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Citation: ZHENG Chong-Hui, WANG Jun, LIU Yan-Feng, SUN Wei-Yan, ZHONG Chong-Na, YOU Jia, JING Xiao-Yan, ZHANG Mi-Lin, DUAN Xue. Synthesis and Characterization of Magnetic Anion-pillared Ni-Al Hydrotalcites[J]. Chinese Journal of Applied Chemistry, ;2007, 24(8): 883-887. shu

Synthesis and Characterization of Magnetic Anion-pillared Ni-Al Hydrotalcites

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a Materials Science and Chemistry Engineering College, Harbin Engineering University, Harbin 150001;
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b Key Laboratory of Science and Technology of Controllable Reactions, Ministry of Education, Beijing University of Chemical Technology, Beijing

Corresponding author: ZHANG Mi-Lin,
Received Date: 3 September 2006
Available Online: 25 December 2006
Fund Project: 国家自然科学基金资助项目(20076003) (20076003)黑龙江省科技攻关资助项目(G202A423) (G202A423)哈尔滨市科学研究基金资助(2004AFQXJ038) (2004AFQXJ038)

Magnetic Ni-Al hydrotalcites were synthesized with different amounts of magnetic substrate and Ni-Al hydrotalcite-like compounds.The influences of the amount of magnetic substrate,calcination temperature on the structure were studied.The obtained samples were characterized by SEM,XRD,FT-IR,DSC-TG,and VSM.The results indicate that the introduction of magnetic substrate endows Ni-Al hydrotalcite a super-magnetism feature.The magnetism depends on the amount of the magnetic substrate.The saturation magnetization of magnetic Ni-Al hydrotalcite is enhanced with the increasing of magnetic substrate.X-ray diffraction patterns show the layered structures of magnetic Ni-Al hydrotalcites are not affected by introducing a certain amount of magnetic substrate and the diffraction peaks decrease with increasing the amount of magnetic substrate.When the n(Ni²⁺)/n(Fe²⁺) molar ratio reaches 20,XRD diffraction peaks of the Fe₃O₄ phase begin to emerge.When the temperature is increased to 1 073 K,the spinel phase is observed.The DSC-TG curves show two endothermal peaks are not affected by introducing magnetic substrate,and is consistent with XRD result.
- magnetism,
- layered structure,
- hydrotalcite,
- calcination temperature
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