Etching treatment of vertical WO3 nanoplates as a photoanode for enhanced photoelectrochemical performance

Zhao, Zhefei, Butburee, Teera, Lyv, Miaoqiang, Peerakiatkhajohn, Piangjai, Wang, Songcan, Wang, Lianzhou and Zheng, Huajun (2016) Etching treatment of vertical WO3 nanoplates as a photoanode for enhanced photoelectrochemical performance. RSC Advances, 6 72: 68204-68210. doi:10.1039/c6ra11750c


Author Zhao, Zhefei
Butburee, Teera
Lyv, Miaoqiang
Peerakiatkhajohn, Piangjai
Wang, Songcan
Wang, Lianzhou
Zheng, Huajun
Title Etching treatment of vertical WO3 nanoplates as a photoanode for enhanced photoelectrochemical performance
Formatted title
Etching treatment of vertical WO3 nanoplates as a photoanode for enhanced photoelectrochemical performance
Journal name RSC Advances   Check publisher's open access policy
ISSN 2046-2069
Publication date 2016-01-01
Year available 2016
Sub-type Article (original research)
DOI 10.1039/c6ra11750c
Open Access Status Not yet assessed
Volume 6
Issue 72
Start page 68204
End page 68210
Total pages 7
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Formatted abstract
Vertically grown WO3 nanoplates (WO3NP) were successfully fabricated by a one-step hydrothermal process using citric acid as a structure directing agent. An innovative etching method was developed to obtain increased surface voids, active crystal facets and surface groups simultaneously, which led to a remarkably improved photocurrent density of ∼1.2 mA cm-2 at 1.23 V vs. RHE, compared to 0.97 mA cm-2 of pristine WO3. Incident photon to current efficiency (IPCE) measurements also displayed a substantive increase of photoresponse in the intrinsic absorption range. Interestingly, a lower onset potential can be obtained after etching which is caused by the change of conduction and valence band positions. Moreover, the photoelectrocatalytic activity of WO3 for degrading methylene blue (MB) was also evaluated. This effective design could provide a promising method to enhance the efficiency of photoelectrochemical performance based on WO3 photoanodes.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
HERDC Pre-Audit
Australian Institute for Bioengineering and Nanotechnology Publications
 
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