The massive conversion of resourceful biomass to carbon nanomaterials not only opens a new avenue to effective and economical disposal of biomass,but provides a possibility to produce highly valued functionalized carb...The massive conversion of resourceful biomass to carbon nanomaterials not only opens a new avenue to effective and economical disposal of biomass,but provides a possibility to produce highly valued functionalized carbon-based electrodes for energy storage and conversion systems.In this work,biomass is applied to a facile and scalable one-step pyrolysis method to prepare three-dimensional(3D)carbon nanotubes/mesoporous carbon architecture,which uses transition metal inorganic salts and melamine as initial precursors.The role of each employed component is investigated,and the electrochemical performance of the attained product is explored.Each component and precise regulation of their dosage is proven to be the key to successful conversion of biomass to the desired carbon nanomaterials.Owing to the unique 3D architecture and integration of individual merits of carbon nanotubes and mesoporous carbon,the as-synthesized carbon nanotubes/mesoporous carbon hybrid exhibits versatile application toward lithium-ion batteries and Zn-air batteries.Apparently,a significant guidance on effective conversion of biomass to functionalized carbon nanomaterials can be shown by this work.展开更多
In this paper, a direction carbonization method was used to prepare porous carbon from Allium cepa for supercapacitor applications. In this method, calcium acetate was used to assist carbonization process. Scanning el...In this paper, a direction carbonization method was used to prepare porous carbon from Allium cepa for supercapacitor applications. In this method, calcium acetate was used to assist carbonization process. Scanning electron microscope （SEM） and N2 adsorption/desorption method were used to characterize the morphology, Brunauer-Emmett-Teller （BET） specific surface area and pore size distribution of porous carbon derived from Allium cepa （onion derived porous carbon, OPC）. OPC is of hierarchical porous structure with high specific surface area and relatively high specific capacitance. OPC possesses relatively high specific surface area of 533.5 m2Jg. What＇s more, OPC possesses a specific capacitance of 133.5 Fig at scan rate of 5 mV/s.展开更多
基金financially supported by the National Key Research and Development Program of China(Grant No.2019YFC1907900)Science&Technology Talents Lifting Project of Hunan Province(Grant No.2022TJ-N16)the Scientific Research Fund of Hunan Provincial Education Department,China(Grant No.21A0392).
文摘The massive conversion of resourceful biomass to carbon nanomaterials not only opens a new avenue to effective and economical disposal of biomass,but provides a possibility to produce highly valued functionalized carbon-based electrodes for energy storage and conversion systems.In this work,biomass is applied to a facile and scalable one-step pyrolysis method to prepare three-dimensional(3D)carbon nanotubes/mesoporous carbon architecture,which uses transition metal inorganic salts and melamine as initial precursors.The role of each employed component is investigated,and the electrochemical performance of the attained product is explored.Each component and precise regulation of their dosage is proven to be the key to successful conversion of biomass to the desired carbon nanomaterials.Owing to the unique 3D architecture and integration of individual merits of carbon nanotubes and mesoporous carbon,the as-synthesized carbon nanotubes/mesoporous carbon hybrid exhibits versatile application toward lithium-ion batteries and Zn-air batteries.Apparently,a significant guidance on effective conversion of biomass to functionalized carbon nanomaterials can be shown by this work.
基金financial support provided by the National Natural Science Foundation of China(No.21573093)National Key Research and Development Program(Nos.2016YFC1102802,2017YFB0307501)Guangdong Innovative and Entrepreneurial Research Team Program(No.2013C092)
文摘In this paper, a direction carbonization method was used to prepare porous carbon from Allium cepa for supercapacitor applications. In this method, calcium acetate was used to assist carbonization process. Scanning electron microscope （SEM） and N2 adsorption/desorption method were used to characterize the morphology, Brunauer-Emmett-Teller （BET） specific surface area and pore size distribution of porous carbon derived from Allium cepa （onion derived porous carbon, OPC）. OPC is of hierarchical porous structure with high specific surface area and relatively high specific capacitance. OPC possesses relatively high specific surface area of 533.5 m2Jg. What＇s more, OPC possesses a specific capacitance of 133.5 Fig at scan rate of 5 mV/s.
