Confined pyrolysis of a dye pollutant for two-dimensional F, N, S tri-doped nanocarbon as a high performance oxidative coupling reaction catalyst. Issue 22 (20th October 2020)

• Record Type: Journal Article
• Authors: Liu, Sijie; Chen, Sian; Yu, Ao; Hu, Yajing; Yu, Bingzhe; Wang, Haining; Peng, Ping; Li, Fang-Fang
• Is Part Of: Green chemistry. Volume 22:Issue 22(2020)
• Page Start: 7839
• Page End: 7847
• Publication Date: 2020-10-20
• Subjects: Environmental chemistry -- Industrial applications -- Periodicals; Environmental management -- Periodicals; 660
• DOI: 10.1039/d0gc02040k
• Languages: English
• ISSNs: 1463-9262

Abstract

Abstract : Two-dimensional F, N, S tri-doped nanocarbon was synthesized by confined pyrolysis of a dye pollutant and utilized as a high efficient metal-free catalyst for oxidative coupling of amines. Abstract : Nanocarbon materials as metal-free catalysts for the oxidative coupling of primary amines to imines suffer from high catalyst loading, low reaction rate and high oxygen demand. Doping heteroatoms in nanocarbons is realized as an effective strategy to improve the catalytic activity, however, the doping of fluorine has been rarely studied. Here we synthesized a F, N, S tri-doped hierarchical nanocarbon (FNSHC) by pyrolyzing a fluorine-containing azo-sulphonate dye (acid red-337, a pollutant in wastewater) confined in a layered double hydroxide (LDH). The LDH-confined synthetic method is beneficial to the formation of a two-dimensional porous structure with a large specific surface area (∼1432 m 2 g −1 ) and high fluorine content, enabling remarkable catalytic performance (98% yield in 4 h at 2 wt% catalyst loading under open-air conditions) and high recyclability, outcompeting current metal-free carbocatalysts. The conversion of environmental pollutants into heteroatom-doped carbon materials provides a new green strategy for the design and synthesis of functional carbon catalysts.