Size-dependent spectroscopic insight into the steady-state and time-resolved optical properties of ZnO photocatalysts

被引：26

作者：

Falamas, Alexandra ^{[1
]}

Marica, Ioana ^{[1
,2
]}

Popa, Adriana ^{[1
]}

Toloman, Dana ^{[1
]}

Pruneanu, Stela ^{[1
]}

Pogacean, Florina ^{[1
]}

Nekvapil, Fran ^{[1
,2
]}

Silipas, Teofil D. ^{[1
]}

Stefan, Maria ^{[1
]}

机构：

[1] Natl Inst Res & Dev Isotop & Mol Technol, 67-103 Donat, Cluj-napoca 400293, Cluj, Romania

[2] Babe ? Bolyai Univ, 1 KogaLniceanu, Cluj-napoca 400084, Cluj, Romania

来源：

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING | 2022年 / 145卷

关键词：

ZnO nanoparticles; Time-correlated single photon counting; Optical properties; Photocatalysis; Reactive oxygen species; COMPOSITE NANOPARTICLES; GLASS SUBSTRATE; THIN-FILMS; PHOTOLUMINESCENCE; MECHANISMS; ELECTRON; NANOSTRUCTURES; LUMINESCENCE; ENHANCEMENT; EMISSION;

D O I：

10.1016/j.mssp.2022.106644

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this paper, we present a spectroscopic insight into the structural and optical properties of ZnO nanoparticles (NPs) applied for water depollution using the photocatalytic process. Samples of various sizes and shapes were synthesized using simple, cost-effective chemical methods. The steady-state optical properties were analyzed using absorption and fluorescence emission spectroscopy and the band-gap and emission energies revealed an inverse dependence on the ZnO particles size. The time-resolved fluorescence properties were studied using time correlated single photon counting (TCSPC) technique. Three emissive states were identified for all ZnO samples, with lifetimes that showed an overall decrease with increasing the particles diameter. The insights into the photocatalytic process toward understanding the ZnO nanoparticles mediated photocatalysis for degradation of Rhodamine (RhB) and oxytetracycline (OTC) was elucidated. The increase of photocatalytic activity was due to charge carrier partition and mobility.

引用

页数：13

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