Anchoring of black phosphorus quantum dots onto WO3 nanowires to boost photocatalytic CO2 conversion into solar fuels

Wa Gao; Xiaowan Bai; Yuying Gao; Jinqiu Liu; Huichao He; Yong Yang; Qiutong Han; Xiaoyong Wang; Xinglong Wu; Jinlan Wang; Fengtao Fan; Yong Zhou; Can Li; Zhigang Zou

doi:10.1039/D0CC00805B

Anchoring of black phosphorus quantum dots onto WO₃ nanowires to boost photocatalytic CO₂ conversion into solar fuels†

Wa Gao,‡^a Xiaowan Bai,‡^b Yuying Gao,‡^cd Jinqiu Liu,^a Huichao He,

^e Yong Yang,^f Qiutong Han,^a Xiaoyong Wang,^a Xinglong Wu,^a Jinlan Wang,

*^b Fengtao Fan,*^c Yong Zhou,

*^a Can Li

^c and Zhigang Zou^a

Author affiliations

* Corresponding authors

^a National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory for Nano Technology, School of Physics, Nanjing University, Nanjing 210093, P. R. China
E-mail: zhouyong1999@nju.edu.cn

^b School of Physics, Southeast University, Nanjing 211189, P. R. China
E-mail: jlwang@seu.edu.cn

^c State Key Laboratory of Catalysis, iChEM, Dalian Institute of Chemical Physics, CAS, Dalian National Laboratory for Clean Energy, Dalian 116023, P. R. China
E-mail: ftfan@dicp.ac.cn

^d University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, P. R. China

^e State Key Laboratory of Environmental Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, Sichuan 621010, P. R. China

^f Key Laboratory of Soft Chemistry and Functional Materials (MOE), Nanjing University of Science and Technology, Nanjing 210094, P. R. China

Abstract

A 0D–1D direct Z-scheme heterojunction consisting of black phosphorus quantum dots (BPQDs) anchored onto WO₃ nanowires was well designed. Kelvin probe force microscopy studies provide direct evidence for charge transfer and separation between BPQDs and WO₃ in a single nanowire, confirming the Z-scheme model. The BPQD–WO₃ heterojunction displays excellent performance of photocatalytic reduction of CO₂, exhibiting not only highly efficient carbon monoxide solar fuel conversion, but also a significant amount of ethylene (C₂H₄), a highly value-added hydrocarbon species, rarely reported in previous photocatalysis processes. Both experimental and theoretical calculations demonstrate that BPQD plays a critical role in photocatalytic formation of C₂H₄ from CO₂.

Chemical Communications

Anchoring of black phosphorus quantum dots onto WO₃ nanowires to boost photocatalytic CO₂ conversion into solar fuels†

Abstract

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Anchoring of black phosphorus quantum dots onto WO₃ nanowires to boost photocatalytic CO₂ conversion into solar fuels

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