TY - JOUR
T1 - Enhanced sunlight photo-catalytic performances of ZnO/ZnNb2O6/Nb2O5 composites for organic pollutant degradation
AU - Essalah, G.
AU - Guermazi, H.
AU - Guermazi, S.
AU - Jedryka, J.
AU - Ozga, K.
AU - Antony, Albin
AU - Rao, A.
AU - Poornesh, P.
N1 - Funding Information:
This research was supported by the Tunisian Ministry of High Education and Scientific Research.Authors gratefully thank the financial support of the Tunisian Ministry of higher education and scientific research.
Funding Information:
Authors gratefully thank the financial support of the Tunisian Ministry of higher education and scientific research .
Funding Information:
This research was supported by the Tunisian Ministry of High Education and Scientific Research .
Publisher Copyright:
© 2023
PY - 2023/4
Y1 - 2023/4
N2 - The current study is focused on the development of zinc oxide-based ternary photo-catalysts that exhibit a good photocatalytic activity in methylene blue (MB) dye degradation, under sunlight irradiation. Indeed, the composites are prepared according to this proportion:(1-x) ZnO/xNb2O5, (x = 0; 0.01; 0.05; 0.1; 0.15; 0.2). In fact, X-ray diffraction patterns demonstrate that, for x = 0.01, a binary composite ZnO/ZnNb2O6 is formed. While ternary composite ZnO/ZnNb2O6/Nb2O5 is formed from x = 0.05. The linear and nonlinear optical properties are studied. So, compared to the ZnO (3.24 eV), the prepared composites exhibit a gap energy red-shift (3.18–3.22 eV), probably due to the interactions between oxide phases. Furthermore, the composites exhibit a high optical conductivity, which proves their high photo-responses. On the other hand, the increase of Nb2O5 amount led to an enhancement of nonlinear properties. Moreover, the photocatalytic tests demonstrate an excellent photocatalytic performance in MB degradation that reaches 100% after 120 min sun-light irradiation. Especially for 5% sample which exhibit also the best kinetic rate. These results allowed us to consider the ZnO/ZnNb2O6/Nb2O5 composites as promising materials for environmental applications.
AB - The current study is focused on the development of zinc oxide-based ternary photo-catalysts that exhibit a good photocatalytic activity in methylene blue (MB) dye degradation, under sunlight irradiation. Indeed, the composites are prepared according to this proportion:(1-x) ZnO/xNb2O5, (x = 0; 0.01; 0.05; 0.1; 0.15; 0.2). In fact, X-ray diffraction patterns demonstrate that, for x = 0.01, a binary composite ZnO/ZnNb2O6 is formed. While ternary composite ZnO/ZnNb2O6/Nb2O5 is formed from x = 0.05. The linear and nonlinear optical properties are studied. So, compared to the ZnO (3.24 eV), the prepared composites exhibit a gap energy red-shift (3.18–3.22 eV), probably due to the interactions between oxide phases. Furthermore, the composites exhibit a high optical conductivity, which proves their high photo-responses. On the other hand, the increase of Nb2O5 amount led to an enhancement of nonlinear properties. Moreover, the photocatalytic tests demonstrate an excellent photocatalytic performance in MB degradation that reaches 100% after 120 min sun-light irradiation. Especially for 5% sample which exhibit also the best kinetic rate. These results allowed us to consider the ZnO/ZnNb2O6/Nb2O5 composites as promising materials for environmental applications.
UR - http://www.scopus.com/inward/record.url?scp=85149184484&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85149184484&partnerID=8YFLogxK
U2 - 10.1016/j.optmat.2023.113637
DO - 10.1016/j.optmat.2023.113637
M3 - Article
AN - SCOPUS:85149184484
SN - 0925-3467
VL - 138
JO - Optical Materials
JF - Optical Materials
M1 - 113637
ER -