Porous graphitic materials obtained from carbonization of organic xerogels doped with transition metal salts

Bulletin of materials science

M Bystrzejewski¹  T Gemming²  W KiciÅ„ski⁴  M H Rümmeli³ 

[1] Department of Chemistry, Warsaw University, Pasteur 1, 02-093 Warsaw, Poland$$Department of Chemistry, Warsaw University, Pasteur 1, 02-093 Warsaw, PolandDepartment of Chemistry, Warsaw University, Pasteur 1, 02-093 Warsaw, Poland$$;IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany$$ IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany IFW Dresden, Helmholtzstr. 20, 01069 Dresden, Germany$$;IBS Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Daejon 305-701, Republic of Korea$$Department of Energy Science, Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea$$IBS Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Daejon 305-701, Republic of KoreaIBS Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Daejon 305-701, Republic of Korea$$Department of Energy Science, Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea$$Department of Energy Science, Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of KoreaIBS Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Daejon 305-701, Republic of Korea$$Department of Energy Science, Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea$$;Institute of Chemistry, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland$$Institute of Chemistry, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, PolandInstitute of Chemistry, Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland$$

关键词: Organic xerogel;    carbon xerogel;    graphitization;    mesoporosity;    solâ€�?�gel synthesis.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Porous carbons with a well developed graphitic phase were obtained via the pyrolysis of FeCl₃-, NiCl₂-, and CoCl₂-doped organic xerogels. Doping was realized through salt solubilization in a water/methanol solution of resorcinol and furfural. Carbon xerogels with tailored particles, porous morphology and various degrees of graphitization were obtained depending of the water/methanol ratio and the salt content and type in the starting solution of substrates. When obtained via pyrolysis, carbon xerogels retain the overall open-celled structure exhibiting depleted microporosity and a well-developed mesoporic region that expands into macropores. The removal of metal leads to carbon xerogels with specific surface areas between 170 and 585 m²/g and pore volume up to 0.76 cm³/g. The possibility of enhancing the porosity of xerogels via templating with colloidal silica was also investigated. It was assumed that from the three investigated salts, FeCl₃ makes the best choice for graphitization catalyst precursor to obtain uniformly graphitized mesoporous carbon xerogels. The obtained carbon samples were characterized by means of SEM, TEM, X-ray diffraction, Raman spectroscopy, N₂ physisorption and thermogravimetric analysis.

【 授权许可】

Unknown