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tczyh

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[求助] sol-gel法制备TiO2

本人研一,最近在尝试sol-gel法制备二氧化钛。有点疑惑,希望大家可以给我点建议。
我的方案是:钛酸四丁酯:乙醇(事先溶解进去一定比例的AgNO3):硝酸=10:30:1.5 (ml),磁力搅拌得到淡黄色溶液。我先在载玻片上镀膜,然后陈化2,3天后,将膜刮下来收集,在600度、空气环境下煅烧。
煅烧产物:白色颗粒(银含量少的),黑色(银含量多的)。
想请教:这是正常现象 还是有什么原因呢?
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