Ag/SiO_2和Ag-Cu/SiO_2纳米催化剂的制备与表征  

Preparation and characterization of Ag/SiO_2 and Ag-Cu/SiO_2 nano-catalysts

作　　者：于长顺[1] 张金峰[2] 刘小新[1] 王少君[1] 陈丽凤[1] 安庆大[1] 

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034 [2]大连工业大学纺织与材料工程学院,辽宁大连116034

出　　处：《大连工业大学学报》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)

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.

关 键 词：离子液体 纳米银 纳米银铜 催化 

分 类 号：TQ426.64[化学工程]