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材料工程  2008 

SnCl2,SnCl4为前驱体的柠檬酸凝胶法制备的20%RuO2-80%SnO2组织研究

Keywords: 柠檬酸盐凝胶法,纳米材料,组织结构,SnO2,RuO2

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Abstract:

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。

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