Analytical Methods in Environmental Chemistry Journal
AMECJ

Photocatalytic degradation of methyl orange using Cerium doped zinc oxide nanoparticles supported bentonite clay

Document Type : Original Article

Authors

Safoura Javan 1
Mohammad Reza Rezaei Kahkha 2
Fahimeh Moghaddam 2
Mohsen Faghihi-Zarandi 3
Anahita Hejazi 4

1 Departement of Environmental Health Engineering, Neyshabur University of Medical Sciences, Neyshabur , Iran

2 Department of Environmental Health Engineering, Zabol University of Medical Sciences, Zabol, Iran

3 Foreign Language Department, Shahid Bahonar University of Kerman, Kerman, Iran

4 Engineering Department of Occupational Health & Safety at Work, Kerman University of Medical Sciences, Kerman, Iran

https://doi.org/10.24200/amecj.v5.i04.216
Abstract
Methyl orange (MO) is a common anionic azo dye that is a serious harmful pollutant to the environmental aquatic systems, so it must be treated before it can be discharged. Photocatalysts are usually semiconducting solid oxides that create an electron-hole pair by absorbing photons. These electron holes can react with molecules on the surface of the particles. Photocatalysts are used in water purification, self-cleaning glasses, the decomposition of organic molecules, etc. Photocatalysts are environmental cleaning materials that remove pollution from surfaces and can destroy organic compounds when exposed to sunlight or fluorescence. The photocatalytic process follows the following principles. Bentonite mineral is a natural adsorbent material that has good adsorption capacity. In this work, zinc oxide nanoparticles doped with cerium were prepared by the sol-gel method (SGM) and deposited on bentonite clay to degrade MO dye. Important parameters that affected degradation efficiency such as contact time, amount of nanocatalyst, and initial dye concentration were investigated and optimized. Results showed that 100% degradation efficiency was obtained at 60 mg of nanocatalyst and 50 mg L-1 of methyl orange in 120 minutes. The Kinetics of the degradation process was consistent with pseudo-second-order and the adsorption isotherm was fitted with the Langmuir model. 

Graphical Abstract

Photocatalytic degradation of methyl orange using Cerium doped zinc oxide nanoparticles supported bentonite clay

Keywords

Photocatalyst
Degradation
Clay
Bentonite
Methyl Orange
Dye
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Analytical Methods in Environmental Chemistry Journal
Volume 5, Issue 4
Autumn 2022
Pages 87-95