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题名:
Enhanced driving force and charge separation efficiency in disordered SnNbxOy: Boosting photocatalytic activity toward water reduction
作者: Huang, SS; Lang, JY; Du, CF; Bian, FG; Su, YG; Wang, XJ
刊名: CHEMICAL ENGINEERING JOURNAL
出版日期: 2017
卷号: 309, 页码:313-320
关键词: Photocatalysis ; Niobate ; Nanostructures ; Density functional calculations ; Disordered
DOI: 10.1016/j.cej.2016.10.061
文章类型: 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.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000389166400034
ISSN号: 1385-8947
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/27312
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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Recommended Citation:
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,2017-01-01,309:313-320.
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文件名: Enhanced driving force and charge separation efficiency in disordered SnNbxOy_ Boosting photocatalytic activity toward water reduction.pdf
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