S-scheme Porous g-C_(3)N_(4)/Ag_(2)MoO_(4)Heterojunction Composite for CO_(2)Photoreduction  被引量:5

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作  者:Zhongliao Wang Ruilian Liu Jinfeng Zhang Kai Dai 

机构地区:[1]Key Laboratory of Green and Precise Synthetic Chemistry and Applications,Ministry of Education,Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation,School of Physics and Electronic Information,Huaibei Normal University,Huaibei 235000,China

出  处:《Chinese Journal of Structural Chemistry》2022年第6期15-22,共8页结构化学(英文)

基  金:supported by the National Natural Science Foundation of China(51572103 and 51973078);the Distinguished Young Scholar of Anhui Province(1808085J14);the Major Projects of Education Department of Anhui Province(KJ2020ZD005);the Key Foundation of Educational Commission of Anhui Province(KJ2019A0595)。

摘  要:Utilizing solar energy to achieve artificial photosynthesis of chemical fuel is prevalent in tackling excessive CO_(2)emission and fossil fuel depletion.Grievous charge recombination and weak redox capability aggravate the CO_(2)photoreduction performance.Engineering tailored morphology and constructing matched heterostructure are two significant schemes to ameliorate the CO_(2)photoconversion efficiency of g-C_(3)N_(4)-based composite.Herein,a novel S-scheme ultrathin porous g-C_(3)N_(4)(UPCN)/Ag_(2)MoO_(4)(AMO)composite was designed by in-situ growing tetragonalα-AMO nanoparticles(NPs)(5-30 nm)on UPCN nanosheets(NSs).The S-scheme charge transfer route endows UPCN/AMO with fast charge separation and strong redox capability,demonstrated by X-ray photoelectron spectroscopy(XPS),photoelectrochemical tests,steady-state and time-resolved photoluminescence(PL)spectra,and DFT calculations.The UPCN/AMO composite exhibits elevated CO_(2)photoreduction performance with CO and CH_(4)yield rates of 6.98 and 0.38μmol g^(-1)h^(-1),which are 3.5 and 2.9 folds higher than that of pristine UPCN,respectively.Finally,the CO_(2)photoreduction intermediates are analyzed,and the CO_(2)photoreduction mechanism is discussed.This work provides a reference for various g-C_(3)N_(4)-based composites applied in artificial photosynthesis.

关 键 词:S-scheme g-C_(3)N_(4) Ag_(2)MoO_(4) HETEROJUNCTION CO_(2)photoreduction 

分 类 号:TB332[一般工业技术—材料科学与工程] X701[环境科学与工程—环境工程]

 

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