Sakkas Petros M, Argirusi Maria, Sourkouni Georgia, Argirusis Christos
National Technical University of Athens, School of Chemical Engineering, Laboratory of Inorganic Materials Technology, I. Polytechniou 9, 15773 Zografou, Athens, Greece.
mat4nrg - Gesellschaft für Materialien und Energieanwendungen mbH, Burgstätterstr. 42, 38678 Clausthal-Zellerfeld, Germany.
Ultrason Sonochem. 2020 Dec;69:105250. doi: 10.1016/j.ultsonch.2020.105250. Epub 2020 Jul 8.
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/cm. 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.
已使用20kHz的超声处理制备了氧化铼纳米颗粒。通过扫描电子显微镜-能谱仪（SEM-EDX）、透射电子显微镜（TEM）、X射线衍射仪（XRD）和拉曼光谱对样品进行了表征。研究了各种实验参数，包括前驱体/底物的量、超声强度和所用溶剂的类型。给出了根据制备参数对所制备纳米颗粒团聚情况的见解。作为超声源，我们使用了Sonics & Materials公司的超声探头（20kHz，净输出功率750W）或Bandelin SONOPULS HD 3200超声发生器（20kHz，净输出功率200W），强度在30至100W/cm之间。已将氧化铼纳米颗粒修饰在用于固体氧化物燃料电池（SOFC）的先进阳极材料（NiO/GDC）上，以制备催化活性更高的阳极粉末。这些实验表明，超声强度和所用溶剂能够影响最终纳米颗粒的尺寸分布和形态。同时，发现前驱体和底物化合物的量之比以及超声强度和持续时间都会影响纳米结构在底物粉末上的修饰负载程度。上述参数影响结果的展示使得对负载和修饰优选位点的影响进行量化成为可能。
