期刊论文

Hydrolysis and Electrochemical Synthesis of Magnesium, Titanium Alkoxo Complexes

中文

化学通报

0441-3776

2005

1

1-6

本校为其他机构

以金属阳极溶解法在乙醇和乙酰丙酮混合溶液中,控制电流为0.2A,先电解钛片4h,再电解镁条100min,制得纳米MgTiO3前驱体;在温度40℃、pH=8.5的条件下,将含0.25mol/L镁、钛配合物的电解液直接水解形成凝胶.采用红外、拉曼光谱、X射线衍射、电子透射技术等手段对前驱体进行了表征.实验表明,电解温度控制在35~40℃,导电盐Bu4NBr浓度为0.04mol/L较为适合,电流效率为90%以上.前驱体组成为 MgTi(OCH2CH3)(6-y)(acac)y[acac 为乙酰丙酮基],干凝胶粒径为12nm.

The precursor of the nano-MgTiO3 was synthesized by electrochemical dissolution of titanium for 4 hours and then of magnesium for 100 minutes at the current of 0.2A in ethanol and acetyl-acetone solution. At the condition of 40℃ and pH=8.5, the xerogel was prepared by drying and sol-gel of the electrolyte solution of 0.25 mol/L Mg2+ and Ti4+ complex. IR spectrum, Raman, XRD and TEM were used to investigate the structure of the precursor. The result turned out that the temperature should be controlled between 35~40℃ and concentration of conduc...