Monodisperse Ultrahigh Nitrogen‐Containing Mesoporous Carbon Nanospheres from Melamine‐Formaldehyde Resin. Issue 5 (4th February 2021)

• Record Type: Journal Article
• Authors: Guo, Dingyi; Fu, Yubin; Bu, Fanxing; Liang, Haichen; Duan, Linlin; Zhao, Zaiwang; Wang, Changyao; El‐Toni, Ahmed Mohamed; Li, Wei; Zhao, Dongyuan
• Is Part Of: Small methods. Volume 5:Issue 5(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-02-04
• Subjects: carbon nanospheres -- mesoporous materials -- polymers -- self‐assembly -- ultrahigh nitrogen content; Nanotechnology -- Methodology -- Periodicals; Nanotechnology -- Periodicals; Periodicals; 620.5028
• DOI: 10.1002/smtd.202001137
• Languages: English
• ISSNs: 2366-9608

Abstract

Abstract: An aqueous emulsion polymerization self‐assembly approach is demonstrated for the first time to synthesize ultrahigh nitrogen containing mesoporous polymer nanospheres, using melamine‐formaldehyde resin oligomers as precursors. In the synthesis, change from alkaline to acidic conditions is critical for the formation of monodisperse mesostructured polymer nanospheres. Owing to unique structure of triazine stabilized in the covalent polymeric networks during the pyrolysis process, the derived mesoporous carbon nanospheres possess an ultrahigh nitrogen content (up to 15.6 wt%) even after pyrolysis at 800 °C, which is the highest nitrogen content among mesoporous carbon nanospheres. Furthermore, these monodisperse mesoporous carbon nanospheres possess a high surface area (≈883 m 2 g −1 ) and large pore size (≈8.1 nm). As an anode for sodium‐ion batteries, the ultrahigh nitrogen‐containing mesoporous carbon nanospheres exhibit superior rate capability (117 mAh g −1 at a high current density of 3 A g −1 ) and high reversible capacity (373 mAh g −1 at 0.06 A g −1 ), indicating a promising material for energy storage. Abstract : Monodisperse mesoporous carbon nanospheres are synthesized by an aqueous emulsion polymerization self‐assembly strategy. The step process from alkaline to acidic condition is the key for the synthesis. The mesoporous carbon nanospheres possess an ultrahigh nitrogen content (15.6 wt%), tunable diameters (≈20–80 nm), and large pore sizes (≈6.7–8.1 nm).