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journal article·2020-10

A Tandem 0D/2D/2D NbS2 Quantum Dot/Nb2O5 Nanosheet/g‐C3N4 Flake System with Spatial Charge–Transfer Cascades for Boosting Photocatalytic Hydrogen Evolution

Bo Lin, Zihao Chen, Pin Song, Haishi Liu, Lixing Kang, Jun Di, Xiao Luo, Longqing Chen, Chao Xue, Bowen Ma, Guidong Yang, Jun Tang, Jiadong Zhou, Zheng Liu, Fucai Liu

Small· Volume 16· Issue 42
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Source abstract

Abstract

Abstract The relatively high recombination rate of charges remains the most critical limiting factor for solar‐driven water splitting for hydrogen generation. Herein, a tandem 0D/2D/2D NbS2 quantum dot/Nb2O5 nanosheet/g‐C3N4 flake (NSNOCN) system is designed. Owing to the unique spatial‐arrangement and elaborate morphology of 0D NbS2, 2D Nb2O5, and 2D g‐C3N4 in the newly designed NSNOCN, plenty of spatial charge–transfer cascades from g‐C3N4 to NbS2 via Nb2O5 are formed to accelerate separation and transfer of charges significantly, thus contributing to a high photocatalytic H2 generation rate of 13.99 mmol h−1 g−1 (an apparent quantum efficiency of 10.8% at 420 nm), up to 107.6 and 43.7 times by contrast with that of g‐C3N4 and Nb2O5, respectively. This work can provide a new platform in the design of artificial photocatalytic systems with high charge–transfer efficiency.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Gas Sensing Nanomaterials and Sensors · ZnO doping and properties

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 China

XJTU‐Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and Technology Xi'an Jiaotong University Xi'an 710049 China

Center for Programmable Materials School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore

Key Laboratory of Radiation Physics and Technology of Ministry of Education Institute of Nuclear Science and Technology Sichuan University Chengdu 610064 China

State Centre for International Cooperation on Designer Low‐Carbon and Environmental Materials (CDLCEM) School of Materials Science and Engineering Zhengzhou University Zhengzhou 450001 China

Funding

China Postdoctoral Science Foundation · Applied Basic Research Program of Sichuan Province · Ministry of Education - Singapore

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