certain aspects is more prominent. In addition to traditional and mature applications, new functional titanium dioxide also shows its value in many aspects, such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y40/00
CPCC01G23/053C01P2004/03C01P2004/62C01P2004/64
Inventor 杜景红曹勇甘国友严继康
Owner KUNMING UNIV OF SCI & TECH