Gelatin-assisted sol-gel derived TiO2 microspheres for hydrogen storage
authors Liu, B; Xiao, JZ; Xu, L; Yao, YJ; Costa, BFO; Domingos, VF; Ribeiro, ES; Shi, FN; Zhou, K; Su, J; Wu, HY; Zhong, K; Paixao, JA; Gil, JM
nationality International
journal INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
author keywords Anatase TiO2 nanoparticle; Microspheres; Gelatin; Sol-gel; Hydrogen storage
keywords HIGH PHOTOCATALYTIC ACTIVITY; NANOCRYSTALLINE TIO2; CRYSTALLINE FRAMEWORK; HOLLOW MICROSPHERES; DISPERSANTS; FILMS
abstract 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.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0360-3199
year published 2015
volume 40
issue 14
beginning page 4945
ending page 4950
digital object identifier (doi) 10.1016/j.ijhydene.2015.01.102
web of science category Chemistry, Physical; Electrochemistry; Energy & Fuels
subject category Chemistry; Electrochemistry; Energy & Fuels
unique article identifier WOS:000352666600026
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journal impact factor 4.939
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