Interfacial coupled engineering of plasmonic amorphous MoO3-x nanodots/g-C3N4 nanosheets for photocatalytic water splitting and photothermal conversion

Yumei Ren; Desheng Feng; Zhiming Yan; Zixu Sun; Zixuan Zhang; Dongwei Xu; Chong Qiao; Zhonghui Chen; Yu Jia; Seong Chan Jun; Shude Liu; Yusuke Yamauchi

doi:10.1016/j.cej.2022.139875

Interfacial coupled engineering of plasmonic amorphous MoO_3-x nanodots/g-C₃N₄ nanosheets for photocatalytic water splitting and photothermal conversion

Yumei Ren, Desheng Feng, Zhiming Yan, Zixu Sun, Zixuan Zhang, Dongwei Xu, Chong Qiao, Zhonghui Chen, Yu Jia, Seong Chan Jun, Shude Liu, Yusuke Yamauchi

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Semiconductor-based plasmonic materials have attracted extensive attention for photocatalytic systems. However, their photocatalytic reactions are hindered by limited light-harvesting ability and the transfer rate of photo-generated electrons. Herein, vacancy engineering and phase engineering are rationally integrated to develop amorphous molybdenum oxide (a-MoO_3−x) nanodots anchored on g-C₃N₄ as a highly active photocatalyst. Through high localized surface plasmon resonance (LSPR) effect of a-MoO_3−x nanodots and tunable electrical properties induced by the heterostructural interface, the Z-scheme a-MoO_3−x/g-C₃N₄ heterostructure demonstrates broadband absorption and the excited photo-generated electrons. Further theoretical calculations demonstrate that the enhancement of photocatalytic and photothermal performance is mainly attributed to the highly localized Anderson tail states of a-MoO_3−x. Consequently, the a-MoO_3−x/g-C₃N₄ heterostructure exhibits a photocurrent density of ∼36.5 μA cm⁻², which is about 2.7 and 4.1 times higher than that of pure g-C₃N₄ nanosheets (∼13.5 μA cm⁻²) and a-MoO_3−x nanodots (∼9 μA cm⁻²), respectively. The photocatalytic performance enhancement relying on defects and long-range disorder of a-MoO_3−x in Z-scheme heterostructure is explored.

Original language	English
Article number	139875
Journal	Chemical Engineering Journal
Volume	453
DOIs	https://doi.org/10.1016/j.cej.2022.139875
Publication status	Published - 2023 Feb 1

Bibliographical note

Funding Information:
This work is supported by the Natural Science Foundation of Henan Province (No. 202300410488 ), the National Natural Science Foundation of China (No. 22102050 ), Key Scientific Research Project of Henan Colleges and Universities (No. 21A150056), the fellowship of China Postdoctoral Science Foundation (No. 2021 M690048). S. Liu and S.C. Jun would like to gratefully acknowledge the financial support from the Korea Electric Power Corporation (Grant No. R19XO01-23). Y. Yamauchi would like to gratefully acknowledge the financial support from the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australia’s researchers.

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.cej.2022.139875

Cite this

Ren, Y., Feng, D., Yan, Z., Sun, Z., Zhang, Z., Xu, D., Qiao, C., Chen, Z., Jia, Y., Chan Jun, S., Liu, S., & Yamauchi, Y. (2023). Interfacial coupled engineering of plasmonic amorphous MoO_3-x nanodots/g-C₃N₄ nanosheets for photocatalytic water splitting and photothermal conversion. Chemical Engineering Journal, 453, Article 139875. https://doi.org/10.1016/j.cej.2022.139875

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title = "Interfacial coupled engineering of plasmonic amorphous MoO3-x nanodots/g-C3N4 nanosheets for photocatalytic water splitting and photothermal conversion",

abstract = "Semiconductor-based plasmonic materials have attracted extensive attention for photocatalytic systems. However, their photocatalytic reactions are hindered by limited light-harvesting ability and the transfer rate of photo-generated electrons. Herein, vacancy engineering and phase engineering are rationally integrated to develop amorphous molybdenum oxide (a-MoO3−x) nanodots anchored on g-C3N4 as a highly active photocatalyst. Through high localized surface plasmon resonance (LSPR) effect of a-MoO3−x nanodots and tunable electrical properties induced by the heterostructural interface, the Z-scheme a-MoO3−x/g-C3N4 heterostructure demonstrates broadband absorption and the excited photo-generated electrons. Further theoretical calculations demonstrate that the enhancement of photocatalytic and photothermal performance is mainly attributed to the highly localized Anderson tail states of a-MoO3−x. Consequently, the a-MoO3−x/g-C3N4 heterostructure exhibits a photocurrent density of ∼36.5 μA cm−2, which is about 2.7 and 4.1 times higher than that of pure g-C3N4 nanosheets (∼13.5 μA cm−2) and a-MoO3−x nanodots (∼9 μA cm−2), respectively. The photocatalytic performance enhancement relying on defects and long-range disorder of a-MoO3−x in Z-scheme heterostructure is explored.",

author = "Yumei Ren and Desheng Feng and Zhiming Yan and Zixu Sun and Zixuan Zhang and Dongwei Xu and Chong Qiao and Zhonghui Chen and Yu Jia and {Chan Jun}, Seong and Shude Liu and Yusuke Yamauchi",

note = "Funding Information: This work is supported by the Natural Science Foundation of Henan Province (No. 202300410488 ), the National Natural Science Foundation of China (No. 22102050 ), Key Scientific Research Project of Henan Colleges and Universities (No. 21A150056), the fellowship of China Postdoctoral Science Foundation (No. 2021 M690048). S. Liu and S.C. Jun would like to gratefully acknowledge the financial support from the Korea Electric Power Corporation (Grant No. R19XO01-23). Y. Yamauchi would like to gratefully acknowledge the financial support from the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano and microfabrication facilities for Australia{\textquoteright}s researchers. Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

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AU - Ren, Yumei

AU - Feng, Desheng

AU - Yan, Zhiming

AU - Sun, Zixu

AU - Zhang, Zixuan

AU - Xu, Dongwei

AU - Qiao, Chong

AU - Chen, Zhonghui

AU - Jia, Yu

AU - Chan Jun, Seong

AU - Liu, Shude

AU - Yamauchi, Yusuke

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N2 - Semiconductor-based plasmonic materials have attracted extensive attention for photocatalytic systems. However, their photocatalytic reactions are hindered by limited light-harvesting ability and the transfer rate of photo-generated electrons. Herein, vacancy engineering and phase engineering are rationally integrated to develop amorphous molybdenum oxide (a-MoO3−x) nanodots anchored on g-C3N4 as a highly active photocatalyst. Through high localized surface plasmon resonance (LSPR) effect of a-MoO3−x nanodots and tunable electrical properties induced by the heterostructural interface, the Z-scheme a-MoO3−x/g-C3N4 heterostructure demonstrates broadband absorption and the excited photo-generated electrons. Further theoretical calculations demonstrate that the enhancement of photocatalytic and photothermal performance is mainly attributed to the highly localized Anderson tail states of a-MoO3−x. Consequently, the a-MoO3−x/g-C3N4 heterostructure exhibits a photocurrent density of ∼36.5 μA cm−2, which is about 2.7 and 4.1 times higher than that of pure g-C3N4 nanosheets (∼13.5 μA cm−2) and a-MoO3−x nanodots (∼9 μA cm−2), respectively. The photocatalytic performance enhancement relying on defects and long-range disorder of a-MoO3−x in Z-scheme heterostructure is explored.

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