文摘
Carbonaceous nanospheres (CNSs) synthesized from hydrothermal carbonization of glucose were facilely modified with quaternary ammonium polyelectrolytes (QAPs) through a green and high-efficiency strategy, and they were successfully applied in anion-exchange chromatography (AEC). Methylamine and 1,4-butanediol diglycidyl ether were utilized as monomers to start the polymerization for constructing QAPs. The entire synthesis was achieved in water without damage to the monodispersity of CNSs. The water-dispersibility of CNSs was significantly increased after QAP-modification. The QAP-grafted CNSs (QAP-CNSs) were characterized by FTIR, XPS, SEM, TGA, and zeta potential measurement. The functionalization methodology was further extended to produce octadecylamine-modified CNSs, which demonstrated its versatility in preparation of functional carbons. For application in AEC, the QAP-CNSs were adhered on sulfonated poly(styrene-divinylbenzene) (PS-DVB) microspheres by electrostatic interaction. Using the PS-DVB/QAP-CNS composite as anion-exchange phase and potassium hydroxide solution as eluent, seven common anions were efficiently separated with superior stability.