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论文类型：期刊论文

发表时间：2021-01-10

发表刊物：NEW JOURNAL OF CHEMISTRY

卷号：44

期号：36

页面范围：15403-15409

ISSN号：1144-0546

摘要：Synthesis of monodispersed nanoparticles has been a research frontier in the field of materials chemistry. However, developing a method for controlled synthesis of monodispersed nanoparticles has always been a challenge. Herein, we demonstrate an effective controlled synthesis strategy through simple selection of the reactant used for the polymeric precursor formation of N-doped carbon nanospheres (N-CNs). Specifically, ammonia was introduced into a reaction system that consisted ofpara-phenylenediamine (p-PDA) and formaldehyde (HCHO), and a reaction between ammonia and HCHO occurred preferentially, resulting in controlled release of HCHO, and continuous supply for the reaction ofp-PDA and HCHO at the growth stage, separate from the nucleation event. In this way, controllable formation of monodispersed polymer nanospheres could be achieved, and the size of the nanospheres could be tuned by changing the molar ratio of ammonia to HCHO. The action of ammonia to control HCHO for the synthesis of monodispersed nanospheres has been investigated by UV-visible spectrophotometry and NMR spectroscopy.