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http://hdl.handle.net/10773/20755
Título: | Gelatin-assisted sol-gel derived TiO2 microspheres for hydrogen storage |
Autor: | Liu, Bin Xiao, Jingzhong Xu, Lan Yao, Yijun Costa, Benilde F. O. Domingos, Valdemar F. Ribeiro, Edivagner S. Shi, Fa-Nian Zhou, Kai Su, Jing Wu, Hongyan Zhong, Kun Paixao, Jose A. Gil, Joao M. |
Palavras-chave: | HIGH PHOTOCATALYTIC ACTIVITY NANOCRYSTALLINE TIO2 CRYSTALLINE FRAMEWORK HOLLOW MICROSPHERES DISPERSANTS FILMS |
Data: | 2015 |
Editora: | PERGAMON-ELSEVIER SCIENCE LTD |
Resumo: | TiO2 is an important photocatalyst candidate for solar energy or hydrogen energy harvesting. Creation of porous structures or high surface area within TiO2 microspheres may potentially address the challenge to improve their efficiency. In present work, we report the sol-gel fabrication of mesoporous TiO2 microspheres that assembled from nanoparticles with the assistance of gelatin template. The phase structure, morphology, and mesoporous characteristics were analyzed by X-ray diffraction, transmission electron microscopy, and BET measurements. Particularly, the gelatin-assisted fabricated TiO2 nanoparticles (similar to 10-20 nm) were achieved to assemble TiO2 microspheres with diameters of 0.2-0.5 mu m, which yielded a typical type-IV BET isotherm curve (N-2 hysteresis loop) with a large surface area of 98.3 m(2)/g and a small pore size of 11.9 nm. A simplified model was proposed to investigate the effect mechanism of gelatin on the formation of TiO2 mesoporous microspheres. The room temperature pressure-dependent hydrogen evolution of the gelatin-assisted fabricated TiO2 nanostructures has also been investigated, suggesting that gelatin favors high surface area and improves the hydrogen storage performance, and the achieved TiO2 microspheres could be potential candidates to be utilized as the photocatalyst for hydrogen evolution. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/20755 |
DOI: | 10.1016/j.ijhydene.2015.01.102 |
ISSN: | 0360-3199 |
Versão do Editor: | 10.1016/j.ijhydene.2015.01.102 |
Aparece nas coleções: | CICECO - Artigos |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Gelatin-assisted sol-gel derived TiO2 microspheres for hydrogen storage_10.1016j.ijhydene.2015.01.102.pdf | 1.05 MB | Adobe PDF |
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