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Non-uniform doping outperforms uniform doping for enhancing the photocatalytic efficiency of Au-doped TiO2 nanotubes in organic dye degradation
Zhang, Yuyuan1; Hu, Huawen1; Chang, Menglei1; Chen, Dongchu1; Zhang, Min1; Wu, Liangpeng2; Li, Xinjun2
2017-08-15
Source PublicationCERAMICS INTERNATIONAL
Volume43Issue:12Pages:9053-9059
AbstractUniform doping is usually recognized as an efficient method for enhancing photocatalysis of TiO2, while non-uniform doping is generally supposed to be inefficient because of the inhomogeneous dispersion of dopants. However, in this study, we present the first example of non-uniform doping (with Au)-better enhanced photocatalysis of TiO2 nanotubes, as compared to uniform doping, in terms of the photocatalytic organic dye degradation. The extent to which the non-uniform doping (achieved by liquid phase deposition (LPD)) can enhance photocatalysis is evaluated, along with a comparison with uniform doping. There exists an additional positive effect in the non-uniform doping system, that is, as generated interfaces between pure phase TiO2 and Au-doped TiO2, in contrast to the uniform doping system leading to a positive "platinum island" effect. Such double beneficial effects contribute to the highest performance in the photocatalytic organic dye degradation for the Au-non-uniformly doped TiO2 nanotubes as compared to other samples involved in this study. Both the "platinum island" and interfacial separation effects are helpful to isolate the photo-generated electrons and holes, resulting in enhanced photocatalytic activities.
SubtypeArticle
KeywordNon-uniform Doping Uniform Doping Au Element Tio2 Photocatalyst Liquid Phase Deposition Photocatalytic Degradation
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.ceramint.2017.04.050
WOS Subject ExtendedMaterials Science
WOS KeywordPHOTO-ASSISTED DEPOSITION ; VISIBLE-LIGHT ; ANATASE TIO2 ; FILMS ; NANOPARTICLES ; FABRICATION ; OXIDATION ; MODULATION ; ELECTRODE ; NANOROD
Indexed BySCI
Language英语
Funding OrganizationGuangdong Engineering Technique Research Center(506302679076) ; Research Platform of Universities in Foshan(2014AG10009) ; Jiangsu Provincial Key Laboratory of Biomass Energy and Materials(JSBEM201608) ; Key Laboratory of Renewable Energy (Chinese Academy of Sciences)(y207k61001)
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000402584900072
Citation statistics
Document Type期刊论文
Identifierhttp://ir.giec.ac.cn/handle/344007/14132
Collection中国科学院广州能源研究所
Affiliation1.Foshan Univ, Coll Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Yuyuan,Hu, Huawen,Chang, Menglei,et al. Non-uniform doping outperforms uniform doping for enhancing the photocatalytic efficiency of Au-doped TiO2 nanotubes in organic dye degradation[J]. CERAMICS INTERNATIONAL,2017,43(12):9053-9059.
APA Zhang, Yuyuan.,Hu, Huawen.,Chang, Menglei.,Chen, Dongchu.,Zhang, Min.,...&Li, Xinjun.(2017).Non-uniform doping outperforms uniform doping for enhancing the photocatalytic efficiency of Au-doped TiO2 nanotubes in organic dye degradation.CERAMICS INTERNATIONAL,43(12),9053-9059.
MLA Zhang, Yuyuan,et al."Non-uniform doping outperforms uniform doping for enhancing the photocatalytic efficiency of Au-doped TiO2 nanotubes in organic dye degradation".CERAMICS INTERNATIONAL 43.12(2017):9053-9059.
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