【摘要】 分别以 Sn Cl2 · 2 H2 O和 Sn Cl4 · 5H2 O为锡源 ,采用胶溶晶核法 ,经沉淀和胶溶过程 ,在液相中一步合成了金红石型 Ti O2 .详细考察了各种胶溶条件对产物结构的影响 ,并通过两种锡源实验结果的比较对异相晶核法中两种锡源的成晶机理进行了分析 .所合成的金红石型 Ti O2 晶粒度为 2 0～ 50 nm,两种方法获得完全金红石型 Ti O2 所需引入 Sn O2 的最低物质的量的分数分别为 1 0 %和 8% .更多还原

【Abstract】 Rutile tatania powders were synthesized in aqueous solutions, avoiding the appearance of TiO 2 in anatase form, by heterogeneous nucleation methods with SnCl 2·2H 2O(method A) and SnCl 4·5H 2O(method B) as the raw materials respectively. The effects of nuclei and peptizing conditions on the structures of products were investigated. The mechanisms of nucleation were studied by comparing the results of the two different raw materials. The content of SnO 2 in the samples with a full rutile structure was 10% and 8%(molar fraction) for the two methods respectively.更多还原