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Visible Light Absorption Characteristics of M-Nitrogen (M= Mn, Fe, Co, Ni, Cu) Co-Doped Monodisperse TiO2 Microparticles

Published online by Cambridge University Press:  15 May 2015

John E. Mathis
John E. Mathis*
Affiliation:
Embry-Riddle Aeronautical University, 600 Clyde Morris Blvd., Daytona Beach, FL 32114
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Abstract

There is great interest in improving TiO2’s photocatalytic activity in the visible portion of electromagnetic spectrum. Recent work has shown that co-doping mesoporous TiO2 microparticles with a transition metal and nitrogen, hereby designated as (M,N) TiO2, significantly increases its visible light absorption. However, the hydrothermal method used to produce the microparticles creates a wide distribution in the size of the microparticles, which could affect the absorption properties. Recently, it has become possible to produce monodisperse, mesoporous TiO2 microparticles with engineered sizes using a hybrid sol-gel/hydrothermal technique. Further, it has also been shown that the size of monodisperse TiO2 microparticles affects the the photocatalytic activity.

This study investigated whether using mondodisperse (M,N) TiO2 microparticles would further increase visible-light absorption for (M,N)TiO2. The first-row transition metals chosen for this study - Mn, Fe, Co, Ni, and Cu – have been characterized in the earlier (M,N) TiO2 UV-vis study, which was used as a baseline. The doping levels of the transition metals samples were set at the 2.5 percent level previously shown to be optimum for photocatalytic activity.

Keywords

hydrothermalsol-gelphotoreflectance
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1806: Symposium UU – Titanium Oxides―From Fundamental Understanding to Applications , 2015 , pp. 19 - 24
Copyright
Copyright © Materials Research Society 2015 

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References

REFERENCES

Linsebigler, A. L., Lu, G. and John, J., Yates, T., “Photocatalysis on TiO2 on Surfaces: Principles, Mechanisms, and Selected Results,” Chem. Rev., vol. 95, pp. 735–758, 1995.CrossRefGoogle Scholar
Pascoe, A. R., Chen, D., Huang, F., Duffy, N. W., Caruso, R. A. and Cheng, Y.-B., “Charge Transport in Photoanodes Constructed with Mesoporous TiO2 Beads for Dye-Sensitized Solar Cells,” Journal of Physical Chemistry C, vol. 118, no. 30, pp. 16635–16642, 2014.CrossRefGoogle Scholar
Zhu, W., Qiu, X., Iancu, V., Chen, X. Q., Pan, H., Wang, W., Dimitrijevic, N. M., Rajh, T., , H. M. M. III, Paranthaman, M. P., Stocks, G. M., Weitering, H. H., Gu, B., Eres, G. and Zhang, Z., “Band Gap Narrowing of Titanium Oxide Semiconductors by Noncompensated Anion-Cation Codoping for Enhanced Visible-Light Photoactivity,” Phys. Rev. Lett., vol. 103, p. 226401, 2009.CrossRefGoogle Scholar
Zhang, R., Wang, Q., Liang, J., Li, Q., Dai, J. and Li, W., “Optical properties of N and transition metal R (R=V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) codoped anatase TiO2,” Physica B, vol. 407, pp. 2709–2715, 2012.CrossRefGoogle Scholar
Mathis, J. E., Lieffers, Z. B. J. J., Bridges, C. A., Kidder, M. K. and Paranthaman, M. P., “Increased photocatalytic activity of TiO2 mesoporous microspheres from co-doping with transition metals and nitrogen,” unpublished .Google Scholar
Chen, D., Cao, L., Huang, F., Imperia, P., Cheng, Y.-B. and Caruso, R. A., “Synthesis of Monodisperse Mesoporous Titania Beads with Controllable Diameter, High Surface Areas, and Variable Pore Diameters (14-23 nm),” J. Am. Chem. Soc. 2010, 132, , vol. 132, p. 4438–4444, 2010.CrossRefGoogle Scholar
Chen, Y., Huang, F., Chen, D., Cao, L., Zhang, X. L., Caruso, R. A. and Cheng, Y.-B., “Effect of Mesoporous TiO2 Bead Diameter in Working Electrodes on the Efficiency of Dye-Sensitized Solar Cells,” ChemSusChem vol. 4, p. 1498 – 1503, 2011.CrossRefGoogle Scholar
Mathis, J. E., Bi, Z., Bridges, C. A., Kidder, M. K. and Paranthaman, M. P., “Enhanced visible-light absorption of mesoporous TiO2 by co-doping with transition-metal/nitrogen ions,” MRS Proceedings, vol. dx.doi.org/10.1557/opl.2013.666, p. 1547, 2013.Google Scholar
Wang, X., Cao, L., Chen, D. and Caruso, R. A., “Engineering of Monodisperse Mesoporous Titania Beads for Photocatalytic Applications,” Appl. Mater. Interfaces, vol. 5, pp. 9421–9428, 2013.CrossRefGoogle Scholar