Please use this identifier to cite or link to this item:
Title: Improving photoelectrochemical activity of zno/tio2 core–shell nanostructure through ag nanoparticle integration
Authors: Wang, Zeli
Chen, Zhen
Dan, Jiadong 
Chen, Weiqiang
Zhou, Chenghang 
Shen, Zexiang
Sum, Tze Chien
Wang, Xue-Sen 
Keywords: Carrier lifetime
PEC water splitting
Z-scheme structure
ZnO/Ag/TiO2 heterostructure
Issue Date: 28-Jul-2021
Publisher: MDPI
Citation: Wang, Zeli, Chen, Zhen, Dan, Jiadong, Chen, Weiqiang, Zhou, Chenghang, Shen, Zexiang, Sum, Tze Chien, Wang, Xue-Sen (2021-07-28). Improving photoelectrochemical activity of zno/tio2 core–shell nanostructure through ag nanoparticle integration. Catalysts 11 (8) : 911. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: In solar energy harvesting using solar cells and photocatalysts, the photoexcitation of electrons and holes in semiconductors is the first major step in the solar energy conversion. The lifetime of carriers, a key factor determining the energy conversion and photocatalysis efficiency, is shortened mainly by the recombination of photoexcited carriers. We prepared and tested a series of ZnO/TiO2-based heterostructures in search of designs which can extend the carrier lifetime. Time-resolved pho-toluminescence tests revealed that, in ZnO/TiO2 core–shell structure the carrier lifetime is extended by over 20 times comparing with the pure ZnO nanorods. The performance improved further when Ag nanoparticles were integrated at the ZnO/TiO2 interface to construct a Z-scheme structure. We utilized these samples as photoanodes in a photoelectrochemical (PEC) cell and analyzed their solar water splitting performances. Our data showed that these modifications significantly enhanced the PEC per-formance. Especially, under visible light, the Z-scheme structure generated a photocurrent density 100 times higher than from the original ZnO samples. These results reveal the potential of ZnO-Ag-TiO2 nanorod arrays as a long-carrier-lifetime structure for future solar energy harvesting applications. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Source Title: Catalysts
ISSN: 2073-4344
DOI: 10.3390/catal11080911
Rights: Attribution 4.0 International
Appears in Collections:Elements
Staff Publications

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
10_3390_catal11080911.pdf6.39 MBAdobe PDF



Google ScholarTM



This item is licensed under a Creative Commons License Creative Commons