title: Mn-Zn nano-crystalline ferrites synthesized from spent Zn-C batteries using novel gelatin method.
abstract: 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.
authors: Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia. mgabalabdonada@yahoo.com
authors: M A
authors: MA
authors: Gabal
authors: R S
authors: RS
authors: Al-Luhaibi
authors: Y M
authors: YM
authors: Al Angari
mesh_terms: D002152:Calorimetry, Differential Scanning; D004055:Differential Thermal Analysis; D059029:Electronic Waste; D005290:Ferric Compounds / Q000737:chemistry*; D005780:Gelatin / Q000737:chemistry*; D060328:Magnetic Phenomena; D008345:Manganese / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry*; D059027:Recycling / Q000379:methods*; D013818:Thermogravimetry; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D008345:Manganese; D005780:Gelatin; D015032:Zinc