Surface alumina species on modified titanium dioxide: A solid-state (27)Al MAS and 3QMAS NMR investigation of catalyst supports.

@article{Hagaman2010SurfaceAS,
  title={Surface alumina species on modified titanium dioxide: A solid-state (27)Al MAS and 3QMAS NMR investigation of catalyst supports.},
  author={Edward W. Hagaman and Jian Jiao and Banghao Chen and Zhen Ma and Hongfeng Yin and Sheng Dai},
  journal={Solid state nuclear magnetic resonance},
  year={2010},
  volume={37 3-4},
  pages={
          82-90
        }
}
(27)Al MAS and 3QMAS NMR have been used to study Al(2)O(3)/TiO(2) catalyst supports synthesized via excess-solution impregnation and surface sol-gel methods. Temperature and alumina loading level strongly affect chemical states of aluminum oxide species observed. Surface cations, Al(H2O)6(3+), a surface alumina monolayer, and disordered transitional aluminas (multilayers) and alpha-alumina, coexist on the TiO(2) surface. Chemical shift and quadrupole coupling constants are reported for the… CONTINUE READING