title: Green synthesis of colloidal copper oxide nanoparticles using Carica papaya and its application in photocatalytic dye degradation.
abstract: Copper oxide (CuO) nanoparticles were synthesized by treating 5 mM cupric sulphate with Carica papaya leaves extract. The kinetics of the reaction was studied using UV-visible spectrophotometry. An intense surface Plasmon resonance between 250-300 nm 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 140 nm, further negative zeta potential disclose its stability at -28.9 mV. 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.
authors.affiliation: Department of Biochemistry, School of Life Science, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
authors.forename: Renu
authors.initials: R
authors.lastname: Sankar
authors.affiliation: Department of Biochemistry, School of Life Science, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
authors.forename: Perumal
authors.initials: P
authors.lastname: Manikandan
authors.affiliation: Department of Biochemistry, School of Life Science, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India.
authors.forename: Viswanathan
authors.initials: V
authors.lastname: Malarvizhi
authors.affiliation: Department of Biotechnology and Genetic Engineering, Bharathidasan University, Tiruchirapalli 620 024, Tamilnadu, India.
authors.forename: Tajudeennasrin
authors.initials: T
authors.lastname: Fathima
authors.affiliation: Regional Forensic Science Laboratory, Tiruchirapalli, Tamilnadu, India. Electronic address: shivashangari@gmail.com.
authors.forename: Kanchi Subramanian
authors.initials: KS
authors.lastname: Shivashangari
authors.affiliation: Department of Biochemistry, School of Life Science, Bharathidasan University, Tiruchirappalli 620 024, Tamilnadu, India. Electronic address: ravikumarbdu@gmail.com.
authors.forename: Vilwanathan
authors.initials: V
authors.lastname: Ravikumar
mesh_terms: D029441:Carica / Q000737:chemistry*; D002384:Catalysis / Q000528:radiation effects; D003102:Colloids; D004396:Coloring Agents / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D055772:Green Chemistry Technology / Q000379:methods*; D008027:Light; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D010782:Photolysis; D012542:Scattering, Radiation; D013052:Spectrometry, X-Ray Emission; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D055672:Static Electricity; D014961:X-Ray Diffraction
chemical_list: D003102:Colloids; D004396:Coloring Agents; D003300:Copper; C000520:cuprous oxide
keywords: Carica papaya; Coomassie brilliant blue; Copper oxide nanoparticles; FT-IR; Photocatalytic activity; Rod shape