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Interaction between amino-functionalized inorganic nanoshells and acid-autocatalytic reactions.
Physical Chemistry Chemical Physics : PCCP 2018 May 17
Amino-functionalized inorganic silica nanoshells with a diameter of 511 ± 57 nm are efficiently used as hydrogen ion binders with a base dissociation constant of (1.2 ± 0.1) × 10-4. The hydrogen removal has been shown to produce reaction-diffusion fronts of constant propagation velocity in the autocatalytic chlorite-tetrathionate reaction when it is run in thin planar slices of nanoshell-containing agarose gel to exclude all convection related effects. By controlling the exact amount of amino-functionalized hollow nanospheres in the gel matrix it is possible to finely tune the propagation velocity of the chemical front in the 0.1-10 cm h-1 range. Remarkably, this can be achieved with very low amino-functionalized hollow inorganic nanosphere loadings between 0.1-0.01 (m V-1)%. The front width has also been determined experimentally, which increases by a factor of two with one magnitude decrease in the front velocity.
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