Process for preparing nano titanium dioxide bentonite composite material

Abstract

The preparation process of nano composite titania / bentonite material includes the following steps: 1) adding water into sodium base or calcium base bentonite for expanding and shearing at high speed to obtain bentonite suspension; 2) adding TiCl2 into anhydrous alcohol via stirring and ageing to prepare transparent solution A; 3) dropping solution A into the mixed solution of glycerin and water in certain volume ratio via stirring and ageing to prepare transparent solution B; and 4) dropping bentonite suspension in certain amount into solution B while stirring, reacting inside one high pressure reactor with PTFE lining at 80-200 deg.c for 1-15 hr, washing the discharged product until no Cl ion and drying. The process is simple, practical and suitable for industrial production, and the product is a excellent photocatalyst.

Description

technical field

[0001] The invention relates to a preparation method of a catalytic material, in particular to a hydrothermal preparation method of a nano titanium dioxide bentonite composite material. Background technique

[0002] Nano-titanium dioxide bentonite composites have been widely used in catalytic reactions due to their good microporous structure and high thermal stability. In recent years, they have become a hot spot in the research of mineral materials at home and abroad. Nano-titanium dioxide bentonite composite material is a micro / mesoporous composite material obtained by introducing titanium dioxide precursors into clay sheets by ion exchange. It is characterized by porosity, large specific surface area, small interlayer titanium dioxide particles, and more Strong solid acid properties, etc., can be used as adsorbents, photocatalysts, and shape-selective solid acid catalysts in the fields of alkyl substitution, dehydrogenation, dehydration, esterification, an...

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