Hierarchical FeTiO3-TiO2 hollow spheres for efficient simulated sunlight-driven water oxidation
Han, TR; Chen, YJ; Tian, GH; Wang, JQ; Ren, ZY; Zhou, W; Fu, HG; Tian, GH (reprint author), Heilongjiang Univ, Minist Educ Peoples Republ China, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Peoples R China.
2015
发表期刊NANOSCALE
ISSN2040-3364
卷号7期号:38页码:15924—15934
文章类型期刊文献
摘要Oxygen generation is the key step for the photocatalytic overall water splitting and considered to be kinetically more challenging than hydrogen generation. Here, an effective water oxidation catalyst of hierarchical FeTiO3-TiO2 hollow spheres are prepared via a two-step sequential solvothermal processes and followed by thermal treatment. The existence of an effective heterointerface and built-in electric field in the surface space charge region in FeTiO3-TiO2 hollow spheres plays a positive role in promoting the separation of photoinduced electron-hole pairs. Surface photovoltage, transient-state photovoltage, fluorescence and electrochemical characterization are used to investigate the transfer process of photo-induced charge carriers. The photogenerated charge carriers in the hierarchical FeTiO3-TiO2 hollow spheres with a proper molar ratio display much higher separation efficiency and longer lifetime than those in the FeTiO3 alone. Moreover, it is suggested that the hierarchical porous hollow structure can contribute to the enhancement of light utilization, surface active sites and material transportation through the framework walls. This specific synergy significantly contributes to the remarkable improvement of the photocatalytic water oxidation activity of the hierarchical FeTiO3-TiO2 hollow spheres under simulated sunlight (AM1.5).
关键词Visible-light Irradiation Photocatalytic Hydrogen Evolution Charge-transfer Properties Exposed 001 Facets Z-scheme Photogenerated Charges Oxygen Tio2 Cobalt Semiconductor
收录类别SCI
语种英语
WOS记录号WOS:000361834100045
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/24941
专题中科院上海应用物理研究所2011-2018年
通讯作者Tian, GH (reprint author), Heilongjiang Univ, Minist Educ Peoples Republ China, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Peoples R China.
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Han, TR,Chen, YJ,Tian, GH,et al. Hierarchical FeTiO3-TiO2 hollow spheres for efficient simulated sunlight-driven water oxidation[J]. NANOSCALE,2015,7(38):15924—15934.
APA Han, TR.,Chen, YJ.,Tian, GH.,Wang, JQ.,Ren, ZY.,...&Tian, GH .(2015).Hierarchical FeTiO3-TiO2 hollow spheres for efficient simulated sunlight-driven water oxidation.NANOSCALE,7(38),15924—15934.
MLA Han, TR,et al."Hierarchical FeTiO3-TiO2 hollow spheres for efficient simulated sunlight-driven water oxidation".NANOSCALE 7.38(2015):15924—15934.
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