Department of Analytical Chemistry/Biochemistry and Structural Biology, Center for Molecular Protein Science, Lund University, PO Box 124, SE-22100 Lund, Sweden.
Bioresour Technol. 2013 Mar;132:121-6. doi: 10.1016/j.biortech.2012.12.180. Epub 2013 Jan 7.
The electrospun carbon nanofibers obtained from polyacrylonitrile (PAN) and PAN blends with either activated carbon (PAN-AC) or graphite (PAN-GR) were tested as anodes using Shewanella oneidensis MR-1. Extensive physico-chemical and electrochemical characterization confirmed their formation, their fibrous and porous nature, and their suitability as electrodes. N2 adsorption measurements revealed high specific surface area (229.8, 415.8 and 485.2m(2) g(-1)) and porosity (0.142, 0.202 and 0.239cm(3)g(-1)) for PAN, PAN-AC and PAN-GR, respectively. The chronoamperometric measurements showed a considerable decrease in start-up time and more than a 10-fold increase in the generation of current with these electrodes (115, 139 and 155μAcm(-2) for PAN, PAN-AC and PAN-GR, respectively) compared to the graphite electrode (11.5μAcm(-2)). These results indicate that the bioelectrocatalysis benefits from the blending of PAN with activated or graphitized carbonaceous materials, presumably due to the increased specific surface area, total pore volume and modification of the carbon microstructure.
由聚丙烯腈 (PAN) 以及与活性炭 (PAN-AC) 或石墨 (PAN-GR) 混合制成的静电纺丝碳纳米纤维被用作希瓦氏菌属 (Shewanella oneidensis MR-1) 的阳极进行测试。广泛的物理化学和电化学特性证实了它们的形成、纤维状和多孔性质，以及它们作为电极的适用性。N2 吸附测量表明，PAN、PAN-AC 和 PAN-GR 的比表面积分别为 229.8、415.8 和 485.2m(2)g(-1)，孔隙率分别为 0.142、0.202 和 0.239cm(3)g(-1)。计时安培测量表明，与石墨电极 (11.5μAcm(-2)) 相比，这些电极的启动时间明显缩短，电流生成增加了 10 多倍（PAN、PAN-AC 和 PAN-GR 分别为 115、139 和 155μAcm(-2))。这些结果表明，生物电化学催化受益于 PAN 与活性炭或石墨质材料的混合，这可能是由于比表面积、总孔体积增加以及碳微结构的改性。
