Qifu Yao
(, ), Ping Liu
(, ), Fei Yang
(, ), Yilin Zhu
(, ), Yagang Pan
(, ), Hongtao Xue
(, ), Weiwei Mao
(, ), Liang Chu
(, )
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Ferroelectric polarization in Bi0.9Dy0.1FeO3/g-C3N4 Z-scheme heterojunction boosts photocatalytic hydrogen evolution
Delivering excellent carrier separation through ferroelectric polarization is desirable to achieve effective solar hydrogen conversion. Here, Bi0.9Dy0.1FeO3/g-C3N4 (BDFO/GCN) Z-scheme photocatalyst was constructed by loading BDFO nanoparticles onto sheet-like GCN, in which BiFeO3 (BFO) was doped with the rare-earth element Dy to narrow the optical bandgap and enhance the ferroelectric property. Residual polarization effectively promoted the separation and transport of photo-generated carriers in BFO, and the Z-scheme exhibited stable reaction activity during photocatalytic degradation and photocatalytic hydrogen evolution. Through electric polarization, the heterojunction photocatalyst achieves 100% degradation of Rhodamine B (RhB) under simulated sunlight. The evolution rate of hydrogen was improved from approximately 742.5 to 1084.0 µmol·g−1·h−1 after polarization. This remarkable activity is attributed to the improved carrier separation facilitated by the internal polarization field. This work offers novel insights into the rational design of efficient ferroelectric photocatalysts.
期刊介绍：
Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.
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