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

Loại tài liệu:

Article

Tác giả:

Le Tien Khoa

Đề mục:

Arabian Journal of Chemistry

Nhà xuất bản:

Elsevier Ltd.

Ngày xuất bản:

January 2020

Định dạng:

pdf

Nguồn gốc:

Arabian Journal of Chemistry, Volume 13, Issue 1, January 2020, Pages 1032-1039

Ngôn ngữ:

eng

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Nội dung

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.

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

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