Oxygen-mediated formation of MoSx-doped hollow carbon dots for visible light-driven photocatalysis. Issue 38 (15th September 2016)

• Record Type: Journal Article
• Authors: Park, Jung Hyun; Raza, Faizan; Jeon, Su-Ji; Yim, DaBin; Kim, Hye-In; Kang, Tae Woog; Kim, Jong-Ho
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 38(2016)
• Page Start: 14796
• Page End: 14803
• Publication Date: 2016-09-15
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta04278c
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : MoS x -doped hollow carbon dots exhibit outstanding photocatalytic activity in the aerobic oxidative amine coupling reaction at room temperature. Abstract : It is of great interest to modulate the photocatalytic activity of nanomaterials by varying their composition at the atomic scale and their nanostructure. Herein, we demonstrate a bottom-up approach for the synthesis of MoS x -doped hollow carbon dots (MoS HCDs) as a photocatalyst for the visible light-driven aerobic oxidative coupling of amines. The molecular oxygen-assisted solvothermal reaction of a MoS2 nanosheets/ N -methyl-2-pyrrolidone dispersion providedMoS HCDs with a unique hollow interior of 6–7 nm as well as with doping of a large portion of pyridinic N atoms and MoS x . As compared to typical carbon dots not bearing hollow structures, the as-preparedMoS HCDs exhibited excellent photocatalytic activity in the oxidative coupling reactions of various amines under visible light irradiation at 25 °C. Mechanistic investigations suggested that doping with pyridinic N atoms and MoS x was responsible for the significantly improved photocatalytic activity ofMoS HCDs in photocatalysis. The reaction mechanism of the oxidative coupling reactions of amines that were effectively promoted byMoS HCDs under visible light irradiation was also fully examined.