Green synthesis of colloidal copper oxide nanoparticles using Carica papaya and its application in photocatalytic dye degradation

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 121; pp. 746 - 750
• Main Authors: Sankar, Renu, Manikandan, Perumal, Malarvizhi, Viswanathan, Fathima, Tajudeennasrin, Shivashangari, Kanchi Subramanian, Ravikumar, Vilwanathan
• Format: Journal Article
• Language: English
• Published: England Elsevier B.V 05.03.2014
• Subjects: Carica - chemistry; Carica papaya; Catalysis - radiation effects; Colloids; Coloring Agents - chemistry; Coomassie brilliant blue; Copper - chemistry; Copper oxide nanoparticles; FT-IR; Green Chemistry Technology - methods; Light; Nanoparticles - chemistry; Nanoparticles - ultrastructure; Particle Size; Photocatalytic activity; Photolysis; Rod shape; Scattering, Radiation; Spectrometry, X-Ray Emission; Spectrophotometry, Ultraviolet; Spectroscopy, Fourier Transform Infrared; Static Electricity; X-Ray Diffraction; Photocatalytic activity; FT-IR; Coomassie brilliant blue; Carica papaya; Rod shape; Copper oxide nanoparticles
• ISSN: 1386-1425; 1873-3557
• DOI: 10.1016/j.saa.2013.12.020

[Display omitted] •Green synthesis of copper oxide nanoparticles using Carica papaya leaves extract.•The reaction was made at room temperature.•Characterization of copper oxide nanoparticles by UV–vis spectroscopy, DLS, SEM, FT-IR and XRD.•Photocatalytic degradation of Coomassie brilliant blue R-250 by copper oxide nanoparticles. Copper oxide (CuO) nanoparticles were synthesized by treating 5mM cupric sulphate with Carica papaya leaves extract. The kinetics of the reaction was studied using UV–visible spectrophotometry. An intense surface Plasmon resonance between 250–300nm in the UV–vis spectrum clearly reveals the formation of copper oxide nanoparticles. The results of scanning electron microscopy (SEM) and dynamic light scattering (DLS) exhibited that the green synthesized copper oxide nanoparticles are rod in shape and having a mean particle size of 140nm, further negative zeta potential disclose its stability at −28.9mV. The Fourier-transform infrared (FTIR) spectroscopy results examined the occurrence of bioactive functional groups required for the reduction of copper ions. X-ray diffraction (XRD) spectra confirmed the copper oxide nanoparticles crystalline nature. Furthermore, colloidal copper oxide nanoparticles effectively degrade the Coomassie brilliant blue R-250 dye beneath the sunlight.