摘要
报导了前驱体溶液的pH值对Bi-Ti溶液的水解特性的影响,并探讨了乙醇胺的催化作用机理。研究表明,乙醇胺可调节溶液的pH值,其机理是与HAc反应,并与Bi+离子生成稳定的络合物.前驱体溶液的pH值是决定溶胶、凝胶质量的主要因素.pH值较小时,溶液容易产生沉淀;pH值较大时,溶液中有大量的浑浊物;只有pH值在2.
The transparent sols were prepared from Ti(OC 4H 9) 4 and Bi(NO 3) 3. The catalysis mechanism of ethanolamine on the solution is studied. We found that the ethanolamine can adjust pH value of the solution and also stabilize it by bismuthic complex compound. The pH value of the solution is mainly factor affecting formation of the Sol and Gel. The solution of low pH value is easily formed precipitate; the solution of high pH value is tubid. The solution of pH value between 2.5 and 4 can forms stable sol and homogenous gel.
出处
《湖北大学学报(自然科学版)》
CAS
1996年第4期355-358,共4页
Journal of Hubei University:Natural Science
基金
湖北省教委重点资助项目