Abstract
Silver (Ag)-TiO2 nanoparticles synthesized by a low-temperature hydrothermal method in the anatase phase have been investigated by x-ray diffraction. Transmission electron microscopy has been used for morphological studies. Surface areas were studied by the Brunauer–Emmett–Teller method. Alternating-current (AC) conductivity and dielectric properties were studied for various dopant levels of 0.25 wt.%, 0.5 wt.%, and 1.0 wt.% at 300 K in the frequency range from 42 Hz to 5 MHz. AC conductivity and dielectric properties of TiO2 nanoparticles were greatly affected by loading with Ag. At high frequencies, the materials showed high AC conductivity and low dielectric constant. Diffuse reflectance studies were carried out for various dopant levels at 300 K by ultraviolet–visible (UV–Vis) spectroscopy. Considerable absorption of visible light by 0.5 wt.% and 1.0 wt.% Ag-TiO2 nanoparticles was observed due to the decrease of the energy band gap on Ag loading.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
S.W. Kim, T.H. Han, J. Kim, H. Gwon, H.S. Moon, S.W. Kang, S.O. Kim, and K. Kang, ACS Nano 3, 1085 (2009).
D. Kuang, J. Brillet, P. Chen, M. Takata, S. Uchida, H. Miura, K. Sumioka, S.M. Zakeeruddin, and M. Gratzel, ACS Nano 2, 1113 (2008).
K. Shankar, J. Bandara, M. Paulose, H. Wletash, O.K. Varghese, G.K. More, M. Thelakkat, and C.A. Grimes, Nanoletters 8, 1654 (2008).
J. Thomas, K. Praveen Kumar, and S. Mathew, Sci. Adv. Mater. 2, 481 (2010).
C. Lee, P. Ghosez, and X. Gonze, Phys. Rev. B 50, 13379 (1994).
S. Ko, C.K. Banerjee, and J. Sankar, Compos. B 42, 579 (2011).
C. He, Y. Yu, X.F. Hu, and A. Larbot, Appl. Surf. Sci. 200, 238 (2002).
N. Sobana, M. Muruganadham, and M. Swaminathan, J. Mol. Catal. A 258, 124 (2006).
Q. Chen, W. Shi, Y. Xu, D. Wu, and Y. Sun, Mater. Chem. Phys. 1251, 825 (2011).
J. Garcia-Serrano, E. Gomez-Hernandez, M. Ocampo- Fernandez, and U. Pal, Curr. Appl. Phys. 9, 1097 (2009).
T. Trung, W.J. Cho, and C.S. Ha, Mater. Lett. 57, 2746 (2003).
C.H. Lu and M.C. Wen, J. Alloys Compd. 448, 153 (2008).
B. Jiang, H. Yin, T. Jiang, J. Yan, Z. Fan, C. Li, J. Wu, and Y. Wada, Mater. Chem. Phys. 92, 595 (2005).
D. Byun, Y. Jin, B. Kim, J.K. Lee, and D. Park, J. Hazard. Mater. 73, 199 (2000).
E. Gyorgy, G. Socol, E. Axente, I.N. Mihailescu, C. Ducu, and S. Cluca, Appl. Surf. Sci. 247, 429 (2005).
K. Funke, Prog. Solid State Chem. 22, 111 (1993).
A.K. Abdul Gafoor, J. Thomas, M.M. Musthafa, and P.P. Pradyumnan, J. Electron. Mater. 40, 2152 (2011).
S. Mona and M.S.A. Abdel-Mottaleb, Inorg. Chem. Acta 360, 2863 (2007).
H.E. Chao, Y.U. Yun, H.U. Xingfang, A. Larbot, and Euro, J. Eur. Ceram. Soc. 23, 1457 (2003).
D. Singh, P. Yadev, N. Singh, C. Kant, M. Kumar, S.D. Sharma, and K.K. Saini, J. Exp. NanoSci. (2011). doi:10.1080/17458080.2011.564215.
A.T. Raghavender and K.M. Jadev, Bull. Mater. Sci. 32, 575 (2009).
C. Koops, Phys. Rev. 83, 121 (1951).
K. Karthik, S. Kesavapandian, and N. Victor Jaya, Appl. Surf. Sci. 256, 6829 (2010).
I. Sakellis, A.N. Papathanassiou, and J. Grammatikakis, Appl. Phys. Lett. 97, 042904 (2010).
M.S. Lee, S.-S. Hong, and M. Mohseni, J. Mol. Catal. A 242, 135 (2005).
J. Yu, J. Xiong, B. Cheng, and S. Liu, Appl. Catal. B 60, 211 (2005).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Abdul Gafoor, A., Musthafa, M. & Pradyumnan, P. AC Conductivity and Diffuse Reflectance Studies of Ag-TiO2 Nanoparticles. J. Electron. Mater. 41, 2387–2392 (2012). https://doi.org/10.1007/s11664-012-2174-7
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11664-012-2174-7