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A High Catalytic Activity Photocatalysts Based on Porous Metal Sulfides/TiO 2 Heterostructures
Author(s) -
Qian Yongteng,
Wang Le,
Du Jimin,
Yang Hao,
Li Mancong,
Wang Yina,
Kang Dae Joon
Publication year - 2021
Publication title -
advanced materials interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.671
H-Index - 65
ISSN - 2196-7350
DOI - 10.1002/admi.202001627
Subject(s) - materials science , heterojunction , catalysis , rhodamine b , crystallinity , degradation (telecommunications) , chemical engineering , photocatalysis , porosity , metal , visible spectrum , irradiation , optoelectronics , composite material , metallurgy , organic chemistry , chemistry , telecommunications , physics , computer science , nuclear physics , engineering
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.