Investigations on gold nanoparticles in mesoporous and microporous materials

In these materials, the size of gold nanoparticles varied in the range of ∼2-6 nm. The dispersion and size of gold nanoparticles are different in the materials with MCM-41, ZSM-5 and LSX structures. The interaction of NO/CO with the nano gold materials under different reaction temperatures and NO/CO pressures have been studied using in-FTIR technique. In situ high temperature XRD measurements were conducted over the materials in order to investigate the fate of gold nanoparticles and phase transformations at high temperatures (303-1873 K) within the mesoporous and microporous matrices.