摘要
以SiO2为载体在离子液体环境下合成了Ag/SiO2和复合纳米粒子Ag-Cu/SiO2催化剂,讨论了还原剂水合肼的浓度、离子液体用量对纳米粒子生成的影响,通过SEM、XRD、N2吸附-解析对其进行了表征。结果表明,制备时加入离子液体后纳米颗粒较小,形状较为均一,当水合肼浓度为0.1mol/L时,易于生成纳米粒子尺寸较小的纳米银。将Ag/SiO2与Ag-Cu/SiO2纳米粒子催化性能进行了比较发现,在甲烷氧化的性能测试中,Ag/SiO2优于Ag-Cu/SiO2的催化性。
Ag/SiO2 and composite nanoparticles Ag-Cu/SiO2 catalyst were synthesized in a carrier of SiO2 and the ionic liquid environment. Effect of ionic liquid dosage and hydrazine hydrate concentration on the nanoparticles generating was carried out by SEM, XRD and N2 adsorption-analytical characterization. The results showed that the nanoparticles were smaller, had more uniform shape after adding to ionic liquid. It was easy to produce smaller nano-silver when the concentration of hydrazine hydrate was 0.1 mol/L. Comparison of Ag/SiO2 with Ag-Cu/SiO2 in catalytic properties indicated that the catalytic activity of Ag/SiO2 was higher than that of Ag-Cu/SiO2 in the methane oxidation performance tests.
出处
《大连工业大学学报》
CAS
北大核心
2013年第1期33-35,共3页
Journal of Dalian Polytechnic University
基金
国家重点基础研究发展计划(973)项目(2005CB221406)
辽宁省科学技术基金项目(20021053)
关键词
离子液体
纳米银
纳米银铜
催化
ionic liquids
nano-silver
nano silver and copper
catalytic
作者简介
于长顺（1961-），男，副教授．
