Strategic rationalization for improved photocatalytic decomposition of toxic pollutants: Immobilizing Bi2Te3 nanorods and V2O5 nanoparticles over MoS2 nanosheets

Govindasamy Palanisamy; Kandasamy Bhuvaneswari; Jintae Lee; A Viji; Mohd Shkir

doi:10.1016/j.saa.2023.123400

Strategic rationalization for improved photocatalytic decomposition of toxic pollutants: Immobilizing Bi₂Te₃ nanorods and V₂O₅ nanoparticles over MoS₂ nanosheets

Spectrochim Acta A Mol Biomol Spectrosc. 2024 Jan 5:304:123400. doi: 10.1016/j.saa.2023.123400. Epub 2023 Sep 12.

Authors

Govindasamy Palanisamy¹, Kandasamy Bhuvaneswari², Jintae Lee³, A Viji⁴, Mohd Shkir⁵

Affiliations

¹ School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea. Electronic address: palanisamyg@yu.ac.kr.
² Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand. Electronic address: bhuviphy11@gmail.com.
³ School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, Republic of Korea.
⁴ Department of Physics, Kongunadu College of Engineering and Technology, Thottiyam 621215, Tamil Nadu, India.
⁵ Department of Physics, College of Science, King Khalid University, Abha 61413, Saudi Arabia.

PMID: 37738763
DOI: 10.1016/j.saa.2023.123400

Abstract

Researchers have become increasingly interested in solar energy based on semiconductor photocatalysts to remove hazardous pollutants and clean the environment. In this work, an efficient MoS₂-Bi₂Te₃-V₂O₅ nanocomposite has been prepared through wet impregnation method. MoS₂-Bi₂Te₃-V₂O₅ photocatalyst was utilized to decompose the MB and Rh B dyes. The photocatalytic efficiency (Rh B) of MoS₂-Bi₂Te₃-V₂O₅ nanocomposite (95.19 %) was higher than 2.70 times of Bi₂Te₃ nanorods, 1.55 times of V₂O₅ nanoparticles, 1.68 times of MoS₂ nanosheets, 1.50 times of MoS₂-Bi₂Te_3, and 1.21 times of MoS₂-V₂O₅ nanocomposite, respectively. Recycling tests conducted on the MoS₂-Bi₂Te₃-V₂O₅ nanocomposite revealed its high stability and durability. The outcomes obtained from the scavenger test suggest that the photogenerated hydroxyl radicals play a chief role in the photocatalytic performance of Rh B dye in the MoS₂-Bi₂Te₃-V₂O₅ nanocomposite, respectively. The enhanced photocatalytic performance of the MoS₂-Bi₂Te₃-V₂O₅ nanocomposite is ascribed to the strong hybrid formation of Bi₂Te₃, V₂O₅, and MoS₂ nanosheets, respectively. Consequently, the straightforward and readily synthesized MoS₂-Bi₂Te₃-V₂O₅ nanocomposite can serve as an economical, highly effective material for environmental applications.

Keywords: Hydroxyl radicals; MB dye; MoS(2)-Bi(2)Te(3)-V(2)O(5) nanocomposite; Rh B dye; Visible light.