摘要
以六水合硝酸钴和酞酸丁酯为主要原料,乙二胺四乙酸(EDTA)为络合剂,用溶胶-凝胶法制备出CoTiO3纳米晶。用差热-失重热分析(TG-DSC)、X-射线衍射(XRD)、透射电子显微镜(TEM)等测试手段,对凝胶前驱体及产物进行了表征。研究了煅烧温度、前驱体pH值对产物组成和结构形貌的影响,并用Kissinger法计算CoTiO3纳米晶的表观活化能。结果表明:溶胶pH值为2.0～4.0,凝胶经700℃煅烧2 h,获得均匀分布的CoTiO3纳米晶、平均粒径约50 nm。CoTiO3纳米晶的表观活化能为80.43 kJ/mol。
CoTiO3 nanocrystal were prepared by sol-gel process using Co （NO3 ）2 · 6H2O and Ti （OC4H9）4 as raw materials and C10H16N2O8 （EDTA） as chelating agent. The precursor and final products were characterized by thermogravimetric-differential thermal analysis （TG-DSC）, X-ray diffraction （XRD） and transmission electron microscope （TEM）. The effects of calcining temperature and precursor pH value on preparation were detailed investigated. In addition, the synthesized activation energy of CoTiO3 nanocrystal was calculated by Kissinger method. The results showed that uniform CoTiO3 nanocrystal with average particle size of 50 nm could be obtained after calcining at 700℃ for 2 h, and the appropriate sol pH value is 2.0-4.0. The apparent activation energy of CoTiO3 nanocrystal prepared by sol-gel method is 80.43 kJ/mol.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2013年第9期1826-1830,共5页
Journal of Synthetic Crystals
基金
陕西省教育厅自然基金项目(2013JK0935)
陕西科技大学博士科研启动基金(BJ12-11)
陕西科技大学校级项目(ZX11-12)
