A ternary hybrid CdS/SiO2/TiO2 photoanode with enhanced photoelectrochemical activity

Lin Li, Rong Chen, Xun Zhu, Qiang Liao, Dingding Ye, Biao Zhang, Xuefeng He, Long Jiao, Hao Feng and Wei Zhang

Renewable Energy, 2018, vol. 127, issue C, 524-530

Abstract: In this study, a novel ternary hybrid CdS/SiO2/TiO2 film was proposed as the phonoanode for the photocatalytic fuel cell. The samples were characterized by X-ray diffraction, scanning electron microscopy and UV–vis absorption. The photoelectrochemical activity of the ternary hybrid electrode was characterized by the photocurrent-time transient response, linear sweep voltammetry and electrochemical impedance spectroscopy. It was shown that CdS/SiO2/TiO2 yielded much higher photoelectrochemical activity than CdS/TiO2 and bare TiO2 did. The photoanode with CdS/SiO2/TiO2 showed the highest photocurrent density of 4.6 mA cm−2, exhibiting a 40% improvement over the conventional CdS/TiO2 photoanode. The roles of SiO2 and CdS in such a ternary configuration were elaborated. It was demonstrated that CdS could act as an excellent visible light captaturer to generate photo-induced charge carriers, and SiO2 as a passivation layer to suppress the interfacial recombination of electrons and holes. Moreover, SiO2 could allow for more CdS to be deposited at the photoanode owing to its high adsorption capacity. In addition, the effects of the SiO2 content and the SILAR cycle time on the performance of the CdS/SiO2/TiO2 photoanode were investigated. An optimal SiO2 content of 10% could yield the best performance. Increasing the SILAR cycle time could improve the photoelectrochemical activity.

Keywords: Ternary hybrid CdS/SiO2/TiO2; Photocatalytic fuel cell; Photoelectrochemical activity; SiO2 content (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S096014811830538X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:127:y:2018:i:c:p:524-530

DOI: 10.1016/j.renene.2018.05.019

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().