Publication: Efficient and rapid photocatalytic degradation of methyl orange dye using al/zno nanoparticles
Issued Date
2021-01-01
Resource Type
ISSN
20794991
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2-s2.0-85104491886
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Mahidol University
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SCOPUS
Bibliographic Citation
Nanomaterials. Vol.11, No.4 (2021)
Suggested Citation
Piangjai Peerakiatkhajohn, Teera Butburee, Jung Hoon Sul, Supphasin Thaweesak, Jung Ho Yun Efficient and rapid photocatalytic degradation of methyl orange dye using al/zno nanoparticles. Nanomaterials. Vol.11, No.4 (2021). doi:10.3390/nano11041059 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/76563
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Title
Efficient and rapid photocatalytic degradation of methyl orange dye using al/zno nanoparticles
Abstract
ZnO and Aluminum doped ZnO nanoparticles (Al/ZnO NPs) were successfully synthesized by the sol-gel method. Together with the effect of calcination temperatures (200, 300 and 400 °C) and Al dosage (1%, 3%, 5% and 10%) on structural, morphological and optical properties of Al/ZnO NPs, their photocatalytic degradation of methyl orange (MO) dye was investigated. The calcination temperatures at 200, 300 and 400 °C in forming structure of ZnO NPs led to spherical nanoparticle, nanorod and nanoflake structures with a well-crystalline hexagonal wurtzite, respec-tively. The ZnO NPs calcined at 200 °C exhibited the highest specific surface area and light absorption property, leading to the MO removal efficiency of 80% after 4 h under the Ultraviolet (UV) light irradiation. The MO removal efficiency was approximately two times higher than the nanoparticles calcined at 400 °C. Furthermore, the 5% Al/ZnO NPs exhibited superior MO removal efficiency of 99% in only 40 min which was approximately 20 times enhancement in photocatalytic activity compared to pristine ZnO under the visible light irradiation. This high degradation performance was attributed to the extended light absorption, narrowed band gap and effective suppression of elec-tron–hole recombination through an addition of Al metal.