Highly Sensitive Pure and Pd-Doped LaFeO3 Nanocrystalline Perovskite-Based Sensor Prepared by High Energy Ball Milling
Highly Sensitive Pure and Pd-Doped LaFeO3 Nanocrystalline Perovskite-Based Sensor Prepared by High Energy Ball Milling
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DOI：
10.4028/www.scientific.net/amr.409.486
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发表时间：
2011-11
期刊：
影响因子：
--
通讯作者：
Mohammad Ghasdi;H. Alamdari
中科院分区：
文献类型：
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作者：
Mohammad Ghasdi;H. Alamdari
采用高能球磨法制备了纯的纳米结构LaFeO 3，其晶粒尺寸约为13 nm，比表面积为48 m2/g。将0.4、2和5重量%的Pd浸渍在合成的LaFeO 3上。通过TPD-O2、TPD-CO和TPR-H2研究了Pd负载量对钙钛矿氧化物性能的影响，并研究了掺杂和纯配方的CO气敏性能。这些结果表明，2wt%Pd具有最佳响应比，其在140°C下相对于空气中的IOOppm CO具有1200%的最大响应比。
Pure nanostructured LaFeO3 with crystallite size of around 13 nm and specific surface area of 48 m2/g were prepared using high energy ball milling. 0.4, 2 and 5 wt% of Pd was impregnated on synthesized LaFeO3. TPD-O2, TPD-CO and TPR-H2 were performed to find the effect of Pd loading on perovskite oxide properties.CO gas sensing properties of doped and pure formulation were investigated. These results showed that 2 wt% Pd had optimum response ratio which had a maximum response ratio of 1200% with respect to 100 ppm CO in air at 140°C.