Thanikaivelan P, Narayanan T N, Gupta B K, Reddy A L M, Ajayan P M
J Nanosci Nanotechnol. 2015 Jun;15(6):4504-9. doi: 10.1166/jnn.2015.9720.
Collagenous wastes discarded from leather industry were stabilized using superparamagnetic iron oxide nanoparticles and further converted into a magnetic nanocarbon. Stabilization of collagen using iron oxide nanoparticles treatment (25% offer) was confirmed through differential scanning calorimetric analysis and further evidenced through scanning electron microscopic analysis. A simple high temperature treatment of the collagen-iron oxide nanoparticle composite at 850 degrees C for 2 h under Ar atmosphere yielded a bi-functional, magnetic and conducting, nanocarbon. The X-ray diffraction and Raman spectroscopic analysis reveal the partial graphitation and X-ray photoelectron spectroscopic results show the presence of trace-iron containing carbon, naturally doped with nitrogen and oxygen. Transmission electron microscopic analysis show the presence of larger iron oxide nanocrystals embedded in graphitic carbon layers while superconducting quantum interference device based analysis reveals a perfect ferrimagnetic property with saturation magnetization. Thus, we have stabilized the collagen waste fibers using iron oxide nanoparticles and converted them into a bi-functional nanocarbon, which has potential for various applications including energy, leather making and environmental remediation.
皮革工业废弃的胶原质废料通过超顺磁性氧化铁纳米颗粒进行稳定化处理，并进一步转化为磁性纳米碳。通过差示扫描量热分析证实了使用氧化铁纳米颗粒处理（优惠25%）对胶原质的稳定化作用，并通过扫描电子显微镜分析进一步得到证明。在氩气气氛下，将胶原质-氧化铁纳米颗粒复合材料在850摄氏度简单高温处理2小时，得到了一种具有双功能、磁性且导电的纳米碳。X射线衍射和拉曼光谱分析揭示了部分石墨化，X射线光电子能谱结果表明存在含痕量铁的碳，天然掺杂有氮和氧。透射电子显微镜分析显示在石墨碳层中存在嵌入的较大氧化铁纳米晶体，而基于超导量子干涉装置的分析揭示了具有饱和磁化强度的完美亚铁磁性。因此，我们使用氧化铁纳米颗粒稳定了胶原质废料纤维，并将其转化为一种双功能纳米碳，其在包括能源、皮革制造和环境修复等各种应用中具有潜力。
