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Composites of small Ag clusters confined in the channels of well-ordered mesoporous anatase TiO2 and their excellent solar-light-driven photocatalytic performance
Zhou, W; Li, T; Wang, JQ; Qu, Y; Pan, K; Xie, Y; Tian, GH; Wang, L; Ren, ZY; Jiang, BJ; Fu, HG; fuhg@vip.sina.com
2014
Source PublicationNANO RESEARCH
ISSN1998-0124
Volume7Issue:5Pages:731—742
AbstractSmall Ag clusters confined in the channels of ordered mesoporous anatase TiO2 have been fabricated via a vacuum-assisted wet-impregnation method, utilizing well-ordered mesoporous anatase TiO2 with high thermal stability as the host. The composites have been characterized in detail by X-ray diffraction, X-ray photoelectron spectroscopy, X-ray absorption fine structure (XAFS) spectroscopy, N-2 adsorption, UV-visible diffuse reflectance spectroscopy and transmission electron microscopy. The results indicate that small Ag clusters are formed and uniformly confined in the channels of mesoporous TiO2 with an obvious confinement effect. The presence of strong Ag-O interactions involving the Ag clusters in intimate contact with the pore walls of mesoporous TiO2 is confirmed by XAFS analysis, and favors the separation of photogenerated electron-hole pairs, as shown by steady-state surface photovoltage spectroscopy and transient-state surface photovoltage measurements. The ordered mesoporous Ag/TiO2 composites exhibit excellent solar-light-driven photocatalytic performance for the degradation of phenol. This is attributed to the synergistic effects between the small Ag clusters acting as traps to effectively capture the photogenerated electrons, and the surface plasmon resonance of the Ag clusters promoting the absorption of visible light. This study clearly demonstrates the high-efficiency utilization of noble metals in the fabrication of high-performance solar-light-driven photocatalysts.
KeywordHollow Nanostructures Nanoparticles Nanocrystals Silver Heterojunction Temperature Networks Graphene Silica
Indexed BySCI
Language英语
WOS IDWOS:000339891400009
Citation statistics
Cited Times:68[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14049
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authorfuhg@vip.sina.com
Recommended Citation
GB/T 7714
Zhou, W,Li, T,Wang, JQ,et al. Composites of small Ag clusters confined in the channels of well-ordered mesoporous anatase TiO2 and their excellent solar-light-driven photocatalytic performance[J]. NANO RESEARCH,2014,7(5):731—742.
APA Zhou, W.,Li, T.,Wang, JQ.,Qu, Y.,Pan, K.,...&fuhg@vip.sina.com.(2014).Composites of small Ag clusters confined in the channels of well-ordered mesoporous anatase TiO2 and their excellent solar-light-driven photocatalytic performance.NANO RESEARCH,7(5),731—742.
MLA Zhou, W,et al."Composites of small Ag clusters confined in the channels of well-ordered mesoporous anatase TiO2 and their excellent solar-light-driven photocatalytic performance".NANO RESEARCH 7.5(2014):731—742.
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