Significant research activities have been undertaken in recent years to prepare carbon microspheres because of the widespread applications. The properties of carbon microspheres depend to a large extent not only on the porosity but also on the heteroatoms that decorate their surface. Various methods have been developed for the synthesis of carbon microspheres, such as hydrothermal carbonization of carbohydrate sources, pyrolysis of carbon precursors, chemical vapor deposition of hydrocarbons and extension of the Stober method. Nevertheless, it remains a great challenge to place desired functionalities and to control over their amount within a carbon network for various applications. Herein, we report an effective synthesis strategy of nitrogen-enriched carbon microspheres with uniform and tunable particle size by direct carbonization of polymer microspheres. The carbon microspheres exhibits excellent CO2 adsorption performance of 4.50 mmol g~(-1) at 273 K and 1 bar. Furthermore, CO2 activation could greatly improve the specific surface area of the carbon microspheres, which may extend them into a more wide applications.
展开▼
