Highly efficient photodegradation of toxic organic pollutants using Cu-doped V2O5 nanosheets under visible light

Ch Venkata Reddy; Raghava Reddy Kakarla; Bai Cheolho; Jaesool Shim; Mashallah Rezakazemi; Tejraj M Aminabhavi

doi:10.1016/j.chemosphere.2022.137015

Highly efficient photodegradation of toxic organic pollutants using Cu-doped V₂O₅ nanosheets under visible light

Chemosphere. 2023 Jan;311(Pt 1):137015. doi: 10.1016/j.chemosphere.2022.137015. Epub 2022 Oct 28.

Authors

Ch Venkata Reddy¹, Raghava Reddy Kakarla², Bai Cheolho³, Jaesool Shim⁴, Mashallah Rezakazemi⁵, Tejraj M Aminabhavi⁶

Affiliations

¹ School of Engineering, Yeungnam University, Gyeongsan, 712749, South Korea.
² School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW 2006, Australia. Electronic address: reddy.chem@gmail.com.
³ School of Engineering, Yeungnam University, Gyeongsan, 712749, South Korea. Electronic address: chbai@yu.ac.kr.
⁴ School of Engineering, Yeungnam University, Gyeongsan, 712749, South Korea. Electronic address: jshim@ynu.ac.kr.
⁵ Faculty of Chemical and Materials Engineering, Shahrood University of Technology, Shahrood, Iran.
⁶ School of Advanced Sciences, KLE Technological University, Hubballi, 580031, Karnataka, India; Department of Biotechnology, Engineering and Food Technology, Chandigarh University, Mohali, Punjab, 140 413 India. Electronic address: aminabhavit@gmail.com.

PMID: 36342024
DOI: 10.1016/j.chemosphere.2022.137015

Abstract

Photodegradation of organic pollutants using metal oxides has shown extraordinary promise owing to the catalytic efficacy, low cost, less noxiousness, and good chemical constancy. In this research, pure and transition metal ions (Cu)-doped V₂O₅ nanosheets were synthesized and investigated for their photocatalytic efficiency using methyl blue (MB) and rhodamine B (RhB) organic dye pollutants under visible light irradiation. The orthorhombic crystal phase was confirmed by XRD analysis, which exhibited a stable phase upon incorporating Cu dopant ions. Optical properties were examined using optical absorption spectroscopy, while a reduced band gap was observed in the doped V₂O₅ nanosheets over the undoped sample. EIS analysis confirmed lower charge resistance in doped V₂O₅ nanosheets. The Cu dopant incorporation into the host matrix considerably enhanced photodegradation efficiency for MB and RhB impurities under light illumination. The improvement in catalytic efficacy is attributed to dopant ions that can separate photoinduced charge carriers and the quick movement of the charge. Moreover, comparatively lesser crystalline size, improved specific surface area, and hydroxyl group onto the catalyst surface are quite advantageous to offer better photocatalytic activity of Cu-doped V₂O₅ nanosheets.

Keywords: Doping; Environmental remediation; Hazardous chemical pollutants; Photocatalysis; Photodegradation; V(2)O(5) nanosheets; Water treatment.

MeSH terms

Catalysis
Coloring Agents / chemistry
Environmental Pollutants* / analysis
Light
Photolysis

Substances

Environmental Pollutants
Coloring Agents