Physico-Chemical nanomaterials science

Photoluminescent properties in different gas ambient of ZnO nanopowders doped by Mo and V
Venhryn Yu.I.1, Serednytski A.S.1, Popovych D.I.1
1 Pidstryhach Institute for Applied Problems of Mechanics and Mathematics NAS of Ukraine. Naukova str., 3b, Lviv-79060, Ukraine.
E-mail: popovych@iapmm.lviv.ua

The researches structural, morphological and photoluminescent properties of ZnO nanopowders doped by Co and V obtained using pulsed laser reactive technology is carried out. Electron microscopy and X-ray diffractometry were conducted to determine the structure, shape, and size of the nanoparticles. Investigation the peculiarities of photoluminescence (PL) in different ambient of Mo and V doped ZnO nanopowders was carried out. Changing the gas environment leads to a significant change in the intensity of the PL spectra and its deformation, that can be used in the gas sensors. The PL spectra of all sample consist strong emission bands located in the UV-range and broad non-elemental emission band in the visible region from 410 to 600 nm (Fig. 1). The decomposition of PL spectra into elementary bands shows the presence elementary peaks of 430, 520 nm. The influence of the impurity and the gas medium on the redistribution of elementary luminescence bands intensities was investigated.
		
а)	b)	
Fig.1. Photoluminescent spectra in different ambient of ZnO nanopowders doped by 
a) Mo b) V.	
1.	Zhyrovetsky V.M., Popovych D.I., Savka S.S., Serednytski A.S. Nanopowder Metal Oxide for Photoluminescent Gas Sensing // Nanoscale Research Letters -2017. -12. -P.132(5).