Enhanced photocatalytic activity of ZnO nanoparticles by surface modification with KF using thermal shock method

Tien Khoa Le, Thi Minh Tram Nguyen, Huu Thinh Pham Nguyen, Thi Kieu Loan Nguyen, Torben Lund, Huu Khanh Hung Nguyen, Thi Kieu Xuan Huynh*

*Corresponding author

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review


ZnO nanoparticles were modified with KF using thermal shock method at various temperatures in order to improve the photocatalytic activity of ZnO under both UVA and visible light irradiation. The influences of KF-modification on the crystal structure, morphology, UV–visible absorption, specific surface area as well as surface structure of ZnO were respectively characterized by XRD, FE-SEM, UV–Visible diffuse reflectance, N2 adsorption and XPS spectroscopy. The photocatalytic activity was evaluated via the degradation of methylene blue under UVA irradiation. According to the results, the thermal shock process with KF did not modify the structure, the particle size and the optical properties of ZnO nanoparticles but successfully increase their UVA and visible light induced photocatalytic activity. This enhancement of activity may be attributed to the increase of surface hydroxyl groups and zinc vacancies of modified ZnO samples.

TidsskriftArabian Journal of Chemistry
Udgave nummer1
Sider (fra-til)1032-1039
Antal sider8
StatusUdgivet - jan. 2020

Bibliografisk note

Funding Information:
The authors acknowledge The World Academy of Sciences (TWAS) for their supports under grant number 15-106 RG/CHE/AS_G – FR3240287033 .
under grant number B2017-18-08.

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