Thoni Lukas, Klemmed Benjamin, Georgi Maximilian, Benad Albrecht, Klosz Stefan, Eychmüller Alexander
Physical Chemistry, TU Dresden Bergstrasse 66b, 01062 Dresden Germany
RSC Adv. 2020 Jan 13;10(4):2277-2282. doi: 10.1039/c9ra09631k. eCollection 2020 Jan 8.
In order to enable future use of aerogels in heterogeneous solid or fluidized bed catalysis a method of production of millimeter sized monolithic Au/AlO aerogel spheres by a continuous flow reactor is developed. Flow velocities and synthesis parameters are optimized to produce aerogel spheres in three different sizes. The resulting aerogel spheres exhibit a porous aluminium oxide aerogel matrix with a large specific surface area of 400 m g on which gold nanoparticles are evenly distributed. The aerogel spheres are compared to xerogels of the same material in contrast to their surface area, pore size distribution, morphology, crystal structure and thermal properties. The presented method allows a broad access to various mixed aerogel systems of oxidic carrier material and noble metal nanoparticles and is therefore relevant for the shaping of different aerogel catalyst systems.
为了使气凝胶在多相固体或流化床催化中得到未来应用，开发了一种通过连续流动反应器生产毫米尺寸整体式金/氧化铝气凝胶球的方法。优化流速和合成参数以生产三种不同尺寸的气凝胶球。所得气凝胶球呈现出具有400 m²/g大比表面积的多孔氧化铝气凝胶基质，金纳米颗粒均匀分布在其上。将气凝胶球与其相同材料的干凝胶在表面积、孔径分布、形态、晶体结构和热性能方面进行了比较。所提出的方法允许广泛获得各种氧化载体材料和贵金属纳米颗粒的混合气凝胶系统，因此对于不同气凝胶催化剂系统的成型具有重要意义。
