Ternary heterojunctions on Zn_(3)In_(2)S_(6)/C_(3)N_(5)towards advancing simultaneous photocatalytic production of H_(2)O_(2)and benzaldehydeOA
Cooperative photocatalysis for simultaneous hydrogen peroxide(H_(2)O_(2))production and organic oxidation presents a sustainable approach to solar-to-chemical energy conversion.While Zn_(x)In_(2)S_(x+3)materials are promising candidates,the study of high stoichiometry(x>1)variants is still limited.Moreover,the synergy of mixed-phase C_(3)N_(5)and Zn_(x)In_(2)S_(x+3)remains to be explored.Herein,a series of Zn_(x)In_(2)S_(x+3)(x=1–4)photocatalysts(RZISx)were synthesized via reflux,with Zn_(3)In_(2)S_(6)(x=3)identified as the optimal composition,achieving H_(2)O_(2)and benzaldehyde production rates of 1430.9±65.6μM h^(-1)and 2473.2±264.2μM h^(-1),respectively.Crystalline C_(3)N_(5)(CCN550)was synthesized by the molten-salt method and a ternary heterostructure(5CCN/RZIS3)was further developed by compositing Zn_(3)In_(2)S_(6)with CCN550 during refluxing,leading to enhanced yields of H_(2)O_(2)(2655.2±167.1μM h^(-1);apparent quantum efficiency(AQE):1.1%at 420 nm)and benzaldehyde(2685.9±126.5μM h^(-1)).Improved performance stems from the intimate interface between Zn_(3)In_(2)S_(6)and heptazine/triazine domains in C_(3)N_(5),which facilitates efficient charge separation and boosts O_(2)adsorption.Rotating disk electrode measurements confirmed high selectivity toward the two-electron oxygen reduction pathway.This study introduces a ternary heterojunction strategy and provides insights into the role of crystalline structure and heterointerface engineering in advancing dual-functional photocatalysis.
Brenden Jing Su;Joel Jie Foo;Grayson Zhi Sheng Ling;Wee-Jun Ong
School of Energy and Chemical Engineering,Xiamen University Malaysia,Selangor Darul Ehsan,43900,Malaysia Center of Excellence for NaNo Energy&Catalysis Technology(CoNNECT),Xiamen University Malaysia,Selangor Darul Ehsan,43900,MalaysiaSchool of Energy and Chemical Engineering,Xiamen University Malaysia,Selangor Darul Ehsan,43900,Malaysia Center of Excellence for NaNo Energy&Catalysis Technology(CoNNECT),Xiamen University Malaysia,Selangor Darul Ehsan,43900,MalaysiaSchool of Energy and Chemical Engineering,Xiamen University Malaysia,Selangor Darul Ehsan,43900,Malaysia Center of Excellence for NaNo Energy&Catalysis Technology(CoNNECT),Xiamen University Malaysia,Selangor Darul Ehsan,43900,MalaysiaSchool of Energy and Chemical Engineering,Xiamen University Malaysia,Selangor Darul Ehsan,43900,Malaysia Center of Excellence for NaNo Energy&Catalysis Technology(CoNNECT),Xiamen University Malaysia,Selangor Darul Ehsan,43900,Malaysia State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen,361005,China Gulei Innovation Institute,Xiamen University,Zhangzhou,363200,China Shenzhen Research Institute of Xiamen University,Shenzhen,518057,China Department of Chemical and Biological Engineering,College of Engineering,Korea University,145 Anam-ro,Seongbukgu,Seoul,02841,Republic of Korea
化学化工
Photocatalytic hydrogen peroxide productionBenzyl alcohol oxidationCrystallinityHeterojunction engineeringCarbon nitride
《Green Chemical Engineering》 2026 (4)
P.436-446,11
the financial support provided by the Ministry of Higher Education Malaysia under the Fundamental Research Grant Scheme(FRGS)(Ref No.FRGS/1/2024/TK08/XMU/02/1)supported by the PETRONAS-Academia Collaboration Dialogue(PACD 2023)grant,provided by PETRONAS Research Sdn.Bhd.(PRSB)the Ministry of Science,Technology and Innovation(MOSTI)Malaysia under the Strategic Research Fund(SRF)(S.22015)supported by the National Natural Science Foundation of China(Ref No.:22202168)Guangdong Basic and Applied Basic Research Foundation(Ref No.:2021A1515111019)the financial support from the State Key Laboratory of Physical Chemistry of Solid Surfaces,Xiamen University(Ref No.:2023X11)supported by the Embassy of the People''s Republic of China in Malaysia(EENG/0045)funded by Xiamen University Malaysia Investigatorship Grant(Grant No.:IENG/0038)Xiamen University Malaysia Research Fund(ICOE/0001,XMUMRF/2025-C15/IENG/0080,and XMUMRF/2021-C8/IENG/0041)。
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