Surface modification with phosphoric acid of SiO2/Nb2O5 prepared by the sol-gel method: structural-textural and acid sites studies and an ion exchange model.

@article{Francisco2004SurfaceMW,
  title={Surface modification with phosphoric acid of SiO2/Nb2O5 prepared by the sol-gel method: structural-textural and acid sites studies and an ion exchange model.},
  author={Maria Suzana P. Francisco and William S. Cardoso and Yoshitaka Gushikem and Richard Landers and Yuriy V. Kholin},
  journal={Langmuir : the ACS journal of surfaces and colloids},
  year={2004},
  volume={20 20},
  pages={8707-14}
}
In this work, the structural and textural properties of the SiO2/Nb2O5 system prepared by the sol-gel method and then modified by phosphoric acid were studied. The different materials were prepared, with three different mol % Nb2O5 (2.5, 5.0, and 7.5 mol %), and calcined in the temperature range of 423-1273 K. BET specific surface area determinations… CONTINUE READING