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
2017
发表期刊CHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
卷号309页码:313-320
文章类型期刊论文
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.
关键词Photocatalysis Niobate Nanostructures Density Functional Calculations Disordered
DOI10.1016/j.cej.2016.10.061
收录类别SCI
语种英语
WOS记录号WOS:000389166400034
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/27312
专题中科院上海应用物理研究所2011-2018年
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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.
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