Speaker
Description
Titania TiO2 is a promising material candidate for batteries, water splitting and water purification. Its photocatalytical and Li-storage capabilities very much depend on the defect structure in the used titania. Hydrogenation and N-doping have proven to improve this defect structure in such a way that the mentioned properties are drastically improved [1–3].
With the help of nuclear solid state methods like Mössbauer and PAC by using also radioactive isotopes from ISOLDE such defects could be analysed in detail [4–7]. With the support from a BMBF project a new Mössbauer system is generated for ISOLDE with which also the atomic mechanisms responsible for the photocatalytic properties are investigated by Mössbauer spectroscopy, in addition to PAC. First results will be presented.
Acknowledgment: The financially support by the Federal Ministry of Education and Research of Germany (BMBF) under contract 5K16SI1, within joint project 05K2016, is gratefully acknowledged.
[1] Y. Yan, M. Han, A. Konkin, T. Koppe, D. Wang, T. Andreu, G. Chen, U. Vetter, J.R. Morante, P. Schaaf, Slightly hydrogenated TiO2 with enhanced photocatalytic performance, J. Mater. Chem. A. 2 (2014) 12708. doi:10.1039/C4TA02192D.
[2] W. Ren, Y. Yan, L. Zeng, Z. Shi, A. Gong, P. Schaaf, D. Wang, J. Zhao, B. Zou, H. Yu, G. Chen, E.M.B. Brown, A. Wu, A Near Infrared Light Triggered Hydrogenated Black TiO2 for Cancer Photothermal Therapy, Adv. Healthc. Mater. 4 (2015) 1526–1536. doi:10.1002/adhm.201500273.
[3] Y. Yan, D. Wang, P. Schaaf, Fabrication of N-doped TiO2 coatings on nanoporous Si nanopillar arrays through biomimetic layer by layer mineralization, Dalt. Trans. 43 (2014) 8480. doi:10.1039/c3dt53409j.
[4] D. Zyabkin, J. Schell, U. Vetter, H.P. Gunnlaugsson, H. Maseda, P. Schaaf, Defects investigation in black anatase, in: Jt. Meet. DPG EPS Condens. Matter Div., DPG, Berlin, 2018: p. DS 7.8.
[5] D. Zyabkin, J. Schell, U. Vetter, R. Santos, P. Schaaf, Perturbed angular correlation studies of H2 plasma treated rutile, in: Jt. Meet. DPG EPS Condens. Matter Div., DPG, Berlin, 21018: p. DS31.17.
[6] J. Schell, P. Schaaf, U. Vetter, D.C. Lupascu, TDPAC study of Fe-implanted titanium dioxide thin films, AIP Adv. 7 (2017) 095010. doi:10.1063/1.4994247.
[7] J. Schell, P. Schaaf, D.C. Lupascu, Perturbed angular correlations at ISOLDE: A 40 years young technique, AIP Adv. 7 (2017) 105017. doi:10.1063/1.4994249.
