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Preparation of a La/N co-doped TiO2 film electrode with visible light response and its photoelectrocatalytic activity on a Ni substrate
Xiao Zhou;  Xiaona Zhang;  Xinbin Feng;  Juan Zhou;  Shaoqi Zhou
2016
Source PublicationDyes and Pigments
Volume125Pages:375-383
Abstract

To prevent the recombination of photoelectron hole pairs and to extend the adsorption in the visiblelight region, a TiO2 coating co-doped with lanthanum and nitrogen on nickel foam was successfully prepared through sol gel and dip coating methods using the precursors butyl titanate (TBOT) for Ti, lanthanum trioxide for La and urea for nitrogen. The photoelectrocatalytic properties of the prepared samples in the degradation of malachite green were examined under visible light. The phase composition, crystalline structure and optical properties of the La/N co-doped TiO2(Ni) photo-electrodes were studied using different measurement methods, including XRD, SEM, UV-vis DRS, Raman and FUR. The results indicated that the co-doped TiO2(Ni) photo-electrode not only effectively restrained the growth of the TiO2 grains, but also inhibited the transformation of the titania phase from anatase to rutile. The photo-response of the modified samples was substantially extended from 400 nm to 480 nm, and the band gap narrowed from 3.2 eV to 2.79 eV. The co-doped TiO2(Ni) samples exhibited higher photocatalytic activity as a result of the synergistic effects of the La and N co-doping. The degradation rate of malachite green by the La0.2%N20%/TiO2(Ni) photo-electrode was 23.5% higher than that of the un-doped sample; this result indicated that the extended range of responsive wavelengths greatly expanded the possible applications of the modified electrode. When a low bias voltage was applied to the La0.2%N20%/ TiO2(Ni) photo-electrodes, the electrodes exhibited even better photoelectrochemical properties and photoelectrocatalytic activity than a La0.2%N20%/TiO2(Ni) film under visible light irradiation.

KeywordLa/n Co-doping Tio2 Ni Foam Substrate Photoelectrocatalysis Visible Light Mechanistic Considerations
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8204
Collection环境地球化学国家重点实验室
Affiliation1.Institute of Biology, Guizhou Academy of Sciences, Shanxi Road 1, Guiyang, 550001, PR China
2.College of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, 510006, PR China
3.State Key Laboratory of Subtropical Building Sciences, South China University of Technology, Guangzhou, 510641, PR China
4.College of Chemical Biology and Material Science, East China Institute of Technology, Guanglan Road No. 418, Nanchang, 330013, PR China
5.Institute of Geochemistry, Chinese Academy of Sciences, Naming Road No. 46, Guiyang, 550001, PR China
Recommended Citation
GB/T 7714
Xiao Zhou;Xiaona Zhang;Xinbin Feng;Juan Zhou;Shaoqi Zhou. Preparation of a La/N co-doped TiO2 film electrode with visible light response and its photoelectrocatalytic activity on a Ni substrate[J]. Dyes and Pigments,2016,125:375-383.
APA Xiao Zhou;Xiaona Zhang;Xinbin Feng;Juan Zhou;Shaoqi Zhou.(2016).Preparation of a La/N co-doped TiO2 film electrode with visible light response and its photoelectrocatalytic activity on a Ni substrate.Dyes and Pigments,125,375-383.
MLA Xiao Zhou;Xiaona Zhang;Xinbin Feng;Juan Zhou;Shaoqi Zhou."Preparation of a La/N co-doped TiO2 film electrode with visible light response and its photoelectrocatalytic activity on a Ni substrate".Dyes and Pigments 125(2016):375-383.
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