Article (Scientific journals)
Significantly enhancement of sunlight photocatalytic performance of ZnO by doping with transition metal oxides
Ramírez S., Alfonso E.; Montero-Muñoz, Marly; López, Lizbeth L. et al.
2021In Scientific Reports, 11, p. 2804
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Keywords :
Photocatalysis; sunlight; ZnO; metal oxides doping
Abstract :
[en] In this study we report, the synthesis of ZnO and its doping with Transition Metal Oxides -TMO-, such as Cr2O3, MnO2, FeO, CoO, NiO, Cu2O and CuO. Various characterization techniques were employed to investigate the structural properties. The X-ray diffraction (XRD) data and Rietveld refinement confirmed the presence of TMO phases and that the ZnO structure was not affected by doping with TMO which was corroborated using transmission Electron microscopy (TEM). Surface areas were low due to blockage of adsorption sites by particle aggregation. TMO doping concentration range was 3.7-5.1% and was important to calculate the catalytic activity. The UV–Visible spectra showed the variation in the band gap of TMO/ZnO ranging from 3.45 to 2.46 eV. The surface catalyzed decomposition of H2O2 was used as model reaction to examinate the photocatalytic activity following the oxygen production and the systems were compared to bulk ZnO and commercial TiO2-degussa (Aeroxyde-P25). The results indicate that introduction of TMO species increase significantly the photocatalytic activity. The sunlight photocatalytic performance in ZnO-doped was greater than bulk-ZnO and in the case of MnO2, CoO, Cu2O and CuO surpasses TiO2 (P25-Degussa). This report opens up a new pathway to the design of high-performance materials used in photocatalytic degradation under visible light irradiation.
Disciplines :
Materials science & engineering
Chemistry
Chemical engineering
Author, co-author :
Ramírez S., Alfonso E.;  Universidad del Cauca, Popayán - Cauca, Colombia > Departmento de Química > Grupo de Catalisis
Montero-Muñoz, Marly;  University of Brasilia, Brazil > Institute of Physics
López, Lizbeth L.;  Universidad Santiago de Cali, Cali-Colombia > Facultad de Ciencias Básicas > Grupo de Investigación en Electroquı́mica y Medio Ambiente
Ramos- Ibarra, J.E.;  University of Brasilia, Brazil > Institute of Physics
Coaquira, Jose A.H.;  University of Brasilia, Brazil > Institute of Physics
Heinrichs, Benoît ;  Université de Liège - ULiège > Department of Chemical Engineering > Génie chimique - Nanomatériaux et interfaces
Páez Martinez, Carlos ;  Université de Liège - ULiège > Chemical Engineering
Language :
English
Title :
Significantly enhancement of sunlight photocatalytic performance of ZnO by doping with transition metal oxides
Publication date :
2021
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
11
Pages :
2804
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 29 November 2020

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