2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 8 Mauntz Intl. Symp. Energy Production
| Editors: | F. Kongoli, H. Dodds, S. Atnaw, T. Turna. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 266 pages |
| ISBN: | 978-1-989820-48-3(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Preparation of 1-D Nanowire-Based Composite Photocatalyst Thin Film to Generate Hydrogen by Harvesting Solar Eenergy
Kyo-Seon Kim1;1KANGWON NATIONAL UNIVERSITY, Chuncheon City, South Korea;
Type of Paper: Regular
Id Paper: 68
Topic: 17
Abstract:
Photoelectrochemical (PEC) water splitting using semiconductor photoelectrodes is one of the most promising and environmentally friendly methods to produce hydrogen from water by utilizing renewable solar energy. Enormous efforts are being devoted to find adequate semiconductor materials for photoelectrodes. Tungsten oxide (WO3) is one of the most attractive semiconductor materials for PEC water splitting due to its energetically favorable valence band position for water oxidation, suitable band gap energy (~ 2.6 eV) to harvest considerable light within the solar spectrum (~ 12%), and appreciable photostability in water (< pH 4) [1]. In this study, we developed a facile, economical flame vapor deposition (FVD) process, in which a newly designed double-wire-feeder was incorporated into the flame reactor to realize constant feed rates of two solid precursors. Vertically-aligned nanowire-based sub-stoichiometric tungsten oxide thin films with controllable thickness were prepared with fast growth rate up to few hundred nanometer per minute, which could be converted to photoactive monoclinic WO3 by postannealing. The growth of branched NTs was realized in a FVD system incorporated with double wire feeders. Heterogeneous doping of nanowire and nanotree structures of WO3 was also achieved by this FVD system [2-5]. The PEC measurements with the prepared composite photocatalyst working electrode were carried out using a three-electrode electrochemical custom-built photocell embedded with a quartz window and equipped with saturated calomel electrode as reference electrode and a platinum mesh as counter electrode [3]. The nanostructured composite thin film prepared by FVD with double-wire-feeder in this study showed the better performances for PEC water splitting than those recently reported in the literature.
Keywords:
Coatings; Energy; Sustainability;References:
[1] J.-R. Ding and K.-S. Kim, AIChE J., 62, (2016) 421-428. [2] J.-R. Ding and K.-S. Kim, Chemical Engineering J., 300, (2016) 47-53. [3] J.-R. Ding and K.-S. Kim, Chemical Engineering J., 334, (2018) 1650-1656. [4] J.-R. Ding, S.-H. Yoon, W. Shi and K.-S. Kim, AIChE J., 65 (4), (2019) 1138-1143. [5] S.-H. Yoon and K.-S. Kim, J. Ind. Eng. Chem., 73, (2019) 52-57.