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XPS data from The effect of Mn doping and Ti3+ defects at TiO2 surfaces in NO and SO2 gas capture investigated using near-ambient pressure X-ray photoelectron spectroscopy

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posted on 2023-12-20, 14:05 authored by Andrew ThomasAndrew Thomas

Some oxidising air pollutants, such as NOx and SO2 are thought to be linked to premature skin aging. Here we study a model system of titanium dioxide (TiO2) single crystals with and without Mn doping, in order to understand the reaction mechanism and amount of adsorbed gas. We also investigate the effect of O-vacancies formed on the TiO2 surface. We find that Mn leads to an increased uptake of both gases and conversion to sulphite and sulphate. We also find increased surface O-vacancies results in a larger Mn uptake. We then compare these data to reaction of the pollutant gases with two commercial TiO2 powders used in cosmetic products with and without Mn, and although the products are subtly different the uptake is still increased for the Mn-doped sample. The data here are X-ray photoelectron spectra recorded from the different surface treatents and gas exposures.

Funding

EPSRC Impact Acceleration Fund IAA

Sir Henry Royce Institute - recurrent grant

Engineering and Physical Sciences Research Council

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EP/P025021/1

Sir Henry Royce Institute - Manchester Build

Engineering and Physical Sciences Research Council

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