Method for preparing SO42-/TiO2 through supercriticalo exsiccation

A supercritical drying, sulfuric acid technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of decreased catalytic activity, shedding of catalyst surface, unusable catalyst, etc., and achieves long service life, The effect of high photocatalytic activity
CN1562478AInactive Publication Date: 2005-01-12SHANGHAI NORMAL UNIVERSITY
0 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI NORMAL UNIVERSITY
Publication Date
2005-01-12
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

A process for preparing the catalyst SO4 / TiO2 by supercritical drying method includes slowly dropping the sulfuric acid-alcohol-water solution in butyl titanate-alcohol solution to obtain TiO2 sol, ageing to obtain wet gel, mixing it with alcohol, staying in inertial atmosphere and supercritical condition for 0.5-8 hr, cooling and calcining. Its adantages are high specific surface area and photocatalytic activity, and long service life.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a kind of SO 4 2- / TiO 2 A method for preparing a photocatalyst, in particular a method for preparing the photocatalyst under supercritical conditions. Background technique

[0002] In recent years, the use of semiconductor photocatalysts to treat various pollutants in the environment has attracted worldwide attention, and photocatalytic degradation of organic matter is of great significance in environmental governance. TiO 2 With its advantages of non-toxicity, high catalytic activity, good chemical stability, cheap and easy to obtain, and direct use of sunlight, it has attracted people's attention, and has become a typical photocatalyst. 2 The general method of photocatalyst is to use Sol-gel method to prepare the catalyst precursor state, then heat treatment, then direct drying and high temperature calcination to obtain ultrafine TiO 2 particles. The disadvantage of the direct heating method is that the sample ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More