In Situ Solvothermal Synthesis of CdS-Bi 2MoO 6 Core-Shell Heterostructures with Enhanced Photocatalytic Performance Under Visible Light

15 Pages Posted: 12 Oct 2020

See all articles by Abhijit Kadam

Abhijit Kadam

Gachon University - Department of Chemical and Biological Engineering

Chinna Bathula

Dongguk University - Division of Electronics and Electrical Engineering

Sangwha Lee

Gachon University - Department of Chemical and Biological Engineering

Abstract

Herein, we report the in situ solvothermal synthesis of CdS-Bi2MoO6 core-shell heterostructures (CdS-Bi2MoO6 CSHs) for the photocatalytic elimination of methyl orange (MO) under visible light. The as-synthesized CdS-Bi2MoO6 CSHs exhibited highest photocatalytic performance of 98.5%, which is approximately 10 and 4 folds higher than pristine Bi2MoO6 nanosheets (NSs) and CdS nanorods (NRs), respectively. This significantly enhanced photocatalytic performance is attributed to the core-shell heterostructeure that improves the visible-light harvesting ability, facilitates efficient separation and transfer of the photogenerated charge carriers, as well as synergistic band alignment of both CdS NRs and Bi2MoO6 NSs. The hole (h+) and superoxide radical anion (•O2−) were determined to be the predominant active species accountable for the MO dye degradation. Furthermore, the CdS-Bi2MoO6 CSHs exhibited a satisfactory recycling efficiency over five cycles (reduced by approximately 6%), owing to the protective Bi2MoO6 shell over the CdS NR core, demonstrating their applicability in wastewater purification.

Keywords: Solvothermal process, surface modification, CdS-Bi2 MoO6 CSHs, X-rayphotoelectron spectroscopy (XPS), Photocatalysis

Suggested Citation

Kadam, Abhijit and Bathula, Chinna and Lee, Sangwha, In Situ Solvothermal Synthesis of CdS-Bi 2MoO 6 Core-Shell Heterostructures with Enhanced Photocatalytic Performance Under Visible Light. Available at SSRN: https://ssrn.com/abstract=3708745 or http://dx.doi.org/10.2139/ssrn.3708745

Abhijit Kadam

Gachon University - Department of Chemical and Biological Engineering ( email )

Korea, Republic of (South Korea)

Chinna Bathula

Dongguk University - Division of Electronics and Electrical Engineering ( email )

26 Pil-dong 3-ga
Jung-gu
Seoul, Seoul 100-715
Korea, Republic of (South Korea)

Sangwha Lee (Contact Author)

Gachon University - Department of Chemical and Biological Engineering ( email )

Korea, Republic of (South Korea)

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