DICP OpenIR
Composite Sr2TiO4/SrTiO3(La,Cr) heterojunction based photocatalyst for hydrogen production under visible light irradiation
Jia, Yushuai1,2; Shen, Shuai1,2; Wang, Donge1; Wang, Xiang1,2; Shi, Jingying1; Zhang, Fuxiang1; Han, Hongxian1; Li, Can1
刊名JOURNAL OF MATERIALS CHEMISTRY A
2013
DOI10.1039/c3ta11326d
1期:27页:7905-7912
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences ; Technology
类目[WOS]Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary
研究领域[WOS]Chemistry ; Energy & Fuels ; Materials Science
关键词[WOS]H-2 EVOLUTION ; ABSORPTION SPECTROSCOPY ; PHASE JUNCTION ; SOLID-SOLUTION ; TIO2 ; SRTIO3 ; WATER ; SEMICONDUCTOR ; ENHANCEMENT ; METHANOL
英文摘要A composite Sr2TiO4/SrTiO3(La,Cr) heterojunction photocatalyst has been prepared by a simple in situ polymerized complex method. Upon Pt cocatalyst loading, this catalyst shows higher photocatalytic activity towards hydrogen production than individual SrTiO3(La,Cr) and Sr2TiO4(La,Cr) in the presence of methanol sacrificial reagent. Microscopic morphology studies show that well defined heterojunctions are formed by matching the lattice fringes of SrTiO3(La,Cr) and Sr2TiO4(La,Cr), and Pt was preferentially loaded on the surface of the Sr2TiO4(La,Cr) component in the composite Sr2TiO4/SrTiO3(La,Cr) photocatalyst. XPS and EPR analyses show that the composite photocatalyst also has the lowest amount of Cr6+ electron trapping sites. Band structure analysis by combining absorption spectroscopy and Mott-Schottky plots shows that, in the composite photocatalyst, the photogenerated electrons and holes tend to migrate from SrTiO3(La,Cr) to Sr2TiO4(La,Cr) and from Sr2TiO4(La,Cr) to SrTiO3(La,Cr), respectively. This kind of band structure can facilitate charge transfer and separation driven by the minor potential difference between the two components, which is further confirmed by the observation of long lived electrons in the time resolved FT-IR spectroscopic study. It is concluded that the superior photocatalytic activity of the composite heterojunction photocatalyst is due to efficient charge transfer and separation by well defined heterojunctions formed between SrTiO3(La,Cr) and Sr2TiO4(La,Cr), preferential loading of Pt nanoparticles on the Sr2TiO4(La,Cr) component, and the lowest amount of Cr6+ in the composite photocatalyst. The tailored design and synthesis of the composite heterojunction structure is a promising approach for the improvement of the photocatalytic activity of a photocatalyst.
语种英语
WOS记录号WOS:000320551200009
引用统计
被引频次:62[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/137681
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714
Jia, Yushuai,Shen, Shuai,Wang, Donge,et al. Composite Sr2TiO4/SrTiO3(La,Cr) heterojunction based photocatalyst for hydrogen production under visible light irradiation[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(27):7905-7912.
APA Jia, Yushuai.,Shen, Shuai.,Wang, Donge.,Wang, Xiang.,Shi, Jingying.,...&Li, Can.(2013).Composite Sr2TiO4/SrTiO3(La,Cr) heterojunction based photocatalyst for hydrogen production under visible light irradiation.JOURNAL OF MATERIALS CHEMISTRY A,1(27),7905-7912.
MLA Jia, Yushuai,et al."Composite Sr2TiO4/SrTiO3(La,Cr) heterojunction based photocatalyst for hydrogen production under visible light irradiation".JOURNAL OF MATERIALS CHEMISTRY A 1.27(2013):7905-7912.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jia, Yushuai]的文章
[Shen, Shuai]的文章
[Wang, Donge]的文章
百度学术
百度学术中相似的文章
[Jia, Yushuai]的文章
[Shen, Shuai]的文章
[Wang, Donge]的文章
必应学术
必应学术中相似的文章
[Jia, Yushuai]的文章
[Shen, Shuai]的文章
[Wang, Donge]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。