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Efficient and rapid photocatalytic degradation of methyl orange dye using Al/ZnO nanoparticles

journal contribution
posted on 07.09.2021, 23:36 by Piangjai Peerakiatkhajohn, Teera Butburee, Jung-Hoon SulJung-Hoon Sul, Supphasin Thaweesak, Jung-Ho Yun
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, respectively. 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 electron–hole recombination through an addition of Al metal.

History

Volume

11

Issue

4

Start Page

1

End Page

13

Number of Pages

13

eISSN

2079-4991

Publisher

MDPI AG

Additional Rights

CC BY 4.0

Language

en

Peer Reviewed

Yes

Open Access

Yes

Acceptance Date

19/04/2021

External Author Affiliations

The University of Queensland; Burapha University, National Science and Technology Development Agency, Mahidol University, Thailand

Era Eligible

Yes

Journal

Nanomaterials

Article Number

1059