Insights into the intracrystalline diffusion limitations of TS-1 in catalytic cyclohexanone ammoximation: Effects of the Si-OH groups inside the zeotype micropores

The catalytic activity of titanium silicalite-1 (TS-1) in cyclohexanone ammoximation is controlled by the intracrystalline diffusion limitations due to the hydrogen-bonding interactions between the internal Si-OH groups in TS-1 and H2O2, NH3, and NH2OH, while these Si-OH groups can be effectively annealed by an ultraviolet-assisted heat post-treatment, resulting in enhanced activity.