Preparation method of catalytic self-cleaning functional ceramic membrane

By preparing nano-perovskite catalysts in situ on ceramic membranes and using persulfate solution to activate a chain reaction to clean contaminants in the pores of the ceramic membrane, the problem of ceramic membrane fouling was solved, achieving rapid and efficient cleaning and extending the membrane's service life.

CN116726730BActive Publication Date: 2026-06-19ZHEJIANG SCI-TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG SCI-TECH UNIV
Filing Date
2023-02-13
Publication Date
2026-06-19

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Abstract

This invention relates to the field of separation membrane material technology, specifically a method for preparing a catalytically self-cleaning functional ceramic membrane. This invention utilizes a sol-urea sacrificial method to prepare nano-perovskite catalysts in situ on the surface and pore walls of a ceramic membrane, constructing tens of thousands of "nanocatalytic PMS reactors" within the ceramic membrane pores. The nano-sized perovskite catalysts have a large specific surface area, resulting in a thousand-fold increase in the catalytic activation efficiency of PMS. This modification method not only improves the permeate flux of the ceramic membrane but also eliminates the need for acid-base chemical cleaning after membrane fouling, thus avoiding environmental pollution and preventing degradation of the ceramic membrane material and membrane modules.
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