Institute of Physics and Chemistry, Federal University of Itajubá, (IFQ/UNIFEI), BPS Avenue, 1303, ZIP Code 37500-903, Itajubá-MG, Brazil
BibTex Citation Data :
@article{BCREC20211, author = {Hélder Inocêncio Ferreira Correa and Ralf Ricardo Ramalho Jr and Adhimar Flávio Oliveira and Fabio da Silva Lisboa}, title = {Heterobimetallic Zn2+/Co2+ Monocarboxylates as Precursors for ZnO Microparticles Doped with Cobalt and its Photocatalytic Activity in Methyl Orange Oxidation}, journal = {Bulletin of Chemical Reaction Engineering & Catalysis}, volume = {19}, number = {4}, year = {2024}, keywords = {monocarboxylates; dye; zinc oxide; layered materials; degradation}, abstract = { In this work, zinc oxide microparticles doped with cobalt were prepared from two novel layered heterobimetallic monocarboxylates as precursors to obtain uniform shape and size oxide particles, aiming for a photocatalytic removal of methyl orange. Both monocarboxylates produced ZnO doped with Co 2 O 3 after calcination at 700 or 900 °C, in 7 or 12 hours. The particles formed by the laurate precursor presented rectangular prisms shaped, while those formed from stearate were sphere-like particles. All particles ranged from 0.1 to 0.9 μm size, with a direct bandgap of 2.2 to 2.6 eV and an indirect bandgap of 0.25 to 1.70 eV. The ZnO/Co prepared presented photocatalytic activity on methyl orange photodegradation. The solid prepared by the laurate precursor showed a photodegradation rate of 0.00185 min -1 , while the one obtained from the stearate precursor presented a photodegradation rate of 0.00860 min -1 , eight times greater. These results show that the material may be very useful in removing dyes from water samples. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License ( https://creativecommons.org/licenses/by-sa/4.0 ). }, issn = {1978-2993}, pages = {585--598} doi = {10.9767/bcrec.20211}, url = {https://journal.bcrec.id/index.php/bcrec/article/view/20211} }
Refworks Citation Data :
In this work, zinc oxide microparticles doped with cobalt were prepared from two novel layered heterobimetallic monocarboxylates as precursors to obtain uniform shape and size oxide particles, aiming for a photocatalytic removal of methyl orange. Both monocarboxylates produced ZnO doped with Co2O3 after calcination at 700 or 900 °C, in 7 or 12 hours. The particles formed by the laurate precursor presented rectangular prisms shaped, while those formed from stearate were sphere-like particles. All particles ranged from 0.1 to 0.9 μm size, with a direct bandgap of 2.2 to 2.6 eV and an indirect bandgap of 0.25 to 1.70 eV. The ZnO/Co prepared presented photocatalytic activity on methyl orange photodegradation. The solid prepared by the laurate precursor showed a photodegradation rate of 0.00185 min-1, while the one obtained from the stearate precursor presented a photodegradation rate of 0.00860 min-1, eight times greater. These results show that the material may be very useful in removing dyes from water samples. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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