Dispersion Control of Ni Particles in Porous Silica by Solution Exchange of Wet Silica Gel
Dispersion Control of Ni Particles in Porous Silica by Solution Exchange of Wet Silica Gel
复制标题
湿硅胶溶液交换控制镍颗粒在多孔二氧化硅中的分散
DOI：
10.1246/cl.1999.305
复制
发表时间：
1999
影响因子：
1.6
通讯作者：
Takaaki Yoshii
中科院分区：
文献类型：
--
作者：
Ryōji Takahashi;S. Sato;T. Sodesawa;Masayuki Kato;Takaaki Yoshii
通过对溶胶-凝胶法制备的湿硅胶进行溶液交换，可以将具有良好介孔结构的二氧化硅中NiO的粒径控制在3.5 ~ 10 nm，而不考虑NiO含量高达30wt%。在500 °C下减小的样品的Ni表面积可以通过减小NiO粒度来增大，在30重量%负载下得到30 m2 g-1。该催化剂对苯气相加氢反应具有上级活性。
Particle size of NiO in silica with well defined mesoporous structure can be controlled from 3.5 to 10 nm regardless of NiO content up to 30 wt% by solution exchange of wet silica gel derived from sol-gel process. Ni surface area of samples reduced at 500 °C can be enlarged by decreasing the NiO particle size, resulting in 30 m2g−1 at 30 wt% loading. The catalysts showed superior activities for gas-phase hydrogenation of benzene.