A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO2 Heterostructures

作者：Yongteng Qian, Le Wang, Jimin Du, Hao Yang, Mancong Li, Yina Wang, Dae Joon Kang · 发表于：Advanced Materials Interfaces · 年份：2020 · DOI：10.1002/admi.202001627 · 被引用次数：28 · 研究领域：Advanced Photocatalysis Techniques、Covalent Organic Framework Applications、Quantum Dots Synthesis And Properties

Abstract Porous metal sulfides/TiO 2 (P‐MST) photocatalysts are successfully prepared via a low‐cost strategy. It is found that the P‐MST possesses a high crystallinity with average pore size of ≈500 nm, which greatly enhances the structural stability as well as catalytic activity. The catalytic properties of the P‐MST are examined by monitoring the degradation of rhodamine B (RhB) under visible‐light irradiation. Particularly, the optimized 7% Bi 2 S 3 –CdS–MoS 2 –TiO 2 heterostructures exhibit a remarkable catalytic performance (i.e., the degradation of RhB of ≈98.9%) and long‐term cyclic stability (i.e., the catalytic activity of ≈91.7% even after 30 cyclic test), compared with that of other P‐MST heterostructures. The exceptional catalytic performance may be ascribed to the following benefits: i) the porous structure supplies ample carrier charge transfer channels and lots of surface reaction sites; and ii) the suitable amount of metal sulfides grown on TiO 2 have contributed to significant improvement of the electrical conductivity and the light absorption capability.