# Surface diffusion control of the photocatalytic oxidation in air/TiO2 heterogeneous reactors

Source: [Surface diffusion control of the photocatalytic oxidation in air/TiO2 heterogeneous reactors](<https://www.sota2.com/research/paper/68fa30ce1e209131ce878cf7>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T18:27:24.175Z

Authors: R. Tsekov, E. Evstatieva, P.G. Smirniotis

Published: 2015-06-11T08:08:51.000Z

## Abstract

The diffusion of superoxide radical anions on the surface of TiO2 catalysts is theoretically considered as an important step in the kinetics of photocatalytic oxidation of toxic pollutants. A detailed analysis is performed to discriminate the effects of rotation, anion and adsorption bonds vibrations on the diffusion coefficient. A resonant dependence of the diffusivity on the lattice parameters of the TiO2 surface is discovered showing that the most rapid diffusion takes place when the lattice parameters are twice larger than the bond length of the superoxide radical anions. Whereas the rotation and vibrations normal to the catalyst surface are important, the anion bond vibrations do not affect the diffusivity due to their low amplitudes as compared to the lattice parameters.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/1506.03581>)

[PDF](<https://arxiv.org/pdf/1506.03581.pdf>)