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

被引：24

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

共 63 条

[1] Ahmed M. A., 2019, Environmental Nanotechnology, Monitoring and Management, V12, P313, DOI 10.1016/j.enmm.2019.100217
[2] Synthesis of Gd/N co-doped ZnO for enhanced UV-vis and direct solar-light-driven photocatalytic degradation
Alanazi, Hamdah S.
Ahmad, Naushad
Alharthi, Fahad A.
[J]. RSC ADVANCES, 2021, 11 (17) : 10194 - 10202
[3] Synthesis, properties and uses of ZnO nanorods: a mini review
Aspoukeh, Peyman K.
Barzinjy, Azeez A.
Hamad, Samir M.
[J]. INTERNATIONAL NANO LETTERS, 2022, 12 (02) : 153 - 168
[4] Defects induced luminescence and tuning of bandgap energy narrowing in ZnO nanoparticles doped with Li ions
Awan, Saif Ullah
Hasanain, S. K.
Jaffari, G. Hassnain
Anjum, D. H.
Qurashi, Umar S.
[J]. JOURNAL OF APPLIED PHYSICS, 2014, 116 (08)
[5] ELECTRON ELECTRON AND ELECTRON-HOLE INTERACTIONS IN SMALL SEMICONDUCTOR CRYSTALLITES - THE SIZE DEPENDENCE OF THE LOWEST EXCITED ELECTRONIC STATE
BRUS, LE
[J]. JOURNAL OF CHEMICAL PHYSICS, 1984, 80 (09) : 4403 - 4409
[6] Influence of precursor age on defect states in ZnO nanorods
Buryi, M.
Babin, V.
Chang, Y. -Y.
Remes, Z.
Micova, J.
Simek, D.
[J]. APPLIED SURFACE SCIENCE, 2020, 525
[7] Photoactivity under visible light of defective ZnO investigated by EPR spectroscopy and photoluminescence
Cerrato, Erik
Paganini, Maria Cristina
Giamello, Elio
[J]. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 2020, 397
[8] Hierarchically structured ZnO film for dye-sensitized solar cells with enhanced energy conversion efficiency
Chou, Tammy P.
Zhang, Qifeng
Fryxell, Glen E.
Cao, Guozhong
[J]. ADVANCED MATERIALS, 2007, 19 (18) : 2588 - +
[9] Origin of green luminescence in hydrothermally grown ZnO single crystals
Cizek, J.
Valenta, J.
Hruska, P.
Melikhova, O.
Prochazka, I.
Novotny, M.
Bulir, J.
[J]. APPLIED PHYSICS LETTERS, 2015, 106 (25)
[10] ZnO for application in photocatalysis: From thin films to nanostructures
Di Mauro, Alessandro
Fragala, Maria Elena
Privitera, Vittorio
Impellizzeri, Giuliana
[J]. MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2017, 69 : 44 - 51

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