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Ag nanoparticles anchored organic/inorganic Z‐scheme 3DOMM‐TiO_(2‒x)‐based heterojunction for efficient photocatalytic and photoelectrochemical water splitting

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Chinese Journal of Catalysis 2022年第5期43卷 1360-1370页

作者： Zhiying Xu Chunyu Guo Xin Liu Ling Li Liang Wang Haolan Xu Dongke Zhang Chunhu Li Qin Li Wentai Wang Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationCollege of Chemistry and Chemical EngineeringOcean University of ChinaQingdao 266100ShandongChina Institute for New Energy Materials and Low‐Carbon Technologies Tianjin University of TechnologyTianjin 300384China Future Industries Institute UniSA STEMUniversity of South AustraliaMawson Lakes CampusSouth Australia 5095Australia Centre for Energy(M473) The University of Western Australia35 Stirling HighwayCrawleyWestern Australia 6009Australia Queensland Micro‐and Nanotechnology Centre Griffith University Nathan CampusBrisbaneQueensland 4111Australia College of Food Engineering Qingdao Institute of TechnologyQingdao 266300ShandongChina

Narrow spectral response,low charge separation efficiency and slow water oxidation kinetics of TiO_(2)limit its application in photoelectrochemical and photocatalytic water ***,a promising organic/inorganic composite catalyst Ag/PANI/3DOMM‐TiO_(2–x)with a three‐dimensional ordered macro‐and meso‐porous(3DO MM)structure,oxygen vacancy and Ti^(3+)defects,heterojunction formation and noble metal Ag was designed based on the Z‐scheme mechanism and successfully *** Ag/PANI/3DOMM‐TiO_(2–x)ternary catalyst exhibited enhanced hydrogen production activity in both photocatalytic and photoelectrochemical water *** photocatalytic hydrogen production rate is 420.90μmol g^(–1)h^(–1),which are 19.80 times and 2.06 times higher than the commercial P25 and 3DOMM‐TiO_(2),*** the photoelectrochemical tests,the Ag/PANI/3DOMM‐TiO_(2–x)photoelectrode shows enhanced separation and transfer of carriers with a high current density of 1.55 mA cm^(–2)at equilibrium potential of 1.23 V under simulated AM 1.5 G illumination,which is approximately 5 times greater than the 3DOMM‐TiO_(2).The present work has demonstrated the promising potential of organic/inorganic Z‐scheme photocatalyst in driving water splitting for hydrogen production.

关键词： Photoelectrochemical Photocatalysis organic/inorganic composite Heterojunction Water splitting

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