Kinetic and thermodynamic investigation of rhodamine B adsorption at solid/solvent interfaces by use of evanescent-wave cavity ring-down spectroscopy.

@article{Chen2010KineticAT,
  title={Kinetic and thermodynamic investigation of rhodamine B adsorption at solid/solvent interfaces by use of evanescent-wave cavity ring-down spectroscopy.},
  author={Ming-Shiang Chen and Hsiu-Fang Fan and King Chuen Lin},
  journal={Analytical chemistry},
  year={2010},
  volume={82 3},
  pages={868-77}
}
Evanescent-wave cavity ring-down spectroscopy is applied to investigate the adsorption behavior of rhodamine B at three different interfaces. The adsorption equilibrium constant (K(ads)) and adsorption free energy of rhodamine B at the silica/methanol interface are determined to be (1.5 +/- 0.2) x 10(4) M(-1) and -23.8 +/- 0.4 kJ/mol by use of a Langmuir isotherm model. A Langmuir-based kinetic model is also developed to determine the corresponding adsorption and desorption rate constants of (1… CONTINUE READING