Highly active lanthanum doped ZnO nanorods for photodegradation of metasystox.
La-doped ZnO nanorods with different La contents were synthesized by microwave assisted method and characterized by various sophisticated techniques such as XRD, UV-Vis., EDS, XPS, SEM and TEM. The XRD patterns of the La-doped ZnO indicate hexagonal crystal structure with an average crystallite size of 30nm. It was found that the crystallite size of La-doped ZnO is much smaller as compared to pure ZnO and decreases with increasing La content. The photocatalytic activity of 0.5mol% La-doped ZnO in the degradation of metasystox was studied. It was observed that degradation efficiency of metasystox over La-doped ZnO increases up to 0.5mol% doping then decreases for higher doping levels. Among the catalyst studied, the 0.5mol% La-doped ZnO was the most active, showing high photocatalytic activity for the degradation of metasystox. The maximum reduction of concentration of metasystox was observed under static condition at pH 8. Reduction in the Chemical Oxygen Demand (COD) of metasystox was observed after 150min. The cytotoxicological studies of meristematic root tip cells of Allium cepa were studied. The results obtained indicate that photocatalytically degraded products of metasystox were less toxic as compared to metasystox.
Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416 004, Maharashtra, India.
P V
PV
Korake
Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416 004, Maharashtra, India.
R S
RS
Dhabbe
Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416 004, Maharashtra, India.
A N
AN
Kadam
Department of Zoology, Shivaji University, Kolhapur 416 004, Maharashtra, India.
Y B
YB
Gaikwad
Nanomaterials Research Laboratory, Department of Chemistry, Shivaji University, Kolhapur 416 004, Maharashtra, India. Electronic address: kmg_chem@unishivaji.ac.in.
K M
KM
Garadkar
D002384:Catalysis; D007306:Insecticides / Q000737:chemistry* / Q000633:toxicity; D007811:Lanthanum / Q000737:chemistry*; D018519:Meristem / Q000166:cytology; D043942:Nanotubes / Q000737:chemistry* / Q000528:radiation effects; D019697:Onions / Q000187:drug effects; D009946:Organothiophosphorus Compounds / Q000737:chemistry* / Q000633:toxicity; D010782:Photolysis; D013472:Sunlight; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects
D007306:Insecticides; D009946:Organothiophosphorus Compounds; D007811:Lanthanum; C026086:methyl demeton; D015034:Zinc Oxide
Cytotoxicological study; Lanthanum doping; Optical properties; Pesticide; Photocatalytic activity; Zinc oxide nanorods