Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia.
J Hazard Mater. 2013 Feb 15;246-247:227-33. doi: 10.1016/j.jhazmat.2012.12.026. Epub 2012 Dec 21.
A novel recycling route using acid leaching, reduction and gelatin method was applied to recycle spent Zn-C batteries into more valuable magnetic nano-crystalline ferrites; Mn(1-x)Zn(x)Fe(2)O(4) (with x=0.2-0.8). The cost of this recycling technology has economical advantages, which holds promising industrial application products. Dried gel thermal decomposition process was monitored by simultaneous differential thermal analysis-thermogravimetry-differential scanning calorimetry. Phase composition, morphological and magnetic properties of the as-prepared precursors were characterized using X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared and vibrating sample magnetometer. Single-phase agglomerated cubic ferrites with crystal sizes in the range 21-41 nm were detected. The obtained magnetization values are significantly lower than that of the bulk ferrite and showed a gradual increase with increasing Zn-substitution with an obvious decrease at x=0.6. On the other hand, a reverse trend was exhibited by coercivity. The effect of Zn-substitution on both structural and magnetic properties, paved the way to suggest proper cation distributions for the investigated system.
一种新型的回收路线，采用酸浸、还原和明胶法，将废旧 Zn-C 电池回收成更有价值的磁性纳米晶铁氧体；Mn(1-x)Zn(x)Fe(2)O(4)（x=0.2-0.8）。这种回收技术的成本具有经济优势，具有广阔的工业应用前景。通过同步差热分析-热重分析-差示扫描量热法监测干燥凝胶的热分解过程。采用 X 射线粉末衍射、透射电子显微镜、傅里叶变换红外和振动样品磁强计对制备的前驱体的相组成、形貌和磁性能进行了表征。检测到单分散立方铁氧体的晶体尺寸在 21-41nm 范围内。得到的磁化值明显低于块状铁氧体，并随着 Zn 取代量的增加而逐渐增加，在 x=0.6 时明显下降。另一方面，矫顽力表现出相反的趋势。Zn 取代对结构和磁性能的影响，为研究体系的合适阳离子分布铺平了道路。
