Hostname: page-component-78c5997874-g7gxr Total loading time: 0 Render date: 2024-11-11T07:04:16.415Z Has data issue: false hasContentIssue false
  • English
  • Français

Active Nanostructures at Interfaces for Photocatalytic Reactors and Low-power Consumption Sensors

Published online by Cambridge University Press:  01 February 2011

James L Gole ,
Serdar Ozdemir ,
Sharka M Prokes  and
David M Dixon
James L Gole
Affiliation:
james.gole@physics.gatech.edu, Georgia Institute of Technology, School of Physics, Atlanta, Georgia, United States
Serdar Ozdemir
Affiliation:
serdaro@gatech.edu, Georgia Institute of Technology, School of Physics, Atlanta, Georgia, United States
Sharka M Prokes
Affiliation:
sharka.prokes@nrl.navy.mil, Naval Research Laboratory, Washington, District of Columbia, United States
David M Dixon
Affiliation:
dadixon@as.ua.edu, university of Alabama, Chemistry, Tuscaloosa, Alabama, United States
Get access

Abstract

Active nanostructures which provide unique transformations are being introduced to phase matched porous silicon (PS) nano/micropores to form a platform for low power consumption highly selective sensors and microreactors. TiO2-xNx photocatalysts have been formed in seconds at room temperature at the nanoscale via the direct nitration of anatase TiO2 nanocolloids. Tunability throughout the visible depends upon the degree of agglomeration and the ability to seed these nanoparticles with metal ions. Co metal ion seeding leads to the efficient room temperature phase transformation, of anatase to rutile TiO2, where normally much higher temperatures are required. Seeding of a properly nitridated TiO2 nanocolloid with transition metal ions (Co, Ni) allows for the enhancement of the infrared spectra of the TiO2-xNx nitridated titania surface in excess of 10-fold, providing a means to analyze for minor contaminants and intermediates. Evidence for nitrogen fixation is found in Fe treated systems. The TiO2-xNx systems act as visible light absorbing photocatalyts. These photocatalysts and additional nanostructured metal oxides can be placed on the surface of PS-based sensor and microreactor configurations to greatly improve the interface response.

Keywords

nanostructurecatalyticsensor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1257: Symposium O – Multifunctional Nanoparticle Systems-Coupled Behavior and Applications , 2010 , 1257-O09-04
Copyright
Copyright © Materials Research Society 2010

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

1 Ozdemir, S. and Gole, J.L., Current Opinion in Solid State and Materials Science, 11, 92–100 (2007).Google Scholar
2 Lewis, S.E., DeBoer, J.R., Gole, J.L., Hesketh, P.J., Sens. Actuators B, 110, 54–65 (2005).Google Scholar
3 Gole, J.L., Lewis, S.E., SPIE-Proceedings, 2005, 5732 : 573–583.Google Scholar
4 Campbell, J., Corno, J.A., Larsen, N., Gole, J.L., J.Electrochem. Soc. 155, D128–132 (2008).Google Scholar
5 Kumar, S., Fedorov, A.G., and Gole, J.L., Applied Catalysis B:Env 57(2), 93 (2005).Google Scholar
6 Gole, J.L., Stout, J., Burda, C., Lou, Y., Chen, X., J. Phys. Chem. B 108, 1230 (2004).Google Scholar
7 Chen, X., Lou, Y., Samia, A.C.S., Burda, C., and Gole, J.L., Adv. Func. Mater 15, 41 (2005).Google Scholar
8 Prokes, S.M., Gole, J.L., Chen, X., Burda, C. and Carlos, W.E., Adv Func. Mater 15, 161, 2005.Google Scholar
9 Burda, C., Lou, Y., Chen, X., Samia, A.C.S., Stout, J., Gole, J.L., Nano Lett, 3, 1049 (2003).Google Scholar
10 Gole, J.L., Prokes, S.M., and White, M.G., Appl. Surface Sci. 255, 718 (2008).Google Scholar
11 Gole, J.L., Prokes, S.M., and Glembocki, O.J., J. Phys. Chem. C, 112, 1782 (2008). Most recently, J. Choi, H. Park,and M.R. Hoffmann, J. Phys. Chem. C, 114,783-792 (2010) have observed similar transition metal based transformations albeit at considerably elevated temperatures.Google Scholar
12 Gyorgy, E., Pino, A. Peres del, Serra, P., Moreza, J.L., Appl. Surf. Science, 186, 130, 2002.Google Scholar
13“Study of Concentration-dependent Cobalt Ion Doping of TiO2 and TiO2-xNx at the Nanoscale”, J.L. Gole, S.M. Prokes, X. Qiu, C. Burda, J. Wang, and O.J. Glemboki, Nanoscale, DOI: 10.1039/c0nr00125b.Google Scholar
14 Windisch, C.F. Jr., Exarhos, G.J., Owings, R.R., J. Appl. Phys. 95, 5435 (2004).Google Scholar
15 Brevet, A., Fabreguette, F., Imhoff, L., Lucas, McM de, Heintz, O., Saviot, L., Sacilotti, M., Bourgeois, S., Surfaces and Coatings Technol. 36, 151 (2002).Google Scholar
16 Escudero, M.J., Rodrigo, T., Mendoza, L., Cassir, M., Daza, L., J. Power Sources, 140, 81 (2004).Google Scholar
17 Gole, J.L., Dixon, D.A., Clemens Burda, and Jonathan Brauer to be published.Google Scholar
18 Gole, J.L., Prokes, S.M., White, M.G., Wang, T.-H., R, Craciun, and Dixon, D.A., J. Phys. Chem. C, 111, 16871–7 (2007).Google Scholar
19 Ozdemir, S., Gole, J.L. “A phosphine detection matrix using nanostructure modified porous silicon gas sensors”, submitted to Sens. and Actuators B.Google Scholar
20 Gole, J.L. and Ozdemir, S., “Nanostructure directed physisorption and chemisorption at semiconductor interfaces: The inverse of the hard-soft acid-base (HSAB) concept”, Chemphyschem, in press press.Google Scholar