Synthesis And Application Of Hierarchical Porous Carbon Materials

Porous carbon materials with abundant pore structure, high surface area, good thermal stability and chemical stability, are widely used in adsorption and separation,catalyst supports and electrochemical double layer, etc. In this paper, the carbon material as the center, we extend the morphology and modified and the pores of the carbon material and research the application of carbon materials in this paper.The results are showed as follows:1)Using resorcinol and formaldehyde as carbon source, and ammonia as catalyst, the carbon spheres have been synthesized in the ethanol-water system. TEOS has been addded in synthesis process to enlarge the pore structure of carbon spheres and the material have been applied to the CO2 adsorption. The silicon source proved beneficial to increase the specific surface area and is good for adsorption capacity. The Chemical modification method of N in suit can also increase the absorption properties of porous carbon. In this paper certain proportion of melamine as a nitrogen source is added during the synthesis process. Chemical modification of the material can proved basic groups in nitrogen-doped carbon spheres. FI-IR show that nitrogen entry into the carbon matrix successfully and the carbon spheres maintain a good spherical morphology. The nitrogen-doped carbon spheres are prepared for carbon dioxide absorption. The adsorption datas show excellent performance of acidic gases that the porous carbon spheres and nitrogen-doped carbon will have a good application in the future.2) The extension St?ber is used to synthesis silica spheres and form colloidal crystal template under gravity. The colloidal crystal is a template, high nitrogen content of the ionic liquid chlorinated 1- acetonitrile-3-methyl imidazolium as carbon source and source.While the ionic liquid as a soft template to create mesoporous in the nitrogen-doped carbon spheres. The XPS analysis the nitrogen present in the sample and the nitrogen content of the carbon surface up to 6.67 at%. In addition Characterized by nitrogen adsorption-desorption technology is that there are two dimensions of mesoporous materials the focus in 3.3 nm and 30.2 nm. The pore structure of the carbon material with rich rules and high nitrogen content can prove a way for transmission and transfer of particles, and a high nitrogen content such that increased carbon material wettability. The porous carbon exhibit excellent electrochemical properties in supercapacitors.3) A simple method is employed to prepare graphitic carbon spheres. The extensionSt?ber is used to synthesis phenolic resin spheres with resorcinol and formaldehyde as carbon source. The graphitic carbon spheres is prepared with K3[Fe(CN)6] catalytic graphitization of resorcinol/formaldehyde precursors. The graphitic carbon spheres have a and a high degree of graphitization structure with diameter of 625 nm. Also, GCS-1000 have a characteristic structure with a high surface area(381 m2/g) and large pore volume(0.45 cm3/g). Since the material highly graphitized and significant multi-stage pore structure that GSC-1000 exhibits good performance as the supercapacitor.