Topochemical synthesis of Ni 2+–Fe 3+ layered double hydroxides with large size

• Published in: Applied clay science Vol. 52; no. 1; pp. 51 - 55
• Main Authors: Li, Yan, Li, Hongjuan, Yang, Mingyang, He, Xuexia, Ni, Ping, Kang, Liping, Liu, Zong-Huai
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2011
• Subjects: Hydroxides; Large size; Layered double hydroxides; Micrometers; Morphology; Reaction time; Regular morphology; Scanning electron microscopy; Topochemical approach; Ureas; X-ray photoelectron spectroscopy; X-rays; Large size; Topochemical approach; Regular morphology; Layered double hydroxides
• ISSN: 0169-1317; 1872-9053
• DOI: 10.1016/j.clay.2011.01.028

Ni 2+–Fe 3+ layered double hydroxide material with large size up to 4 μm and regular morphology was prepared via a topochemical approach by using urea as a hydrolysis agent and mannitol as a stabilizer. α-type Ni 2+–Fe 2+ hydroxide with micrometer size and hexagonal shape was firstly prepared, and the effect of the reaction time, total metal ion concentration and the concentration of urea on the particle size and morphology of the α-type Ni 2+–Fe 2+ hydroxide was investigated. α-type Ni 2+–Fe 2+ hydroxide material was then oxidized by iodine in chloroform, and hydrotalcite-like Ni 2+–Fe 3+ LDH material with large size and regular hexagonal morphology was obtained. The obtained Ni 2+–Fe 3+ LDH material was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and FT-IR spectrum (IR), respectively. [Display omitted] ►Ni 2+–Fe 3+ LDH material with large size and regular hexagonal morphology. ►Ni 2+–Fe 3+ LDH material is prepared by a topochemical approach. ►Urea as a hydrolysis agent and mannitol as stabilizer. ►α-type Ni 2+–Fe 2+ hydroxide material is oxidized by iodine in chloroform.