Oxygen Vacancy-Mediated Interfacial Charge Transfer of AuZnO Schottky Heterojunctions for Enhanced UV Photodegradation
Joint Authors
Zhong, Min
Jia, Hui
Zhang, Yufeng
Yang, Xiujuan
Shao, Zhufeng
Chang, Chun
Source
International Journal of Photoenergy
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-07-07
Country of Publication
Egypt
No. of Pages
17
Main Subjects
Abstract EN
We intend to report an interesting phenomenon related to the different interfacial transfer processes between ellipsoidal-like ZnO (E-ZnO) and rod-like ZnO (R-ZnO) nanoheterojunctions witness by the nanosecond time-resolved transient photoluminescence (NTRT-PL) spectra.
Fristly, E-ZnO and R-ZnO nanoarchitectures were fabricated via facilitating the electrochemical route; and then, they decorated it with dispersed Au nanoparticles (NPs) by the methods of ion-sputtering deposition, constituting Au/E-ZnO and Au/R-ZnO Schottky-heterojunction nanocomplex, which is characterized by SEM, XRD, Raman analysis, and UV-vis absorption spectra.
Steady-state photoluminescence and NTRT-PL spectra of as-fabricated Au/E-ZnO and Au/R-ZnO nanocomposites were probed for interfacial charge transfer process under 266 nm femtosecond (fs) light irradiation.
Simultaneously, a distinct diversification for the NTRT-PL spectra is observed, closely associating with oxygen vacancies (Vo), which is confirmed by X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) spectra.
Furthermore, Au NPs act as an “annular bridge” and “transit depot” for interfacial charge transfer through local surface plasmon resonance (LSPR) effect and Schottky barrier, respectively, which is identified by NTRT-PL and time-resolved PL (TRPL) decay spectrum.
Moreover, this mechanism is responsible for the enhanced photoelectrochemical (PEC) performances of methyl orange (MO) photodegradation under UV light irradiation.
American Psychological Association (APA)
Shao, Zhufeng& Jia, Hui& Zhang, Yufeng& Yang, Xiujuan& Zhong, Min& Chang, Chun. 2020. Oxygen Vacancy-Mediated Interfacial Charge Transfer of AuZnO Schottky Heterojunctions for Enhanced UV Photodegradation. International Journal of Photoenergy،Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1173089
Modern Language Association (MLA)
Shao, Zhufeng…[et al.]. Oxygen Vacancy-Mediated Interfacial Charge Transfer of AuZnO Schottky Heterojunctions for Enhanced UV Photodegradation. International Journal of Photoenergy No. 2020 (2020), pp.1-17.
https://search.emarefa.net/detail/BIM-1173089
American Medical Association (AMA)
Shao, Zhufeng& Jia, Hui& Zhang, Yufeng& Yang, Xiujuan& Zhong, Min& Chang, Chun. Oxygen Vacancy-Mediated Interfacial Charge Transfer of AuZnO Schottky Heterojunctions for Enhanced UV Photodegradation. International Journal of Photoenergy. 2020. Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1173089
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1173089