Formation of Single-phase CuO Quantum Particles

Borgohain, Kavita; Mahamuni, Shailaja

doi:10.1557/jmr.2002.0180

Cited by 95 publications

(55 citation statements)

References 32 publications

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“…All samples appeared a maximum absorption peak at about 262, 268 and 285 nm when using ethanol water, methanol and as solvents respectively. The energy gap of the samples of copper oxide nanoparticles synthesized using photolysis method was determined (Table-1) using spectrum of UV-visible by edge of absorption of nanoparticles from the formula: Eg = 1240/λmax A blue shift appeared in energy with decreasing the size of particles due to the quantum confinement effect [24,25] and the exaction Bohr radius, corresponds to a principal shift in optical and electronic properties [26]. …”

Section: Resultsmentioning

confidence: 99%

Effect of Solvents on Size of Copper Oxide Nanoparticles Fabricated using Photolysis Method

Mahmoud¹,

Kareem²,

Kareem³

2017

Asian J. Chem.

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INTRODUCTIONInorganic nanostructures materials with fully-determined morphologies having excellent properties and probable applications have received major attention in recent years. The nanoparticles of metal oxide are prominent in inorganic material research for developing different practical applications and these nanoparticles have individual chemical properties [1][2][3] depends on their structure, composition, shape and size [4][5][6]. Copper oxide nanoparticles are the most studied materials between all the metal oxides because of interesting properties as a p-type semiconductor with the possibility of a large difference in energy band gap. Copper oxide are used in many different applications such as nanofluid [7] [19]. Of all the above synthesis procedure, it appears to be very difficult to get a pure crystal of copper oxide material without adding many stabilizing agents. Actually, as it was adduced [20], the elaboration of copper oxide nanoparticles is usually accompanied by the presence of side product such Cu2O or Cu(OH)2. For this, the defy taken up in this paper is to fabricate pure copper oxide nanoparticles, in the nano range, using novel and the low-cost photolysis method without adding any stabilizing agent. This Copper oxide nanoparticles with different size were successfully fabricated by the photolysis method through the irradiation of copper oxalate complex with different solvents. The effect of the type of solvent on the size of nanoparticles was investigated. The structure and size of nanoparticles were determined using XRD and TEM, while the spectral properties of copper oxide nanoparticles investigated using FTIR and UV-visible. XRD diffraction studies obtained pure monoclinic structure of copper oxide without secondary phase and the size of particles (8.4 to 11.4 nm) depends strongly on the dielectric constant of solvents and the smallest particles of copper oxide were showed when using the ethanol as solvent. A blue shift in the essential gap energy (from 4.21 to 4.58 eV) due to the quantum confinement effect, is obtained in the spectra analysis when the particles size decreases. Effect of Solvents on Size of Copper Oxide Nanoparticles Fabricated using Photolysis Method Keywords: Copper oxide nanoparticles, Photolysis, Irradiation, Quantum confinement.process contained irradiation the complex or salt of copper to transform it from the oxidation state (+2) to oxidation state (+1) using an ice bath to avoid the high temperature then, the product burned at 300 °C. Furthermore, as it can be abstracted from this work when the fabricate parameters are well optimized, the photolysis method can produce a pure product. In this framework, the paper aim to study the effect of the solvent nature on the size of particles of the as-prepared copper oxide nanoparticles. EXPERIMENTALCopper oxide nanoparticles were prepared using potassium oxalate and copper sulphate (Sigma Aldrich, 99 %) as precursors.Preparation of complex and copper oxide nanoparticles: In two separate beakers, 3.1 g of potassium ox...

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Section: Resultsmentioning

confidence: 99%

Effect of Solvents on Size of Copper Oxide Nanoparticles Fabricated using Photolysis Method

Mahmoud¹,

Kareem²,

Kareem³

2017

Asian J. Chem.

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“…Fig[3.8] shows the scanning electron microscopy (SEM) micrograph of prepared Cd-doped CuOnano particle scanned by 20KV electron beam atX20,000,X30,000 and X10,000,X55,000 different magnification. The SEM image reveals the crystalline, porous [11,12] morphology with the inter-connected grain presented on the nano surface. The small crystallites agglomerated to form nanoflower with stem, rice like structure nano particle may provide novel platform for photovoltaic sensor and other device applications.…”

Section: Surface Morpholody 331 Scanning Electron Microscopementioning

confidence: 99%

“…The reason for anti-bacterial studies is due to the presence of reactive oxygen species generated by different nanoparticles [12][13][14][15][16]. Chemical interaction between hydrogen peroxide and membrane proteins or between the chemical produced in the presence of CuO, Ni CuOnano particles and the outer bilayer hydrogen peroxide to medium.…”

Section: 6antibacterial Activitymentioning

confidence: 99%

Structural and Antibacterial Activity of Copper Oxide Nano Particles

Jeyakumari¹,

Ramakrishnan²,

Nithyanandhi³

et al. 2017

IOSR JAP

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“…[28] Below the Bohr exciton radius in the range of 6.6-28.7 nm, a fundamental shift in electronic and optical properties of materials can be observed. [29] The Figure 7. Absorption spectra (left) and plot of (αhν) 2 versus hν (right) of CuO films prepared with different NaOH concentrations after annealing at 300°C for 3 h.…”

Section: Optical and Photocatalytic Properties Of The Cuo Filmmentioning

confidence: 99%

Self‐Assembly Growth and Photocatalytic Performance of Nanostructured Copper Compounds

et al. 2015

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Flowerlike CuO structures were synthesized by a simple chemical method. These 3D structures are formed by selfassembly growth of smaller nanosheets as basic building units. Their crystalline phase, morphology, and optical properties were characterized by XRD, field-emission SEM, and UV/Vis absorption spectroscopy. The effect of annealing on the morphology and properties of nanostructured Cu(OH) 2 / CuO was also investigated. The obtained CuO nanosheets with highly energetic (111) facets have excellent capacity for

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Formation of Single-phase CuO Quantum Particles

Cited by 95 publications

References 32 publications

Effect of Solvents on Size of Copper Oxide Nanoparticles Fabricated using Photolysis Method

Effect of Solvents on Size of Copper Oxide Nanoparticles Fabricated using Photolysis Method

Structural and Antibacterial Activity of Copper Oxide Nano Particles

Self‐Assembly Growth and Photocatalytic Performance of Nanostructured Copper Compounds

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