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neutrinos

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[求助] 求助钛酸锂纳米颗粒的制备方法

各位大佬,最近想用溶胶凝胶法制备一批钛酸锂纳米颗粒,参照文献中的方法以硝酸锂为锂源,钛酸四丁酯为钛源,钛酸锂溶解在无水乙醇中(体积比1:5)为A液,硝酸锂溶解在溶解有柠檬酸的去离子水中为B液,Li : Ti 摩尔比约为0.84 。文献报道在85℃水浴中搅拌4小时即形成黄色胶体。但是我得到的始终是黄色溶液(有微量沉淀和少量漂浮的胶状物),老化一夜+干燥12h也未得到理想的粉末。在尝试用无水乙醇清洗底部沉淀时,乙醇与该溶液接触迅速形成白色胶状物。请问这种情况是钛酸四丁酯加入过量了么?还是加入的比例不对?有哪位帮忙解答一下,不胜感激!(EDS分析表明没有锂元素分布)
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