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Tran Huu H, Thi MDN, Nguyen VP, Thi LN, Phan TTT, Hoang QD, Luc HH, Kim SJ, Vo V. One-pot synthesis of S-scheme MoS 2/g-C 3N 4 heterojunction as effective visible light photocatalyst. Sci Rep 2021; 11:14787. [PMID: 34285258 PMCID: PMC8292365 DOI: 10.1038/s41598-021-94129-0] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 06/29/2021] [Indexed: 02/06/2023] Open
Abstract
Despite pioneering as the holy grail in photocatalysts, abundant reports have demonstrated that g-C3N4 performs poor photocatalytic activity due to its high recombination rate of photo-induced charge carriers. Many efforts have been conducted to overcome this limitation in which the semiconductor-semiconductor coupling strategies toward heterojunction formation were considered as the easiest but the most effective method. Herein, a one-pot solid-state reaction of thiourea and sodium molybdate as precursors at different temperatures under N2 gas was applied for preparing composites of MoS2/g-C3N4. The physicochemical characterization of the final products determines the variation in contents of components (MoS2 and g-C3N4) via the increase of synthesis temperature. The enhanced photocatalytic activity of the MoS2/g-C3N4 composites was evaluated by the degradation of Rhodamine B in an aqueous solution under visible light. Therein, composites synthesized at 500 °C showed the best photocatalytic performance with a degradation efficiency of 90%, much higher than that of single g-C3N4. The significant improvement in photocatalytic performance is attributed to the enhancement in light-harvesting and extension in photo-induced charge carriers' lifetime of composites which are originated from the synergic effect between the components. Besides, the photocatalytic mechanism is demonstrated to well-fit into the S-scheme pathway with apparent evidences.
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Affiliation(s)
- Ha Tran Huu
- grid.444874.f0000 0000 8688 4708Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, 55000 Binh Dinh Vietnam
| | - My Duyen Nguyen Thi
- grid.444874.f0000 0000 8688 4708Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, 55000 Binh Dinh Vietnam
| | - Van Phuc Nguyen
- grid.444874.f0000 0000 8688 4708Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, 55000 Binh Dinh Vietnam
| | - Lan Nguyen Thi
- grid.444874.f0000 0000 8688 4708Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, 55000 Binh Dinh Vietnam
| | - Thi Thuy Trang Phan
- grid.444874.f0000 0000 8688 4708Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, 55000 Binh Dinh Vietnam
| | - Quoc Dat Hoang
- grid.452916.dVietnam Ministry of Science and Technology, 113 Tran Duy Hung, Cau Giay, Hanoi, 10000 Vietnam
| | - Huy Hoang Luc
- grid.440774.40000 0004 0451 8149Faculty of Physics, Hanoi National University of Education, Hanoi, 100000 Vietnam
| | - Sung Jin Kim
- grid.255649.90000 0001 2171 7754Department of Chemistry and Nano Science, Ewha Womans University, Seoul, 120-750 South Korea
| | - Vien Vo
- grid.444874.f0000 0000 8688 4708Faculty of Natural Sciences, Quy Nhon University, 170 An Duong Vuong, Quy Nhon, 55000 Binh Dinh Vietnam
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