| Full text | |
| Author(s): Show less - |
Santanna, M. A.
[1]
;
Menezes, W. T.
[2, 3]
;
Santana, Y. V. B.
[4, 1]
;
Ferrer, M. M.
[5]
;
Gouveia, A. F.
[1]
;
Faceto, A. D.
[6]
;
Terezo, A. J.
[2, 3]
;
Oliveira, A. J. A.
[6]
;
Longo, E.
[1, 7]
;
Freitas, R. G.
[2, 3]
;
Pereira, E. C.
[1]
Total Authors: 11
|
| Affiliation: | [1] Univ Fed Sao Carlos, Dept Chem, Lab Interdisciplinar Eletroquim & Ceramia, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Fed Mato Grosso, Dept Chem, Lab Computac Mat, BR-78060900 Cuiaba, MT - Brazil
[3] Univ Fed Mato Grosso, Dept Chem, Grp Eletroquim & Novos Mat, BR-78060900 Cuiaba, MT - Brazil
[4] Fed Technol Univ Parana, BR-86300000 Cornelio Procopio, PR - Brazil
[5] Sao Paulo State Univ, Modeling & Mol Simulat Grp, UNESP, BR-17033360 Bauru, SP - Brazil
[6] Univ Fed Sao Carlos, Dept Phys, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[7] Sao Paulo State Univ, UNESP, BR-14800900 Araraquara, SP - Brazil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 43, n. 14, p. 6838-6850, APR 5 2018. |
| Web of Science Citations: | 3 |
| Abstract | |
Ordered arrays of TiO2 nanotubes with smooth and rippled morphologies were prepared by one-step titanium oxidation in NH4F and ethylene glycol solution. The samples were then decorated with ZnS using a microwave-assisted solvothermal method. The experiments under constant or pulsed applied voltage resulted in smooth and rippled TiO2 material morphologies, respectively. Field emission scanning electron microscopy, incident photon-to-current efficiency, linear sweep voltammetry and electrochemical impedance spectroscopy were used to investigate the structure and morphology of the TiO2 nanotubes, along with their photoelectrochemical activity in the water splitting reaction. An envelope function was proposed to correlate the anisotropic morphologies and broad distribution of mobility due to the random nature of charge carrier transport. The smooth and rippled morphologies were evaluated using the transmission line model. First-principles quantum mechanical calculations based on the density functional theory at the B3LYP level are conducted to obtain a better understanding of optical properties of TiO2. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 12/06778-0 - Electrochemical synthesis of TiO2 nanotubes and its anodic dopping |
| Grantee: | Milli Aline Sant Anna |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |
| FAPESP's process: | 12/22823-6 - Nanocrystalline metal sulphides obtained by synthesis at the interface of two solvents assisted by microwave |
| Grantee: | Yuri Vinicius Bruschi de Santana |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 10/05555-2 - Electrochemical investigation of TiO2-nanotubes formation and its application on energy convertion nanostructured systems |
| Grantee: | Renato Garcia de Freitas Sobrinho |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |