title: Coupling template nanocasting and self-activation for fabrication of nanoporous carbon.
abstract: Hierarchical nanoporous carbon (NPC) with great surface area and developed pore size distribution has been intently concerned. Herein, we report a facile method coupling template nanocasting and self-activation to fabricate nanoporous carbon with continuous micro, meso and macro pores, in which CaCO3acted as template and activation reagent while the flour was the carbon precursor. Effects of mass ratio of CaCO3to flour and carbonized temperature on the pore structures of NPC were investigated by nitrogen adsorption-desorption isotherms and SEM analysis. Another kind of carbon was prepared by directly mixed powder CaCO3with flour carbonized at 800 °C (NPC-p) to comparatively investigate the pore fabricating mechanism. Results shown that carbonized at 800 °C was favorable to fabricate the continuous macro, meso and micro pores. The resulted NPC in a mass ratio of 1 to 2 had the considerable SBETand VTof 575.4 m2/g and 0.704 cm3/g, respectively. Only surface activation was observed for NPC-p. Nanocasting of the powder CaCO3contributed to fabricate macropores and the CO2activation contributed to meso- and micropores. Coupling activation and nanocasting effect due to the decomposition of CaCO3template into CO2and CaO was ascribed to synthesize the nanoporous carbon.
authors.affiliation: School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, P. R. China.|Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou, 510275, P. R. China.|Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
authors.forename: Lingjun
authors.initials: L
authors.lastname: Kong
authors.affiliation: School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, P. R. China.
authors.forename: Mingxiang
authors.initials: M
authors.lastname: Liu
authors.affiliation: South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
authors.forename: Zenghui
authors.initials: Z
authors.lastname: Diao
authors.affiliation: School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, P. R. China.|Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou, 510275, P. R. China.
authors.forename: Diyun
authors.initials: D
authors.lastname: Chen
authors.affiliation: School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510275, P. R. China.|Guangdong Provincial Key Laboratory of radioactive contamination control and resources, Guangzhou, 510275, P. R. China.
authors.forename: Xiangyang
authors.initials: X
authors.lastname: Chang
authors.affiliation: Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
authors.forename: Ya
authors.initials: Y
authors.lastname: Xiong