Superior supercapacitive performance in porous nanocarbons

Porous nanocarbons with average particle size 20–40 nm were developed using biowaste oil palm leaves as a precursor.Simple pyrolysis was carried out at 700 °C under nitrogen atmosphere.Obtained porous nanocarbons showed excellent porous nature along with spherical shape.Symmetric supercapacitor fabricated from porous nanocarbons showed superior supercapacitance performance where high specific capacitance of 368 F/g at 0.06 A/g in 5 M KOH were reported.It also exhibited high stability(96% over 1700cycles) and energy density of 13 Wh/kg.Low resistance values were obtained by fitting the impedance spectra,thus indicating the availability of these materials as supercapacitors electrode.The presented method is cost effective and also in line with waste to wealth approach.

生物相溶性多孔炭-香豆素复合材料的制备及其细胞成像和靶向给药(英文)

将棕榈叶在惰性气氛中经一步热解过程制备出多孔炭(NPCs),并结合香豆素-6(C-6)形成NPCs-C-6复合荧光染料来进行癌细胞成像及靶向给药。通过XRD和Raman分析可知,NPCs具有高的含碳量。傅里叶红外分析表明棕榈叶中含有纤维素、半纤维素和木质素,这有利于NPCs的形成,以及香豆素-6为导航分子的细胞成像和靶向给药。采用SEM和TEM观察NPCs结合前后的结构形貌,XPS表征元素组成。采用Zeta电位为初始指标来确定颗粒分散质量,以适合生物医学应用。NPCs-C-6分析细胞毒性和成像试验表明,对正常细胞系(MDCK:ATCCCCL-34^(TM))有高的生物相溶性,对人体癌细胞系(A-375∶ATCCCRL-1619TM与N2A∶ATCCCCL-131^(TM))有高的毒性。因此,这些研究结果有望为生物基功能NPCs作治疗载体的研究进展提供新思路。