Facile construction of S-scheme SnO2/g-C3N4 photocatalyst for improved photoactivity

Kim Nguyen Van; Ha Tran Huu; Viet Nga Nguyen Thi; Thanh Lieu Le Thi; Duy Huong Truong; Thanh Tam Truong; Ngoc Nhiem Dao; Vien Vo; Dai Lam Tran; Yasser Vasseghian

doi:10.1016/j.chemosphere.2021.133120

Facile construction of S-scheme SnO₂/g-C₃N₄ photocatalyst for improved photoactivity

Chemosphere. 2022 Feb:289:133120. doi: 10.1016/j.chemosphere.2021.133120. Epub 2021 Dec 1.

Authors

Affiliations

¹ Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam. Electronic address: nguyenvankim@qnu.edu.vn.
² Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam.
³ Faculty of Education, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam.
⁴ Le Khiet Gifted High School, Quang Ngai, 570000, Viet Nam.
⁵ Institute of Materials Science, Vietnam Academy of Science and Technology, 100000, Viet Nam.
⁶ Faculty of Natural Sciences, Quy Nhon University, Quy Nhon, 55000, Binh Dinh, Viet Nam. Electronic address: vovien@qnu.edu.vn.
⁷ Institute for Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, 11355, Viet Nam; Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Viet Nam. Electronic address: tdlam@itt.vast.vn.
⁸ Department of Chemical Engineering, Quchan University of Technology, Quchan, Iran. Electronic address: y.vasseghian@qiet.ac.ir.

PMID: 34863724
DOI: 10.1016/j.chemosphere.2021.133120

Abstract

The SnO2/g-C3N4 composites were fabricated via an annealing mixture of g-C3N4 and SnO2, which were obtained from calcinating melamine and hydrothermal treatment of SnCl₄ solution, respectively. The photocatalytic properties of g-C3N4/SnO2 were studied over the degradation of Rhodamine B (RhB) under visible light, which exhibits a significantly improved photocatalytic activity compared to the single components, g-C3N4 and SnO2. The enhancement in photocatalytic activity of SnO2/g-C3N4 could be described by the S-scheme pathway, in which the effective charge transfer between components is demonstrated toward the suppression in recombination of the photogenerated electron-hole pairs within redox potential conservation. Besides, a new criterion, photochemical space-time yield, was applied to evaluate the photocatalytic performance of our samples.

Keywords: Photocatalysis; Photochemical space-time yield; S-Scheme; SnO(2); g-C(3)N(4).

MeSH terms

Catalysis
Electrons*
Light*