Band Gap Narrowing of Bi-Doped NaTaO3 for Photocatalytic Hydrogen Evolution under Simulated Sunlight: A Pseudocubic Phase Induced by Doping

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniv Fed Pelotas-
Autor(es): dc.creatorAlves, Gustavo A. S.-
Autor(es): dc.creatorCenturion, Higor A.-
Autor(es): dc.creatorSambrano, Julio R. [UNESP]-
Autor(es): dc.creatorFerrer, Mateus M.-
Autor(es): dc.creatorGoncalves, Renato-
Data de aceite: dc.date.accessioned2022-02-22T00:55:33Z-
Data de disponibilização: dc.date.available2022-02-22T00:55:33Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-01-24-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acsaem.0c02547-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/209165-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/209165-
Descrição: dc.descriptionNaTaO3 is a promising material for the production of hydrogen fuel via photocatalytic water splitting, although the wide band gap prevents its application with solar light. In order to overcome this issue, bismuth doping has been proposed as a method for band gap narrowing by introducing midgap electron states. In this work, Bi-doped NaTaO3 nanocubes were synthesized through a facile molten salt method and the photocatalysts exhibit hydrogen evolution under simulated sunlight irradiation (AM 1.5G). X-ray diffraction, Raman, and UV-vis spectra suggest that the incorporation of Bi3+ at the Ta-site induces band gap narrowing, in addition to a structural transition, as the orthorhombic perovskite lattice becomes pseudocubic at low dopant concentrations (0.5-4 mol %). The optimal photocatalytic activity of 3 mol % Bi-doped NaTaO3 may be a result of the simultaneous presence of the pseudocubic lattice and the narrowed band gap of 3.6 eV, which in turn promote the absorption of ultraviolet light from the AM 1.5G irradiation source. Theoretical simulations based on density functional theory were used in conjunction with the experimental results to present in detail the additional contribution of the doped pseudocubic phase in the system. Furthermore, 3 mol % Bi-doped NaTaO3 was loaded with Ni cocatalysts by magnetron sputtering deposition, leading to enhanced and stable H-2 production rates for more than 100 h of reaction.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionNational Centre for Energy and Materials Research (CNPEM)-
Descrição: dc.descriptionBrazilian Nanotechnology National Laboratory (LNNano)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionUniv Sao Paulo, Sao Carlos Inst Phys, BR-13560970 Sao Carlos, SP, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Modeling & Mol Simulat Grp, BR-17030360 Bauru, SP, Brazil-
Descrição: dc.descriptionUniv Fed Pelotas, CCAF, PPGCEM CDTec, BR-96010610 Pelotas, RS, Brazil-
Descrição: dc.descriptionSao Paulo State Univ, Modeling & Mol Simulat Grp, BR-17030360 Bauru, SP, Brazil-
Descrição: dc.descriptionFAPESP: 2017/18716-3-
Descrição: dc.descriptionFAPESP: 2018/25705-0-
Descrição: dc.descriptionBrazilian Nanotechnology National Laboratory (LNNano): TEM-C1-27122-F-
Descrição: dc.descriptionFAPESP: 2019/08928-9-
Descrição: dc.descriptionCNPq: 432242/2018-0-
Formato: dc.format671-679-
Idioma: dc.languageen-
Publicador: dc.publisherAmer Chemical Soc-
Relação: dc.relationAcs Applied Energy Materials-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectphotocatalytic water splitting-
Palavras-chave: dc.subjectsodium tantalate-
Palavras-chave: dc.subjectperovskite oxide-
Palavras-chave: dc.subjectdoping-
Palavras-chave: dc.subjectphase transition-
Palavras-chave: dc.subjectsimulated sunlight-
Título: dc.titleBand Gap Narrowing of Bi-Doped NaTaO3 for Photocatalytic Hydrogen Evolution under Simulated Sunlight: A Pseudocubic Phase Induced by Doping-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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