A floating red phosphorus-coated hollow glass microsphere photocatalyst for visible light-driven water splitting to produce hydrogen and its preparation method.

By depositing red phosphorus in situ on the surface of hollow glass microspheres to form a floating photocatalyst, the problems of low light utilization and mass transfer efficiency in the photocatalytic water splitting system are solved, achieving a highly efficient water splitting hydrogen production effect, and significantly improving catalyst stability and product separation effect.

CN122352301APending Publication Date: 2026-07-10BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING UNIV OF TECH
Filing Date
2026-04-03
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing photocatalytic water splitting systems suffer from limitations in light utilization, mass transfer and product desorption, as well as system stability and recovery difficulties. In particular, in liquid-phase suspension reactions, these issues affect both light energy utilization efficiency and product generation efficiency.

Method used

Hollow glass microspheres were used as a carrier, and red phosphorus was uniformly coated on their surface by in-situ vapor deposition to form a floating red phosphorus-coated hollow glass microsphere photocatalyst. This enabled the catalyst to float stably on the water surface and shorten the escape path of gaseous products, combined with visible light-driven reaction.

Benefits of technology

It significantly improves light energy utilization efficiency and mass transfer efficiency, enhances hydrogen production performance, has good gas product separation effect, is easy to recover catalyst, has high stability, and its hydrogen production performance is 5.6 times higher than that of traditional suspension liquid phase system.

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Abstract

A floating red phosphorus-coated hollow glass microsphere photocatalyst for visible light-driven water splitting to produce hydrogen, and its preparation method, belong to the field of photocatalytic materials and solar energy conversion technology. Lightweight hollow glass microspheres (HGMs) are selected as a low-density carrier. Red phosphorus is grown and uniformly coated on the surface of the microspheres through in-situ vapor deposition, thus obtaining a floating red phosphorus-coated hollow glass microsphere RP@HGMs photocatalyst. Under sacrificial agent-free conditions, the system of this invention can achieve spatial separation of reduction and oxidation products near the two-phase interface: the reduction product (hydrogen) can quickly enter the gas phase, while the oxidation product (hydrogen peroxide) mainly remains in the liquid phase, thereby reducing the probability of adverse reactions caused by product backmixing, promoting the continuous progress of the reaction, and improving the apparent reaction efficiency.
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