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以RuCl3、SnCl2、SnCl4为源物质,柠檬酸为络合剂,无水乙醇为溶剂制备了纳米级20%RuO2-80%SnO2。采用XRD、TEM和比表面(BET)等测试技术研究了产物的组织结构。结果表明:粉体为分散性良好、尺寸分布均匀、具有优良热稳定性的金红石相。以SnCl2为反应物,完全形成尺寸约为10nm的(Ru,Sn)O2固溶体。以SnCl4为反应物,形成SnO2和RuO2混合物。钌出现的温度比单一以RuCl3为源物质时出现的温度高,超过钛阳极的常规制备温度450~550℃。SnO2可以有效控制Ru的产生并阻止RuO2的择优生长取向。400℃加热保温1h的样品,其表面积比600℃加热的比表面积大,前驱体为SnCl2制备的粉末的比表面积具有比前驱体为SnCl4时的大。
Nanoscale 20% RuO2-80% SnO2 was prepared by using RuCl3, SnCl2 and SnCl4 as the source materials and citric acid as the complexing agent and absolute ethanol as the solvent. The structure of the product was investigated by XRD, TEM and BET. The results show that the powders are rutile with good dispersibility, uniform size distribution and excellent thermal stability. Using SnCl2 as the reactant, a (Ru, Sn) O2 solid solution with a size of about 10 nm was completely formed. SnCl4 as a reactant to form a mixture of SnO2 and RuO2. The temperature at which ruthenium occurs is higher than the temperature at which RuCl3 alone is the source material, exceeding the conventional preparation temperature of the titanium anode by 450-550 ° C. SnO2 can effectively control the generation of Ru and prevent the preferential growth orientation of RuO2. The sample heated at 400 ℃ for 1 h had a larger specific surface area than that heated at 600 ℃. The specific surface area of the powder prepared by SnCl2 precursor was larger than that of SnCl4 precursor.