Department of Pharmaceutical Technology, Adamas University, Barasat - Barrackpore Road, 24 Parganas North, Jagannathpur, Kolkata, West Bengal, 700126, India.
Centre for Nano-materials & Displays, B.M.S. College of Engineering, Basavangudi, Bangalore, 560019, India.
Environ Sci Pollut Res Int. 2021 Mar;28(11):13552-13561. doi: 10.1007/s11356-020-11587-1. Epub 2020 Nov 13.
Porous carbon nanospheres were synthesized from agro-waste garlic peels by a one-pot facile and easy to scale-up pyrolysis method. Surface morphology and structural features of the nanospheres have been studied by field emission scanning electron microscopy, energy-dispersive spectroscopy, X-ray diffraction, and Raman spectroscopy. Fourier transform infrared spectroscopy (FTIR) and N adsorption desorption experiments were explored to detect surface functionality, surface area, and porosity. Average particle diameter of the synthesized nanospheres was 31 ± 6.3 nm and zeta potential of - 25.2 mV ± 1.75 mV. Nanoscale carbon was mesoporous in nature with type IV isotherms, mean pore diameter of 15.2 nm, and total pore volume of 0.032 cm/g. Minimum inhibitory concentration and minimum bactericidal concentration values of carbon nanospheres against Escherichia coli are 480 ± 0.5 μg/ml and 495 ± 0.5 μg/ml, respectively. Synthesized nanospheres exhibited gram-selective antimicrobial action against Escherichia coli probably linked to membrane deformity due to interaction of nanocarbon with the bacterial membrane. Carbon nanospheres resulting from waste to wealth transformation emerged as promising candidates for antibacterial application. Graphical abstract.
多孔碳纳米球是由农业废弃物大蒜皮通过一锅简便且易于放大的热解方法合成的。通过场发射扫描电子显微镜、能量色散光谱、X 射线衍射和拉曼光谱研究了纳米球的表面形貌和结构特征。傅里叶变换红外光谱（FTIR）和 N 吸附脱附实验用于检测表面官能团、比表面积和孔隙率。合成纳米球的平均粒径为 31 ± 6.3nm，Zeta 电位为-25.2 mV ± 1.75 mV。纳米级碳具有介孔特性，属于 IV 型等温线，平均孔径为 15.2nm，总孔体积为 0.032cm/g。碳纳米球对大肠杆菌的最小抑菌浓度和最小杀菌浓度分别为 480±0.5μg/ml 和 495±0.5μg/ml。合成的纳米球对大肠杆菌表现出革兰氏选择性抗菌作用，这可能与纳米碳与细菌膜相互作用导致膜变形有关。从废物到财富的转化产生的碳纳米球作为抗菌应用的有前途的候选材料脱颖而出。
