Hydrothermal synthesis of Mn–Zn ferrites from spent alkaline Zn

Xiao, L., Zhou, T., & Meng, J. (2009). Hydrothermal synthesis of Mn–Zn ferrites from spent alkaline Zn–Mn batteries. Particuology, 7(6), 491–495. https://doi.org/10.1016/j.partic.2009.04.012

Hydrothermal synthesis of Mn–Zn ferrites from spent alkaline Zn–Mn batteries

Lu Xiao, Tao Zhou^*, Jia Meng

Institute of Chemical & Chemical Engineering, Central South University, Changsha 410083, Hunan, China

10.1016/j.partic.2009.04.012

Volume 7, Issue 6, December 2009, Pages 491-495

Received 10 February 2009, Revised 31 March 2009, Accepted 6 April 2009, Available online 21 October 2009.

E-mail: zhoutao@mail.csu.edu.cn

Highlights

Abstract

Nanocrystalline Mn–Zn ferrites (Mn_0.6Zn_0.4Fe₂O₄) with particle size of 12 nm were synthesized hydrothermally using spent alkaline Zn–Mn batteries, and accompanied by a study of the influencing factors. The nanocrystals were examined by powder X-ray diffraction (XRD) for crystalline phase identification, and scanning electron microscopy (SEM) for grain morphology. The relationship between concentration of Fe(II), Mn(II), and Zn(II) and pH value was obtained through thermodynamic analysis of the Fe(II)–Mn(II)–Zn(II)–NaOH–H₂O system. The results showed that all ions were precipitated completely at a pH value of 10–11. The optimal preparation conditions are: co-precipitation pH of 10.5, temperature of 200 °C and time of 9 h.

Graphical abstract

Keywords

Spent alkaline batteries; Ferrites; Hydrothermal method; Preparation

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