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https://hdl.handle.net/1822/65528
Título: | Photocatalytic Bi2O3/TiO2:N thin films with enhanced surface area and visible light activity |
Autor(es): | Dias, Luís P. Correia, Filipe C. Ribeiro, Joana Margarida Fernandes Silva Tavares, C. J. |
Palavras-chave: | Bi2O3 TiO2 photocatalysis reactive sputtering vapour-liquid-solid mechanism dendritic Bi O 2 3 |
Data: | 2020 |
Editora: | Multidisciplinary Digital Publishing Institute |
Revista: | Coatings |
Citação: | Dias, L.P.; Correia, F.C.; Ribeiro, J.M.; Tavares, C.J. Photocatalytic Bi2O3/TiO2:N Thin Films with Enhanced Surface Area and Visible Light Activity. Coatings 2020, 10, 445. |
Resumo(s): | Bi<sub>2</sub>O<sub>3</sub> nanocone films functionalized with an overlayer of TiO<sub>2</sub> were deposited by d.c. reactive magnetron sputtering. The aforementioned nanocone structures were formed via a vapour-liquid-solid (VLS) growth, starting from a catalytic bismuth seed layer. The resultant nanocones exhibit an improved surface area, measured by atomic force microscopy, when compared to non-VLS deposition of the same metal oxide. X-ray diffraction texture analysis enabled the determination of the crystallographic β-phase of Bi<sub>2</sub>O<sub>3</sub>. A very thin TiO<sub>2</sub> overlayer (6 nm thick), undoped and doped with nitrogen, was deposited onto the nanocones template, in order to functionalize these structures with a photocatalytic, self-cleaning, cap material. N-doped TiO<sub>2</sub> overlayers increased the selective absorption of visible light due to nitrogen doping in the anatase cell, thus, resulting in a concomitant increase in the overall photocatalytic efficiency. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/65528 |
DOI: | 10.3390/coatings10050445 |
e-ISSN: | 2079-6412 |
Versão da editora: | https://www.mdpi.com/2079-6412/10/5/445 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
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Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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coatings-10-00445-v5.pdf | 5,11 MB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons