Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The effect of TiO2 nanotube morphological engineering and ZnS quantum dots on the water splitting reaction: A theoretical and experimental study

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: 10/05555-2 - Electrochemical investigation of TiO2-nanotubes formation and its application on energy convertion nanostructured systems
Grantee:Renato Garcia de Freitas Sobrinho
Support type: Scholarships in Brazil - Post-Doctorate
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 type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 12/06778-0 - Electrochemical Synthesis of TiO2 Nanotubes and its Anodic Dopping
Grantee:Milli Aline Sant Anna
Support type: Scholarships in Brazil - Scientific Initiation