The Influence of the Au Nanoparticles Dimension on the Photocatalytic Performances of TiO_2-Au Porous Composites

• Authors: G. Melinte , M. Baia , D. Georgescu , L. Baia , V. Iancu , L. Diamandescu , T. Popescu , L. Cotet , L. Barbu-Tudoran , V. Danciu , S. Simon
• Languages of publication: EN

Abstracts

EN

The influence of Au nanoparticles dimension on the photocatalytic performances of the TiO_2 aerogels-Au composites was evaluated. Structural and morphological peculiarities of the TiO_2 aerogel, unloaded and loaded with 5 and 22 nm Au nanoparticles, were studied by transmission electron microscopy technique, X-ray diffraction and N_2-sorption measurements. UV-Vis diffuse reflectance measurements were performed to determine the band gap energies. The photocatalytic activity was evaluated by monitoring the salicylic acid photodegradation. It was found that the Au nanoparticles promote the anatase phase crystallization and produce the decrease of the specific surface area and band gap energy values. The porous composite with the smallest Au nanoparticles dimension exhibits the best photocatalytic performances.

Keywords

EN

81.05.Rm   81.07.Wx   82.80.Ej   68.37.Lp   82.65.+r   82.50.Hp  

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 1
• Pages: 208-210

Dates

published

2012-01

References

• 1. D. Beydoun, R. Amal, G. Low, S. McEvoy, Nanoparticle Res. 1, 439 (1999)
• 2. N. Hüsing, U. Schubert, Angew. Chem. Int. Ed. 37, 22 (1998)
• 3. V. Subramanian, E.E. Wolf, P.V. Kamat, J. Am. Chem. Soc. 126, 4943 (2004)
• 4. S. Sakthivel, M.V. Shankar, M. Palanichamy, B. Arabindoo, D.W. Bahnemann, V. Murugesan, Water Res. 38, 3001 (2004)
• 5. U. Cernigoj, U. Lavrencic-Stangar, P. Tresbe, U.O. Krasovec, S. Gross, Thin Solid Films 495, 327 (2006)
• 6. A.M. Luis, M.C. Neves, M.H. Mendonca, O.C. Monteiro, Mater. Chem. Phys. 125, 20 (2011)
• 7. H. Li, G. Zhao, Z. Chen, B. Song, G. Han, J. Am. Ceram. Soc. 93, 445 (2010)
• 8. L. Baia, L. Diamandescu, L. Barbu-Tudoran, A. Peter, G. Melinte, V. Danciu, M. Baia, J. Alloys Comp. 509, 2672 (2011)
• 9. H. Liu, L. Zhang, N.A. Seaton, Chem. Eng. Sci. 47, 4393 (1992)

Identifiers

DOI

10.12693/APhysPolA.121.208