TY - JOUR
T1 - Enhanced photocatalytic activity of ZnO nanoparticles by surface modification with KF using thermal shock method
AU - Le, Tien Khoa
AU - Nguyen, Thi Minh Tram
AU - Nguyen, Huu Thinh Pham
AU - Nguyen, Thi Kieu Loan
AU - Lund, Torben
AU - Nguyen, Huu Khanh Hung
AU - Huynh, Thi Kieu Xuan
N1 - 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.
PY - 2020/1
Y1 - 2020/1
N2 - 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.
AB - 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.
KW - KF
KW - Methylene blue
KW - Photocatalytic activity
KW - Thermal shock
KW - ZnO nanoparticles
U2 - 10.1016/j.arabjc.2017.09.006
DO - 10.1016/j.arabjc.2017.09.006
M3 - Journal article
AN - SCOPUS:85029677860
SN - 1878-5352
VL - 13
SP - 1032
EP - 1039
JO - Arabian Journal of Chemistry
JF - Arabian Journal of Chemistry
IS - 1
ER -