Fabrication of binary metal doped CuO nanocatalyst and their application for the industrial effluents treatment

Construction of ternary annular 2Z-scheme+1Heterojunction CuO/WO3/CdS/ photocatalytic system for methylene blue degradation with simultaneous hydrogen production

Effect of deposition parameters on spray pyrolysis synthesized CuO nanoparticle thin films for higher supercapacitor performance

Copper oxide nanoparticles (Cu2O/CuO NPs), zinc oxide nanoparticles (ZnO NPs) and Cu2O/CuO–ZnO nanocomposites have been prepared using Alchornea cordifolia leaf extract. The nanoparticles were synthesized using simple hydrothermal technique, followed by oven drying in the temperature range of 80–90 °C. The synthesis was monitored by UV–Vis spectroscopy, which confirmed the formation of the nanoparticles by showing peaks above 350 nm and a red shift was observed in the spectra of the nanocomposite. The structural evaluation of the nanomaterials using Fourier transform infra-red spectroscopy showed the presence of amides on their surface, indicative of their role as capping agents. The X-ray crystallographic studies showed mixed phase of Cu2O/CuO NPs, and a hexagonal wurtzite phase for both the ZnO NPs and the nanocomposites. The elemental composition of the nanomaterials were explored using energy dispersive X-ray spectroscopy which confirmed the presence of the respective metals and oxygen; and a higher percentage of Zn (32.48%) compared to Cu (4.97%), in the nanocomposite. The average size of the nanoparticles in the composites were estimated at 3.54 nm with somewhat monodispersity, whereas the monometallic oxides gave agglomerated particles. The search for improved solution to cancerous growths necessitates the verification of the synthesized nanoparticles against cervical cancer using MTT assay method. In vitro cytotoxicity tests of the nanomaterials on cervical Hela cell lines showed efficacy in the order: Cu2O/CuO–ZnO > ZnO NPs > Cu2O/CuO NPs.

Eco-friendly Synthesis of Copper Oxide, Zinc Oxide and Copper Oxide–Zinc Oxide Nanocomposites, and Their Anticancer Applications

Synthesis, characterization and visible light-responsive photocatalysis properties of Ce doped CuO nanoparticles: A combined experimental and DFT+U study

Influence of Ce doping on CuO nanoparticles synthesized by microwave irradiation method

Influence of Mn dopant on the crystallite size, optical and magnetic behaviour of CoFe2O4 magnetic nanoparticles

Nickel-substituted copper oxide nanoparticles at various concentrations were synthesized by the microwave irradiation technique. The consequence of nickel doping on crystal structure, optical prope...

Magnetic Behavior of Ni-DOPED CuO Nanoparticles Synthesized by Microwave Irradiation Method

Ferro to superparamagnetic transition: Outcome of Ni doping in polyethylene glycol capped CoFe2O4 nanoparticles

A series of Co1−xZnxFe2O4 (x = 0, 0.25, 0.5, 0.75 and 1.0) ferrite nanoparticles were synthesized by the chemical precipitation method and annealed at 800 °C for 5 h to remove the strain. Synthesized samples were characterized by means of X-ray diffraction, ultra-violet spectrometer, fluorescence spectrometer, Fourier transform infrared spectrometer, scanning and transmission electron microscope, vibrating sample magnetometer, and electron paramagnetic resonance techniques. The average crystallite size was decreased from 16.2 to 5.6 nm with increasing Zn concentration. UV–Vis absorption spectra indicate that Zn dopant decreased the energy gap of CoFe2O4 magnetic nanoparticles from 3.06 to 3.15 eV. The presence of two main metal oxide bands in FTIR spectra around 456 cm−1 and 553 cm−1 confirmed the octahedral and tetrahedral sites of metal oxide bands. The fluorescence spectra of the synthesized samples show red emission at 681 nm. TEM analysis confirmed the structural transformation from nanorods to nanoparticles as the Zn content increases. The EDAX spectrum confirmed homogeneous mixing of Co, Zn, Fe, and O atoms. VSM analysis shows that increase in Zn concentration decreased the saturation magnetization from 34.2 to 1.6 emu g−1 and the coercivity from 0.111 to 0.015 T. Due to higher coercivity (0.1112 T), synthesized CoFe2O4 nanoparticles may be useful in the production of data storage devices, permanent magnet, parts of electronic circuits, and also in stealth technology.

P. Monisha

Papers

Influence of Ce doping on CuO nanoparticles synthesized by microwave irradiation method

Influence of Mn dopant on the crystallite size, optical and magnetic behaviour of CoFe2O4 magnetic nanoparticles

Magnetic Behavior of Ni-DOPED CuO Nanoparticles Synthesized by Microwave Irradiation Method

Ferro to superparamagnetic transition: Outcome of Ni doping in polyethylene glycol capped CoFe2O4 nanoparticles

Role of Zn dopant on superparamagnetic property of CoFe 2 O 4 nanoparticles