Nickel microspheres prepared by hydrothermal process assisted with polymer template

作者：Bing Xi Wang^*; Hang Lin; Zheng hu Zuo

来源：Acta Chimica Sinica, 2007, 65(21): 2428-2432.

• nickel microsphere
• block polymer
• hydrothermal process

Nickel microspheres have been prepared by a hydrothermal process with a template of triblock copolymer HO(CH2CH2O)(20)(CH2CH(CH3)O)(70)(CH2CH2O)(20)H (P123) and a reductant of sodium hypophosphite. The prepared products were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and vibrating sample magnetometer (VSM). Results show that the nickel microspheres are composed of nickel nanocrystzds, and at least a part of them possess hollow structures. The size of the microspheres decreases with an increase in pH value of the precursor solution, and their aggregation degree to form chainlike assemblies rises with the elevation of temperature. Two kinds of microspheres prepared at 120 and 220 degrees C have diameter ranges of 1.5 similar to 4.5 and 0.8 similar to 4.5 mu m, and consist of nanocrystals with average sizes of 16.0 and 14.2 nm, and their coercivities are 91.5 and 66.1 Oe, respectively.

• 出版日期2007-11-14
• 单位福州大学