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Dimension‐Matched Zinc Phthalocyanine/BiVO 4 Ultrathin Nanocomposites for CO 2 Reduction as Efficient Wide‐Visible‐Light‐Driven Photocatalysts via a Cascade Charge Transfer
Author(s) -
Bian Ji,
Feng Jiannan,
Zhang Ziqing,
Li Zhijun,
Zhang Yuhang,
Liu Yadi,
Ali Sharafat,
Qu Yang,
Bai Linlu,
Xie Jijia,
Tang Dongyan,
Li Xin,
Bai Fuquan,
Tang Junwang,
Jing Liqiang
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201905274
Subject(s) - heterojunction , materials science , nanosheet , nanocomposite , photocatalysis , electron transfer , excited state , phthalocyanine , photochemistry , cascade , nanostructure , visible spectrum , semiconductor , charge (physics) , optoelectronics , nanotechnology , chemistry , catalysis , physics , atomic physics , organic chemistry , chromatography , quantum mechanics
Cascade charge transfer was realized by a H‐bond linked zinc phthalocyanine/BiVO 4 nanosheet (ZnPc/BVNS) composite, which subsequently works as an efficient wide‐visible‐light‐driven photocatalyst for converting CO 2 into CO and CH 4 , as shown by product analysis and 13 C isotopic measurement. The optimized ZnPc/BVNS nanocomposite exhibits a ca. 16‐fold enhancement in the quantum efficiency compared with the reported BiVO 4 nanoparticles at the excitation of 520 nm with an assistance of 660 nm photons. Experimental and theoretical results show the exceptional activities are attributed to the rapid charge separation by a cascade Z‐scheme charge transfer mechanism formed by the dimension‐matched ultrathin (ca. 8 nm) heterojunction nanostructure. The central Zn 2+ in ZnPc could accept the excited electrons from the ligand and then provide a catalytic function for CO 2 reduction. This Z‐scheme is also feasible for other MPc, such as FePc and CoPc, together with BVNS.