Rare-earth silica composite photocatalytic material and its preparation process and applications

The silica-rare earth composite photocatalytic material addresses the limitations of existing photocatalysts by enhancing adsorption and catalytic efficiency through a sol-gel process, enabling effective wastewater and air filtration even in low-light or dark environments.

FR3139732B1Active Publication Date: 2026-05-22JIANGXI KINGPOWDER TECH CO LTD
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Patent Information

Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
JIANGXI KINGPOWDER TECH CO LTD
Filing Date
2022-12-23
Publication Date
2026-05-22

AI Technical Summary

Technical Problem

Existing photocatalytic materials face challenges in maintaining catalytic activity under low-light or dark conditions, and long-remanent materials suffer from chemical instability and low water resistance, limiting their effectiveness in applications such as wastewater treatment and air filtration.

Method used

A silica-rare earth composite photocatalytic material is developed using a sol-gel process, combining silica with a long-lasting luminescent material and a photocatalytic material, enhancing adsorption and catalytic efficiency through high specific surface area and visible light transmittance, enabling autoluminescence and photocatalysis in low-light environments.

Benefits of technology

The composite material achieves efficient catalytic degradation of organic substances in wastewater and exhaust gases, providing prolonged catalytic activity and self-luminescence in dark conditions, extending the duration of photodegradation and improving treatment efficiency.

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Abstract

The present invention provides a silica-rare earth composite photocatalytic material and a method for its preparation and applications. It employs a sol-gel process to load a photocatalyst and a long-residual material onto the silica with a high specific surface area. This enhances the catalytic effect of the photocatalyst through efficient adsorption and high visible light transmittance of the silica, while simultaneously protecting the long-residual material with low water resistance and providing autoluminescence catalysis in low-light and dark outdoor environments. (See Fig. 4 for the abstract.)
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