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题名: Anatase TiO2 hollow nanosheets: dual roles of F-, formation mechanism, and thermal stability
作者: Shi, Quanquan1;  Li, Yong1;  Zhan, Ensheng1;  Ta, Na1;  Shen, Wenjie1
刊名: CRYSTENGCOMM
发表日期: 2014
DOI: 10.1039/c3ce42580k
卷: 16, 期:16, 页:3431-3437
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary ;  Crystallography
研究领域[WOS]: Chemistry ;  Crystallography
英文摘要: Anatase TiO2 hollow nanosheets with a width of 550 nm, a thickness of 100 nm, and a hole diameter of 350 nm were hydrothermally fabricated in an aqueous solution containing NH4VO3, HF, and HCl at an appropriate composition. Structural analyses on the products obtained at different intervals during the synthesis revealed that the formation of the anatase TiO2 hollow nanosheets consisted of three steps: oriented assembly of square-like NH4TiOF3 nanoparticles, topochemical conversion of NH4TiOF3 to anatase TiO2, and selective etching by F- on the flat nanosheets. The fluorine anion was involved in the formation of NH4TiOF3 as the key intermediate, it directed the construction of the nanosheet, and participated in the etching process to generate the hollow structure. The resultant anatase TiO2 hollow nanosheets exhibited a rather high thermal stability, maintaining the anatase crystallite structure and the hollow shape up to 1073 K.
关键词[WOS]: EXPOSED 001 FACETS ;  UNIFORM NH4TIOF3 MESOCRYSTALS ;  PHOTOCATALYTIC ACTIVITY ;  PHASE-TRANSFORMATION ;  TITANIUM-DIOXIDE ;  GROWTH-MECHANISM ;  SINGLE-CRYSTALS ;  SURFACE ;  TEMPERATURE ;  PERFORMANCE
语种: 英语
WOS记录号: WOS:000333580100024
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145536
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Shi, Quanquan,Li, Yong,Zhan, Ensheng,et al. Anatase TiO2 hollow nanosheets: dual roles of F-, formation mechanism, and thermal stability[J]. CRYSTENGCOMM,2014,16(16):3431-3437.
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