Method for preparing sodium metatitantate-potassium tetratitanate composite catalytic material by molten salt method

A technology of potassium tetratitanate and sodium metatitanate, applied in chemical instruments and methods, physical/chemical process catalysts, chemical elements of heterogeneous catalysts, etc., can solve the problems of high yield, high cost, and danger. , to achieve the effect of excellent catalytic performance, low cost and high product yield

Inactive Publication Date: 2018-10-09
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method has a high yield and can obtain whiskers with relatively large diameter lengths, but it needs to strictly control parameters such as temperature, alkalinity, and reaction time, and is costly and dangerous.

Method used

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  • Method for preparing sodium metatitantate-potassium tetratitanate composite catalytic material by molten salt method
  • Method for preparing sodium metatitantate-potassium tetratitanate composite catalytic material by molten salt method

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Embodiment

[0039] Example: Slowly mix 5ml of acetic acid solution with 2ml of tetrabutyl titanate under stirring, continue to stir for 30 minutes, carry out hydrothermal reaction at 150°C for 24h, and vacuum-dry the sample after centrifugation at 60°C to obtain TiO 2 Precursor samples.

[0040] Then TiO2 Precursor sample, NaNO 3 and KNO 3 Mix evenly at a mass ratio of 5:1:1, calcinate at 350°C for 4 hours, wash and dry thoroughly, and then the composite catalytic material of sodium metatitanate-potassium tetratitanate can be obtained.

[0041] Prepared sodium metatitanate-potassium tetratitanate composite catalytic material (see figure 1 ), which is nanoribbon-shaped, with smooth surface and clear edges and corners, with a length of about 6-13 microns and a width of about 200 nanometers (see figure 2 ).

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Abstract

The invention relates to a method for preparing sodium metatitantate-potassium tetratitanate composite catalytic material by a molten salt method through using mixed nitrate as a cosolvent, and belongs to the technical field of material preparation. Tetrabutyl titanate is used as raw materials; a TiO2 material precursor is prepared by a hydrothermal method; then, the mixed nitrate is used as the cosolvent; the sodium metatitantate-potassium tetratitanate composite catalytic material is prepared by a nitrate molten salt method. The method has the advantages that the preparation conditions are simple, convenient and controllable; the equipment and the process are simple; the yield is great; the cost is low, and the like. The obtained product is a nanobelt with the length being 6 to 13 microns and the width being about 200 nm; wide application prospects are realized in the aspects of photocatalysis degradation of contaminant, photocatalysis hydrogen production and the like.

Description

technical field [0001] The invention relates to a method for preparing a sodium metatitanate-potassium tetratitanate composite catalytic material by a melting method, and belongs to the technical field of material preparation. Background technique [0002] Titanate is a kind of semiconductor layered metal compound with high photocatalytic activity discovered so far. It has attracted extensive research attention because of its good photocorrosion resistance and high activity. The laminate framework of layered titanates is composed of octahedral TiO 6 They are connected to each other in a way of sharing edges or corners, and spread to form a negatively charged two-dimensional layered oxide, and the negatively charged layers contain alkali metal cations. Alkali metal cations have interlayer ion exchange performance, excellent adsorption performance and high chemical activity. In addition, the layered structure can maintain good stability during ion exchange, and can absorb ha...

Claims

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Application Information

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IPC IPC(8): B01J23/04
CPCB01J23/002B01J23/04B01J2523/00B01J35/39B01J35/40B01J2523/12B01J2523/13B01J2523/47
Inventor 赵增迎李晨曦彭志坚
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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