Preparation and characterization of N-doped porous carbon derived from chlorinated polypropylene with controllable nitrogen content and specific surface area

Abstract

Here we report a facile method to prepare nitrogen-doped porous carbon with controllable specific surface area and nitrogen content through pretreated chlorinated polypropylene with nitrogen-containing compounds(NCCs). The microstructure and porous textures of the obtained carbons are characterized by BET, SEM, TEM, XRD and Raman, respectively. SEM shows that pore structure can be found in carbon matrix. And with the increase of nitrogen content, more amorphous carbon are observed in Raman spectral. The results show that the specific surface areas are effectively increased from 1000 m2/g to 3269 m2/g when the structure of NCCs have a nitrogen-contained hexatomic ring, and nitrogen content are apparently raised from 1.3 at% to 27.73 at% when the NCCs contain guanidyl structure. Besides, XPS shows that when the nitrogen content is relatively low, nitrogen emerge at carbon matrix mainly in form of pyrrolic-N, and with the increase of nitrogen content, the pyridinic-N become the main structure of nitrogen in carbon.