Intrinsic Mechanisms of Morphological Engineering and Carbon Doping for Improved Photocatalysis of 2D/2D Carbon Nitride Van Der Waals Heterojunction

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外文摘要：Van der Waals(VDW)heterojunctions in a 2D/2D contact provide the highest area for the separation and transfer of charge carriers.In this work,a top-down strategy with a gas erosion process was employed to fabricate a 2D/2D carbon nitride VDW heterojunction in carbon nitride(g-C3N4)with carbon-rich carbon nitride.The created 2D semiconducting channel in the VDW structure exhibits enhanced electric field exposure and radiation absorption,which facilitates the separation of the charge carriers and their mobility.Consequently,compared with bulk g-C3N4 and its nanosheets,the photocatalytic performance of the fabricated carbon nitride VDW heterojunction in the water splitting reaction to hydrogen is improved by 8.6 and 3.3 times,respectively,while maintaining satisfactory photo-stability.Mechanistically,the finite element method(FEM)was employed to evaluate and clarify the contributions of the formation of VDW heterojunction to enhanced photocatalysis,in agreement quantitatively with experimental ones.This study provides a new and effective strategy for the modification and more insights to performance improvement on polymeric semiconductors in photocatalysis and energy conversion.

外文关键词：

carbon nitride Van der Waals heterojunctionsenhanced electric field exposureimproved radiation absorptionphotocatalytic water splittingpromoted dynamics of charge carriers

作者：

Jinqiang Zhang、Xiaoli Zhao、Lin Chen、Shuli Li、Haijun Chen、Yuezhao Zhu、Shuaijun Wang、Yang Liu、Huayang Zhang、Xiaoguang Duan、Mingbo Wu、Shaobin Wang、Hongqi Sun

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作者单位：

School of Engineering,Edith Cowan University,270 Joondalup Drive,Joondalup,WA 6027,Australia

College of Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China

Jiangsu Key Laboratory of Process Enhancement and New Energy Equipment Technology,School of Mechanical and Power Engineering,Nanjing Tech University,Nanjing 211816,China

Center for Integrated Nanostructure Physics,Institute for Basic Science(IBS),Sungkyunkwan University,Suwon 16419,Republic of Korea

School of Chemical Engineering and Advanced Materials,The University of Adelaide,Adelaide SA 5005,Australia

State Key Laboratory of Heavy Oil Processing,Institute of New Energy,College of Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China

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基金：

ECU Vice-Chancellor's Professorial Research Fellowship国家自然科学基金Australian Research Council(ARC)Australian Research Council(ARC)equipment and assistance of The University of Western Australia Centre for Microscopy,Characterization and AnalysisWA X-Ray Surface Analysis Facility of Curtin UniversityAustralian Research Council LIEF grant

项目编号：

51676096DP170104264DP190103548LE120100026

出版年：

2023

DOI：

10.1002/eem2.12365

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(3)

参考文献量49