Ultrasonics Sonochemistry ( IF 8.4 ) Pub Date : 2020-07-08 , DOI: 10.1016/j.ultsonch.2020.105250 Petros M Sakkas 1 , Maria Argirusi 2 , Georgia Sourkouni 3 , Christos Argirusis 4
Rhenium oxide nanoparticles have been prepared using ultrasonication at 20 kHz. Samples characterization was committed via SEM-EDX, TEM, XRD, and Raman spectroscopy. Various experimental parameters were examined, including precursor/substrate amounts, ultrasonication intensity, and type of solvent used. Insights to the agglomeration of the prepared nanoparticles depending on the preparation parameters are given. As ultrasonic source we used either an ultrasonic probe by Sonics & Materials Inc. (20 kHz, 750 W net output) or a Bandelin SONOPULS HD 3200 ultrasound generator (20 kHz, 200 W net output) at intensities between 30 and 100 W/cm2. The rhenium oxide nanoparticles haven been decorated on state-of-the-art anode materials (NiO/GDC) for solid oxide fuel cells (SOFCs) in order to prepare catalytically more active anode powders. These experiments revealed that ultrasonication intensity and solvents used are able to affect final nanoparticles size distribution and morphology. At the same time, ratio of precursor and substrate compounds amounts as well as ultrasonication intensity and duration were all found to affect the decoration loading extend of nanoformations on substrate powders. The results showing the influence of the above-mentioned parameters allowed for the quantification of the effects on the loading and the preferable sites of the decoration.
中文翻译:
氧化hen纳米颗粒-固体化学燃料电池阳极粉末上的声化学合成和集成。
氧化hen纳米粒子已使用20 kHz的超声处理制备。通过SEM-EDX,TEM,XRD和拉曼光谱对样品进行表征。检查了各种实验参数,包括前体/底物量,超声强度和所用溶剂的类型。给出了根据制备参数对制备的纳米颗粒的团聚的见解。作为超声源,我们使用了Sonics&Materials Inc.的超声探头(20 kHz,净输出功率20 kHz)或Bandelin SONOPULS HD 3200超声发生器(20 kHz,净输出功率200 kHz),强度在30至100 W / cm之间2。氧化rh纳米粒子已经装饰在用于固体氧化物燃料电池(SOFC)的最新阳极材料(NiO / GDC)上,以制备催化活性更高的阳极粉末。这些实验表明,超声强度和所使用的溶剂能够影响最终的纳米颗粒尺寸分布和形态。同时,发现前体和底物化合物的量以及超声强度和持续时间均会影响底物粉末上纳米形态的装饰负荷扩展。显示上述参数的影响的结果允许量化对装饰的负载和优选部位的影响。