Sahu, Ranjan K and Ganguly, Koustav and Mishra, T and Mishra, M and Ningthoujam, R S and Roy, S K and Pathak, L C (2012) Stabilization of intrinsic defects at high temperatures in ZnO nanoparticles by Ag modification. Journal of Colloid and Interface Science, 366 (1). pp. 8-15.
Restricted to NML users only. Others may use ->
The stabilization of defects in ZnO at high temperatures has been investigated. The properties of unmodified and modified ZnO nanoparticles (NPs) with 2 at.% of Ag prepared by microwave assisted combustion method, have been systematically studied using X-ray diffraction (XRD), photoluminescence (PL), X-ray photoelectron spectroscopy (XPS) and photocatalytic activity measurements. Though the XRD data shows a marginal shift in the ZnO peak position upon Ag addition, the amount of shift does not change with annealing temperatures. The PL data reveals that the defect mediated visible emission intensity of unmodified ZnO NPs increases with increase in the annealing temperature, whereas it remains almost unchanged in Ag–ZnO. This study clearly establishes that silver is an efficient stabilizer of intrinsic defects in ZnO at high temperatures. This is further supported by the core and valence band XPS spectra.
|Uncontrolled Keywords:||Ag modification; ZnO nanoparticles (NPs); Thermal stabilization of defects; Annealing effect|
|Divisions:||Material Science and Technology|
|Deposited By:||Dr. A K Sahu|
|Deposited On:||23 Nov 2011 14:34|
|Last Modified:||13 Nov 2013 16:39|
Repository Staff Only: item control page