Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-28T15:25:50.440Z Has data issue: false hasContentIssue false
  • English
  • Français

Detailed Characterization of Surface Ln-Doped Anatase TiO2 Nanoparticles by Hydrothermal Treatment for Photocatalysis and Gas Sensing Applications

Published online by Cambridge University Press:  01 June 2015

Rezwanur Rahman ,
Sean T. Anderson ,
Sonal Dey  and
Robert A. Mayanovic
Rezwanur Rahman
Affiliation:
Department of Physics, Astronomy, and Materials Science, Missouri State University, 901 South National Avenue, Springfield, MO 65897
Sean T. Anderson
Affiliation:
Department of Physics, Astronomy, and Materials Science, Missouri State University, 901 South National Avenue, Springfield, MO 65897
Sonal Dey
Affiliation:
Department of Physics, Astronomy, and Materials Science, Missouri State University, 901 South National Avenue, Springfield, MO 65897
Robert A. Mayanovic
Affiliation:
Department of Physics, Astronomy, and Materials Science, Missouri State University, 901 South National Avenue, Springfield, MO 65897
Get access

Abstract

Nanostructured anatase TiO2 is a promising material for gas sensing and photocatalysis. In order to modify its catalytic properties, the lanthanide (Ln) ions Eu3+, Gd3+, Nd3+ and Yb3+ were precipitated on the surface of TiO2 nanoparticles (NPs) by hydrothermal treatment. Results from Raman spectroscopy and X-ray diffraction (XRD) measurements show that the anatase structure of the TiO2 nanoparticles was preserved after hydrothermal treatment. SEM and TEM show a heterogeneous distribution in size and a nanocrystallite morphology of the TiO2 NPs (∼ 14 nm in size) and EDX confirmed the presence of the Ln-ion surface doping after hydrothermal treatment. An increase in photoluminescence (PL) was observed for the Ln-surface-doped TiO2 NPs when measurements were made in forming gas (5% H2 + 95% Ar) at 520 °C. In contrast, the PL measurements made at room temperature did not show any noticeable difference in forming gas or in ambient air. Our temperature-dependent PL results obtained in different gas environments are consistent with modification of oxygen-vacancies and hole-defects due to a combination of hydrothermal treatment and surface Ln-doping.

Keywords

hydrothermallanthanideRaman spectroscopy
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1806: Symposium UU – Titanium Oxides―From Fundamental Understanding to Applications , 2015 , pp. 25 - 30
Copyright
Copyright © Materials Research Society 2015 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Choi, W., Catal. Surveys Asia 10, 16–28 (2006).CrossRefGoogle Scholar
Ni, M., Leung, M.K.H., Leung, D.Y.C., and Sumathy, K., Renew. Sust. Energy Rev. 11, 401–425 (2007).CrossRefGoogle Scholar
Liu, H., Yu, L., Chen, W., and Li, Y., J. Nanomater. 2012, 235879 (2012).Google Scholar
Zhao, Z. and Liu, Q., J. Phys. D: Appl. Phys. 41, 085417 (2008).Google Scholar
Shi, J., Chen, J., Feng, Z., Chen, T., Lian, Y., Wang, X., and Li, C., J. Phys. Chem. 111, 693–699 (2007).Google Scholar
McCart, P.A., Farris, L., Mayanovic, R.A., Yan, H., Mater. Res. Soc. Symp. Proc. 1582, 10.1557 (2013).CrossRefGoogle Scholar
Zhang, H., Chen, G., Behnemann, D., J. Mater. Chem. 19, 5089−5121 (2009).CrossRefGoogle Scholar
Wang, D., Zhao, J., Chen, B., Zhu, C, J. Phys.: Condens. Matter 20, 085212 (2008).Google Scholar
Mercado, C., Seeley, Z., Bandyopadhyay, A., Bose, S., McHale, J., Appl. Mater. Interfaces 3, 2281–2288 (2011).CrossRefGoogle Scholar
Albuquerque, A., Bruix, A., dos Santos, I. M. G., Sambrano, J. R., Illas, F., J. Phys. Chem.C 118, 9677−9689 (2014).CrossRefGoogle Scholar