Perforated cenosphere-supported pH-sensitive spin probes
- Russian Academy of Sciences, Krasnoyarsk (Russian Federation)
Porous supports with an accessible internal volume and a shell providing the diffusive migration of pH-sensitive spin probes were obtained for the first time from hollow aluminosilicate cenospheres isolated from the coal fly ash. Using the methods of scanning electron microscopy and electron spin resonance, the morphology of different porous cenosphere modifications and its influence on the diffusion of spin probes from the internal volume were studied. When supporting aqueous solutions of a radical, the characteristic diffusion time for the mesoporous structure of the support is longer by a factor of 3-5 than that for the macroporous structure. Ferrospinel in a content of 6 wt.% do not virtually affect the diffusion rate of spin probes. A constant rate of radical migration of similar to 1 {mu} mol min{sup -1}, determined by radical solubility in water, is achieved when a radical in the solid aggregate state is supported on the magnetic cenospheres.
- OSTI ID:
- 21150721
- Journal Information:
- Russian Chemical Bulletin, Vol. 57, Issue 3; ISSN 1066-5285
- Country of Publication:
- United States
- Language:
- English
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