Method for preparing mixed crystal nanometer titanium dioxide suspension from double precursors

A nano-titanium dioxide and suspension technology, applied in the field of materials, can solve the problems of complex operation, high production cost, and high equipment requirements, and achieve the effects of strong photocatalytic ability, low cost of finished products, and low equipment requirements

Inactive Publication Date: 2011-09-28
CHONGQING UNIV
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Problems solved by technology

However, the method is complicated to operate and requires high equipment
Most of the raw materials used in other prepara

Method used

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Embodiment Construction

[0021] The present invention uses titanium tetrachloride and titanium trichloride as raw materials, and through dissolution and dilution, chemical precipitation reaction, pH control, heating crystallization, filtration, and washing, a nano-titanium dioxide wet sample is prepared; then the nano-titanium dioxide synthesized above Wet samples are used as raw materials, a certain amount of deionized water is added, and ultrasonically dispersed to obtain a stable suspension of nano-titanium dioxide. Specific steps are as follows:

[0022] (1) Preparation of TiCl 4 solution and TiCl 3 the solution

[0023] Cool the deionized water to close to 0 °C, and pipette a certain amount of TiCl with a dry pipette 4 , using a dropping funnel to slowly add to deionized water in an ice-water bath with constant stirring to obtain colorless and transparent TiCl 4 Solution, the final constant volume titanium ion concentration is 0.5-1.0 mol / L, and store at 0°C for later use. Solvent deionized ...

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Abstract

The invention discloses a method for preparing mixed crystal nanometer titanium dioxide suspension from double precursors, which comprises the following steps of: (1) preparing TiCl4 solution and TiCl3 solution which have the titanium ion concentration of between 0.5 and 1.0 mol/L; (2) adding inorganic alkali solution into deionized water, adding mixed solution of the TiCl4 solution and the TiCl3 solution until the pH value of the solution is between 1.0 and 2.5, crystallizing at the constant temperature of between 50 and 100 DEG C for 2 to 10 hours to obtain a white precipitate product, and filtering and washing to obtain a nanometer titanium dioxide wet sample; and (3) diluting the nanometer titanium dioxide wet sample by adding the deionized water, and performing ultrasonic dispersion to obtain the mixed crystal nanometer titanium dioxide suspension. The method is simple, the equipment requirement is low, the photocatalytic capacity of titanium dioxide generated by reaction is high, and the prepared suspension is stable. In addition, the suspension is prepared by using the wet sample directly, so that agglomeration can be reduced and prevented; and the suspension is diluted by adding the water and can be dispersed uniformly without ultrasonic.

Description

technical field [0001] The invention relates to a method for preparing an inorganic material, in particular to a method for preparing a mixed crystal nano-titanium dioxide suspension with dual precursors, and belongs to the field of material technology. Background technique [0002] Since 1972, A.Fjishima and K.Hindan discovered the photocatalytic decomposition phenomenon of photo-splitting water on n-type semiconductor single crystal electrodes; in 1976, Canadian scientist Carey et al. used nano-titanium dioxide to degrade highly toxic polychlorinated biphenyls. Since the research, more scientific researchers have invested in the application research of using the photocatalytic properties of nano-titanium dioxide in environmental protection, and the heterogeneous photocatalytic technology has attracted the attention of researchers. TiO 2 Due to the advantages of high photocatalytic activity, good stability, non-toxic to human body, and low price, it stands out among man...

Claims

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Application Information

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IPC IPC(8): B01J21/06C01G23/053
Inventor 季金苟石朝辉徐溢王腾飞刘玮琦李静杰
Owner CHONGQING UNIV
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