The optical, structural and photoelectrochemical characteristics of porous hematite hollow spheres prepared by DC magnetron sputtering process via polystyrene spheres template

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Title:	The optical, structural and photoelectrochemical characteristics of porous hematite hollow spheres prepared by DC magnetron sputtering process via polystyrene spheres template
Authors:	林景崎;Huang, Mao-Chia;Wang, TsingHai;Wu, Ching-Chen;Chang, Wen-Sheng;Lin, Jing-Chie;Yen, Tzu-Hsiang
Contributors:	工學院材料科學與工程研究所
Keywords:	Hematite (α-Fe2O3);Polystyrene sphere;Porous hollow sphere;PS template;Water splitting
Date:	2014-01-01
Issue Date:	2026-04-23 11:47:32 (UTC+8)
Publisher:	Elsevier Ltd.;Elsevier Ltd
Abstract:	摘要： Porous hematite (α-Fe2O3) hollow sphere structures have been fabricated on fluorine-doped SnO2 (FTO) glass substrate by DC magnetron sputtering process via polystyrene spheres (PS) latex as templates. The influences of deposition time and PS template on optical, structural and photoelectrochemical characteristics have been investigated. The as-obtained samples after annealing in ambient atmosphere were analyzed by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), Raman spectra, UV–visible spectra and electrochemical analysis. After annealing, all samples revealed only hematite characteristics in the Raman spectra. TEM images confirmed the porous hollow sphere structures which deposited for 20 and 30min via PS templates. Based upon our observations, the porous α-Fe2O3 hollow spheres deposited for 30min had a better photoelectrochemical performance with photocurrent density of about 1.4mA/cm2 at 0.6V vs. SCE. This value was about 3 times higher than the no modified film (reference sample). Observed higher photocurrent density was likely due to a hollow sphere structure and a suitable thickness causing a higher charge carrier concentration and a lower charge transfer resistance. 出版者： Elsevier Ltd 出版日期： 2014-08-01 出處： Ceramics international, 2014-08, Vol.40 (7), p.10537-10544 版權： 2014 Elsevier Ltd and Techna Group S.r.l. 識別號： ISSN: 0272-8842 識別號： EISSN: 1873-3956 識別號： DOI: 10.1016/j.ceramint.2014.03.029
Appears in Collections:	[Institute of Materials Science and Engineering] journal & Dissertation

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