Photocatalytic degradation effect of malachite green and catalytic hydrogenation by UV-illuminated CeO2/CdO multilayered nanoplatelet arrays: Investigation of antifungal and antimicrobial activities.
CeO2/CdO multi-layered nanoplatelet arrays have been synthesized by sol-gel method at two different temperatures using Citrus limonum fruit extract and the effect of particle size on the photocatalytic performance is studied. The particle size and phases was analysed by X-ray diffraction pattern (XRD) which brought out the formation of cubic phase in the synthesized samples. Field Emission Scanning electron microscopy (FESEM) revealed the surface morphology and made up of cumulative form of platelet shaped arrays with an average size of 10nm. The elemental composition and the purity of the nanomaterials were confirmed by Energy Dispersive X-ray spectroscopy (EDX). CeO2/CdO multilayered binary metal oxide nanoplatelet arrays were formed which was further explored with Fourier transform infrared spectroscopy (FTIR), it reveals that the nanocomposites contain CeO and CdO bonds. Determination of the direct and indirect bandgap energy of the nanoplatelet arrays was carried out by UV-Vis-DRS studies. In MG degradation, both the hole (h+) and hydroxyl radical (OH) played a major role than the superoxide radical (O2-). Possible photo degradation mechanisms are proposed and discussed in this article. CeO2/CdO multi-layered nanoplatelet arrays showed antibacterial activity and among the tested ones, it showed better growth inhibition towards P. aeruginosa MTCC73. Thus, this greener synthetic procedure was a highly effective method due to low-cost, highly effective UV light responsive material for environmental safety.
Department of Chemistry, St. Xavier's College (Autonomous), Tirunelveli 627002, India; LIFE, Department of Chemistry, Loyola College (Autonomous), Chennai 600034, India.
C
C
Maria Magdalane
UNESCO-UNISA Africa Chair in Nanoscience's/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; Nanosciences African network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, P O Box722, Somerset West, Western Cape Province, South Africa. Electronic address: kavi@tlabs.ac.za.
K
K
Kaviyarasu
Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College (Autonomous), Chennai 600034, India.
J
J
Judith Vijaya
LIFE, Department of Chemistry, Loyola College (Autonomous), Chennai 600034, India.
C
C
Jayakumar
UNESCO-UNISA Africa Chair in Nanoscience's/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; Nanosciences African network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, P O Box722, Somerset West, Western Cape Province, South Africa.
M
M
Maaza
LIFE, Department of Chemistry, Loyola College (Autonomous), Chennai 600034, India. Electronic address: jeyaraj.boniface@gmail.com.
B
B
Jeyaraj
D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000494:pharmacology; D000935:Antifungal Agents / Q000737:chemistry* / Q000494:pharmacology; D019187:Cadmium Compounds; D002384:Catalysis; D002563:Cerium; D002957:Citrus / Q000737:chemistry; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006865:Hydrogenation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D010087:Oxides; D010316:Particle Size; D011550:Pseudomonas aeruginosa / Q000187:drug effects / Q000528:radiation effects; D012394:Rosaniline Dyes / Q000494:pharmacology; D014466:Ultraviolet Rays
D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D019187:Cadmium Compounds; D010087:Oxides; D012394:Rosaniline Dyes; C029663:cadmium oxide; C005095:malachite green; D002563:Cerium; C030583:ceric oxide
Catalytic hydrogenation; CdO; CeO(2); DRS; Malachite green; Photocatalytic studies