Record Details

Morphology dependent photocatalytic and magnetic properties of ZnO nanostructures

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Morphology dependent photocatalytic and magnetic properties of ZnO nanostructures
 
Creator GUPTA, J
BHARGAVA, P
BAHADUR, D
 
Subject Nanostructures
ZnO
Oxygen defect
Magnetism
Photocatalysis
DOPED ZNO
NANOPARTICLES
FERROMAGNETISM
TEMPERATURE
TRANSPARENT
 
Description Zinc oxide (ZnO) nanostructures of different morphology are synthesized by simple soft-chemical approaches. X-ray diffraction and Raman spectra reveal the formation of highly crystalline single-phase hexagonal wurtzite nanostructures of ZnO. TEM micrographs indicate that ZnO nanoparticles are spherical in shape having a size of about 8 nm whereas the length of ZnO nanorods are about 30-40 nm. SEM micrographs show that ZnO nanoassembly is spherical and porous and is about 100-400 nm in size whereas the length of the ZnO microroth are about 4-5 mu m having a diameter of about 150 nm. The ZnO microdiscs are 2-3 mu m in size. Photoluminescence spectra of the various ZnO nanostructures show that the near band edge emission of ZnO is strongly dependent on their size and shape. Furthermore, the sharp decrease in the intensity of green emission as shape and size changes from nano to microstructures undoubtedly indicates the suppression of oxygen vacancies due to change in the surface to volume ratio i.e. decrease in the surface area from nano to microstructures. Thus, photocatalytic performance of ZnO nanostructures strongly depends on the presence of oxygen vacancies as well as higher surface area ZnO nanostructures show size, shape and defect concentration dependent ferromagnetic behavior and photocatalytic activity. (C) 2014 Elsevier B.V. All rights reserved.
 
Publisher ELSEVIER SCIENCE BV
 
Date 2014-12-28T16:30:45Z
2014-12-28T16:30:45Z
2014
 
Type Article
 
Identifier PHYSICA B-CONDENSED MATTER, 44816-19
0921-4526
1873-2135
http://dx.doi.org/10.1016/j.physb.2014.03.081
http://dspace.library.iitb.ac.in/jspui/handle/100/16889
 
Language English