Sonochemical synthesis of CuO nanostructures with different morphology (original) (raw)
Related papers
Easy, Quick, and Reproducible Sonochemical Synthesis of CuO Nanoparticles
Materials
Copper oxide nanoparticles (CuO NPs) were synthesized in air by reducing copper (II) sulfate pentahydrate salt (CuSO4·5H2O) in the presence of sodium borohydride. The reaction was stabilized with Hexadecyltrimethylammonium bromide (CTAB) in a basic medium and using ultrasound waves. Different molar ratios of CTAB:Cu2+ and NaBH4:Cu2+ were explored, to optimize the synthesis conditions, and to study the stability, size, and Zeta potential of the colloidal suspension. Optimum conditions to generate spherical, stable, and monodispersed nanoparticles with hydrodynamic diameters of 36 ± 1.3 nm were obtained, using 16 mM CTAB and 2 M NaBH4 (molar ratios Cu2+:CTAB:NaBH4 of 1:6:10). X-ray diffraction (XRD) was implemented, and a monoclinic CuO crystal system was formed. This demonstrated a monoclinic crystal system corresponding to CuO. The diffraction peaks were identified and confirmed according to their selected area electron diffraction (SAED) patterns.
Sonochemical Synthesis and Characterization of Copper Oxide Nanoparticles
Energy Procedia, 2011
Copper oxide (CuO) nanoparticles were synthesized by a sonochemical process using copper nitrate and sodium hydroxide in the presence of polyvinyl alcohol (PVA) as a starting precursor. The precipitated product was calcined at various temperature ranging from 400-700°C.The physical microstructure and morphology of as-calcined nanoparticles were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). From XRD observation, it
Ultrasonics Sonochemistry, 2008
Cu 2 O nanopowders have been prepared by ultrasound-assisted electrochemistry with a potentiostatic set-up. Their composition has been determined by X-ray diffraction and energy dispersive X-ray spectroscopy. Transmission electron microscopy and centrifugation analyses indicate that the nanopowders consist of agglomerates of variable nanometric diameter grain. Most of particles have a diameter of 8 nm whatever the electrodeposition potential. The influence of the parameters of electrochemical and ultrasonic pulses on the particle diameter was also studied. The specific surface areas determined by Brunauer-Emmet-Teller (BET) model are very high with a value close to 2000 m 2 g À1 .
A controlled synthesis of CuO nanostructures with various morphologies were successfully achieved by presence/absence of low frequency (42 kHz) ultrasound with two different methods. The size, shape and morphology of the CuO nanostructures were tailored by altering the ultrasound, mode of addition and solvent medium. The crystalline structure and molecular vibra-tional modes of the prepared nanostructures were analysed through X-ray diffraction and FTIR measurement, respectively which confirmed that the nanostructures were phase pure high-quality CuO with monoclinic crystal structure. The morphological evaluation and elemental composition analysis were done using TEM and EDS attached with SEM, respectively. Furthermore, we demonstrated that the prepared CuO nanostructures could be served as an effective photocatalyst towards the degradation of methyl orange (MO) under visible light irradiation. Among the various nanostructures, the spherical shape CuO nanos-tructures were found to have the better catalytic activities towards MO dye degradation. The catalytic degradation performance of MO in the presence of CuO nanostructures showed the following order: spherical \ nanorod \ lay-ered oval \ nanoleaf \ triangular \ shuttles structures. The influence of loading and reusability of catalyst revealed that the efficiency of visible light assisted degradation of MO was effectively enhanced and more than 95 % of degradation was achieved after 3 cycles.
Journal of Electronic Materials, 2016
Shape control of inorganic nanostructures generally requires using surfactants or ligands to passivate certain crystallographic planes. This paper describes a novel additive-free synthesis of cupric oxide nanostructures with different morphologies from the aqueous solutions of copper(II) with Cl À , NO 3 À , and SO 4 2À as counter ions. Through a one-step approach, CuO nanoleaves, nanoparticles and flower-like microspheres were directly synthesized at 80°C upon exposure to ammonia vapor using a cupric solution as a single precursor. Furthermore, during a two-step process, Cu(OH) 2 nanofibers and nanorods were prepared under an ammonia atmosphere, then converted to CuO nanostructures with morphology preservation by heat treatment in air. The as-prepared Cu(OH) 2 and CuO nanostructures are characterized using xray diffraction, scanning electron microscopy and Fourier transformation infrared spectroscopy techniques.
CuO nanostructures prepared by a chemical method
Journal of Crystal Growth, 2005
We investigated the properties of CuO nanostructures fabricated from copper(II) nitrate hydrate solutions as a function of synthesis temperature, concentration, and pH value of the solution. The properties of the fabricated nanostructures were studied using scanning electron microscopy, X-ray diffraction, and transmission electron microscopy. We found that the morphology of the obtained structures is strongly dependent on both pH value of the solution and the synthesis temperature. Synthesis conditions, such as solution concentration, temperature, and pH value, also affect the adhesion of the fabricated structures to the substrate, which is of importance for practical applications. r
A new sonochemical method for preparation of different morphologies of CuInS2 nanostructures
Bulletin of Materials Science, 2014
CuInS 2 nanostructures were synthesized by sonochemical route using (bis(salicylate)copper(II)) as a new copper precursor. The effects of different parameters such as sulphur source, solvent, power of irradiation and reaction time on the morphology of the products were investigated. Nanostructures were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photoluminescence (PL) and Fourier transform infrared (FT-IR) spectroscopy. CuInS 2 nanostructures paste was prepared by doctor's blade technique on the transparent conductive oxide (TCO). The fill factor (FF), open circuit voltage (V oc), and short circuit current (I sc) were obtained by I-V characterization.
The Journal of Physical …, 2008
Flower-shaped CuO nanostructures have been prepared by the simple solution process at 100°C using copper nitrate, NaOH, and hexamethylenetetramine (HMTA) for 3 h without the use of any complex reagents. The morphological investigations by field emission scanning electron microscope (FESEM) revealed that the flowershaped nanostructures are monodispersed in large quantity and exhibit the nanocrystalline nature with monoclinic structure. The flower-shaped morphologies are strongly dependent on the concentration of HMTA, presence or absence of NaOH and HMTA, and reaction time. The possible growth mechanism for the formation of flower-shaped CuO products was also discussed in detail.
Sonochemical synthesis and characterization of urchin-like Cu3CrO6·2H2O nanostructures
Materials Chemistry and Physics, 2014
The title complex[Cu(ITSCPL-2H)(NH 3)] 2. 2H 2 O (1), is reported. The structure of the title compound, C20 H34 Cu2 O6 N10 S2 as an interesting metal complex with a Schiff base derived from isothiosemicarbazide and pyridoxal (3-hydroxy-5-hydroxymethyl-2-methylpyridine-4-carboxaldehyde) is reported. Ligand pyridoxal-S-methyliso thiosemicarbazone (PLITSC; H 2 L) is tridentate ONN ligand. The Cu II environment is a square planar coordination, the equatorial plane of which is formed by the tridentate ONN-coordinated pyridoxal-Smethyliso thiosemicarbazone and one amonium molecule. This compound crystallizes in triclinic symmetry, in