Enhanced driving force and charge separation efficiency in disordered SnNbxOy: Boosting photocatalytic activity toward water reduction

doi:10.1016/j.cej.2016.10.061

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	Enhanced driving force and charge separation efficiency in disordered SnNbxOy: Boosting photocatalytic activity toward water reduction
	Huang, SS; Lang, JY; Du, CF; Bian, FG; Su, YG; Wang, XJ
刊名	CHEMICAL ENGINEERING JOURNAL
	2017
卷号	309 页码:313-320
关键词	Photocatalysis Niobate Nanostructures Density Functional Calculations Disordered
ISSN号	1385-8947
DOI	10.1016/j.cej.2016.10.061
文献子类	期刊论文
英文摘要	In this work, the disordered SnNbxOy with controlled structural distortion was developed in order to uncover the underlying origination for highly enhanced photocatalytic activity of the disordered materials. Synchrotron radiation wide-angle X-ray scattering (SR-WAXS) and transmission electron microscopy (TEM) results indicated that the as-prepared catalysts show disordered features with controlled short range ordering limits. In combination with optical diffuse reflectance spectra, valence band X-ray photoelectron spectroscopy (VB-XPS) and density functional theory (DFT) prediction, the disordered structure engineering can induce continuous band gap broadening and downward valence band edge, predicting enhanced oxidation driving force. Moreover, transient absorption spectroscopy (TAS), electron spin resonance (EPR) spectra suggested that the highly enhanced photocatalytic activity mainly originates from defect-assisted charge separation, which implies that abundant defective centers may serve as trap centers for efficient charge separation and improve charge transfer rate to suppress the charge recombination process. Photocatalytic test demonstrated that the optimal photocatalytic activity toward H-2 evolution of the disordered catalyst shows similar to 11.7 times improvement with respect to that of the crystalline counterpart. (C) 2016 Elsevier B.V. All rights reserved.
语种	英语
WOS记录号	WOS:000389166400034
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/27312]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 GB/T 7714	Huang, SS,Lang, JY,Du, CF,et al. Enhanced driving force and charge separation efficiency in disordered SnNbxOy: Boosting photocatalytic activity toward water reduction[J]. CHEMICAL ENGINEERING JOURNAL,2017,309:313-320.
APA	Huang, SS,Lang, JY,Du, CF,Bian, FG,Su, YG,&Wang, XJ.(2017).Enhanced driving force and charge separation efficiency in disordered SnNbxOy: Boosting photocatalytic activity toward water reduction.CHEMICAL ENGINEERING JOURNAL,309,313-320.
MLA	Huang, SS,et al."Enhanced driving force and charge separation efficiency in disordered SnNbxOy: Boosting photocatalytic activity toward water reduction".CHEMICAL ENGINEERING JOURNAL 309(2017):313-320.