Hierarchical red phosphorus incorporated TiO2 hollow sphere heterojunctions toward superior photocatalytic hydrogen production

Solar-to-hydrogen conversion through photocatalysis is a sustainable and promising strategy for storing solar energy. Recently, elemental red phosphorus (RP) with broad light absorption has been recognized as a potential candidate for photocatalytic hydrogen evolution, while challenges remain due to the rapid recombination of photogenerated carriers. In this work, RP modified TiO2 hollow spheres were designed and fabricated through the chemical vapor deposition method. The optimal hydrogen production rate reaching 215.5 mu molgg h) over TiO2@RP heterostructure was obtained under simulated solar light irradiation. Experimental results evidenced that the hollow sphere structure and RP light absorber extended light absorption ability, and the heterostructure induced interfacial charge migration facilitated photoinduced charge separation, which benefited the photocatalytic hydrogen production performance. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.

Automated summary

In this study, RP modified TiO2 hollow spheres were used for solar-to-hydrogen conversion. The optimal hydrogen production rate was achieved with the TiO2@RP heterostructure under simulated solar light irradiation. The hollow sphere structure and RP light absorber extended light absorption ability, and the heterostructure induced interfacial charge migration facilitated photoinduced charge separation, resulting in enhanced photocatalytic hydrogen production performance.