Template effect on structure and morphology of Ni(OH)₂ powders prepared by hydro-chemical method

Abstract

The template effect controlling the structure and morphology of ultrafine particles was described. Ni(OH)₂ powders were prepared by NH₃ coordination-precipitation method. The effects of SO₄²⁻, NO₃⁻, Cl⁻, NH₃, pH value on Ni(OH)₂ structure and morphology were investigated experimentally, explained with the theoretical model that the growth units were the polyhedral structure of coordination anions. The results showed that the structure and morphology of Ni(OH)₂ were effectively controlled by the growth units, the dimensions and the linking patterns of the growth units vary with the changes of physical and chemical conditions in the aqueous solution.

Keywords

Ni(OH)₂ / structural control / polyhedral structure of coordination anions / growth units

References

[1] LiQi-hou, XiaoSong-wen, LiuZhi-hong. Progress of research on structure and shape control of powder prepared by hydrometallurgy method [J]. China Powder Science and Technology, 1999, 5(2): 21-21(in Chinese)

[2] ZhangDuo-mo, LiQi-hou, ChenSong. Biological mineralization mechanism and morphology of ultrafines [J]. Powder Metallurgy Material Science and Engineering, 1999, 4(1): 29-29(in Chinese)

[3] ZhouGen-tao, LiuShuang-huai. A study on preparation of ultrafine powders of Ni(OH)₂ and NiO with different shapes by precipitation transformation method [J]. Journal of Inorganic Chemistry, 1997, 13(1): 43-43(in Chinese)

[4] FANG Xiao, YANG Yun-xia. Study on Ni(OH)₂ with high density [J]. Inorganic Salt Industry (in Chinese), 1995(4): 6

[5] HU Zhi-guo, ZHANG Xiu-ying. A new method preparing NiO ultrafine powders [J]. Chemistry Acta (in Chinese), 1999(3): 49

[6] StephenMann. Biomineralization: The hard part of bioinorganic chemistry [J]. J Chem Soc Dalton Trans, 1993, 27: 1-1

[7] MannStephen. Molecular tectonics in biomineralization and biomimetic materials chemistry [J]. Nature, 1993, 365: 499-499

[8] YE Xiang-yang, GUO Qi-zhen. New progress of template synthesis [J]. Chemistry Acta (in Chinese), 1996(2): 1

[9] YOU Xiao-zhen, LI Tun. Supramolecule chemistry and molecule part—A prospect of ligand chemistry [J]. Chemistry Acta (in Chinese), 1993, (2): 24

[10] QI Li-min, MA Ji-min. Inorganic materials with composited shapes prepared by supramolecule template [J]. Chemistry Acta (in Chinese), 1997(5): 1

[11] ZhongWei-zuoArtificial crystal (in Chinese) [M], 1994, Beijing, Science Press: 515-572

[12] YaoLian-zengBasis of crystal growth (in Chinese) [M], 1995, Hefei, Chinese Science and Technology University Press: 258-338

[13] ZhongZhu-qian, MeiGuang-guiHydrometallurgical process (in Chinese) [M], 1988, Changsha, Central South University of Technology Press: 121-149

[14] ZengQing-xue. Preparation of high-density, high activity and spherical nickel hydroxide [J]. Chinese Journal of Power Sources, 1997, 21(2): 65-65(in Chinese)