Nano ZnO, Cu-doped ZnO, and Ag-doped ZnO assisted generation of light from imidazole
作者:J. Jayabharathi、C. Karunakaran、V. Kalaiarasi、P. Ramanathan
DOI:10.1016/j.jphotochem.2014.09.002
日期:2014.12
A sensitive 2-(4-methoxyphenyl)-1-(naphthalene-1-yl)-4,5-diphenyl-1H-imidazole (MNDI) fluorescent sensor for nanoparticulate ZnO has been designed and synthesized. The nanocrystalline ZnO, Cu-doped ZnO, and Ag-doped ZnO have been synthesised by sol-gel method and characterized by powder X-ray diffraction, scanning electron microscopy(SEM), UV-vis diffuse reflectance, photoluminescence and life time spectral studies. All the synthesized nanoparticles display violet emission due to charge carrier-recombination. The synthesized sensor emission is enhanced by nanocrystalline pristine ZnO but is suppressed by Cu-doped ZnO and Ag-doped ZnO nanoparticles. The suppression of fluorescence is more by copper than by silver doping. (C) 2014 Elsevier B.V. All rights reserved.