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Synthesis of Core-Shell Au@TiO2 Nanoparticles with Truncated Wedge-Shaped Morphology and Their Photocatalytic Properties
Wu, Xiao-Feng1,2; Song, Hai-Yan1,2; Yoon, Jeong-Mo1,2; Yu, Yeon-Tae1,2; Chen, Yun-Fa3; Yu, YT
2009-06-02
Source PublicationLANGMUIR
ISSN0743-7463
Volume25Issue:11Pages:6438-6447
AbstractCore-shell Au@TiO2 nanoparticles with truncated wedge-shaped TiO2 morphology have been synthesized successfully by a simple and flexible hydrothermal route. Morphological evolution of TiO2 shells was investigated by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction technique. It has been revealed that the truncated wedge-shaped TiO2 shells experience an epitaxially segmented orientation growth. Also, the (101) crystal planes of TiO2 crystals grow preferentially on the surface of gold nanocrystals stabilizing the heterointerfaces, then faster [001] growth results in the "budding" process occurs, producing growth sites on the initial deposition TiO2 layers, where the TiO2 crystals grow up into truncated wedge-shaped morphologies. It is also found that morphological evolution of TiO2 shells is dependent on the produced F- ion concentration from hydrolyzed TiF4 precursors. The produced F- ions not only facilitate the formation of well-defined wedge-like TiO2 shells, but also contribute to the externally exposed truncated crystal {004} facets. As the representative photocatalyst, the catalytic activities of the resultant core-shell Au@TiO2 nanoparticles were investigated by photoinitiated oxidation degradation of gaseous acetaldehyde. It has been indicated that the nanostructured core-shell Au@TiO2 photocatalyst represents high photocatalytic activity when exposed to UV or visible light irradiation. The high phototocatalytic performance is also largely attributed to the preferentially grown TiO2 shell structures and metal (Au)-TiO2 heterointerfaces.
KeywordFermi-level Equilibration Visible-light Doped Tio2 Gaseous Acetaldehyde Charge Separation Aqueous-solution Single-crystals Ag-at-tio2 Nanocrystals Particles
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/la900035a
Indexed BySCI
Language英语
WOS KeywordFERMI-LEVEL EQUILIBRATION ; VISIBLE-LIGHT ; DOPED TIO2 ; GASEOUS ACETALDEHYDE ; CHARGE SEPARATION ; AQUEOUS-SOLUTION ; SINGLE-CRYSTALS ; AG-AT-TIO2 ; NANOCRYSTALS ; PARTICLES
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000266604000061
Citation statistics
Cited Times:197[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6651
Collection多相复杂系统国家重点实验室
Corresponding AuthorYu, YT
Affiliation1.Chonbuk Natl Univ, Div Adv Mat Engn, Chonju 561756, South Korea
2.Chonbuk Natl Univ, Res Ctr Ind Technol, Coll Engn, Chonju 561756, South Korea
3.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Wu, Xiao-Feng,Song, Hai-Yan,Yoon, Jeong-Mo,et al. Synthesis of Core-Shell Au@TiO2 Nanoparticles with Truncated Wedge-Shaped Morphology and Their Photocatalytic Properties[J]. LANGMUIR,2009,25(11):6438-6447.
APA Wu, Xiao-Feng,Song, Hai-Yan,Yoon, Jeong-Mo,Yu, Yeon-Tae,Chen, Yun-Fa,&Yu, YT.(2009).Synthesis of Core-Shell Au@TiO2 Nanoparticles with Truncated Wedge-Shaped Morphology and Their Photocatalytic Properties.LANGMUIR,25(11),6438-6447.
MLA Wu, Xiao-Feng,et al."Synthesis of Core-Shell Au@TiO2 Nanoparticles with Truncated Wedge-Shaped Morphology and Their Photocatalytic Properties".LANGMUIR 25.11(2009):6438-6447.
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