Effect of NaOH concentration on structural, surface and antibacterial activity of CuO nanorods synthesized by direct sonochemical method

Sonia, S.; Jayram, Naidu Dhanpal; Kumar, P. Suresh; Mangalaraj, D.; Ponpandian, N.; Viswanathan, C.

doi:10.1016/j.spmi.2013.10.020

Cited by 63 publications

(22 citation statements)

References 26 publications

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“…Along with this the size, shape, structure and composition of nanomaterials also plays a crucial role in the antibacterial activity [45]. The nano-biointerface is an important phenomenon for the understanding of antibacterial activity [23][24][25][26]. The interface between a nanoparticle and any living moiety or biomaterial is termed as nanobiointerface.…”

Section: Antibacterial Activity Studymentioning

confidence: 99%

“…Number of organic substances shows the antibacterial activity but most of them are toxic in nature. Hence in the recent years there is growing demand for metal oxide nanoparticles as antibacterial agent due to their high stability and non toxic nature [23][24][25]. Recently Zollfrank et al reported that antimicrobial activity of transition metal acid MoO 3 is related to their surface acidity involving the intermediate formation of molybdic acid [26].…”

Section: Introductionmentioning

confidence: 99%

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Chemically Grown MoO3 Nanorods for Antibacterial Activity Study

Desai¹,

Mali²,

Kondalkar³

et al. 2015

J Nanomed Nanotechnol

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In the present investigation, sea urchin like morphology of h-MoO 3 nanorods are successfully synthesized by chemical bath deposition (CBD) technique. The thermal stability, structural details, morphology and compositional analysis of MoO 3 was done using thermogravimetry (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED) and X-ray photoelectron spectroscopy (XPS) techniques respectively. The thermal analysis reveals presence of sharp exothermic peak at 409ºC indicating irreversible phase transition. X-ray diffraction pattern showed hexagonal to orthorhombic phase transition after annealing at 450ºC. As synthesized h-MoO 3 shows well oriented hexagonal rods with sea urchin like architecture while that of annealed MoO 3 sample revealed 2D layer by layer growth. The SAED pattern confirms single crystalline nature of as synthesized h-MoO 3 and polycrystalline nature of annealed α-MoO 3 . While XPS study of both confirms Mo +6 and O 2-oxidation states of elements. Furthermore, characteristic antibacterial properties of h-MoO 3 and α-MoO 3 against gram positive Bacillus megaterium, Streptococcus aureus and gram negative Escherichia coli is noted.

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Section: Antibacterial Activity Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chemically Grown MoO3 Nanorods for Antibacterial Activity Study

Desai¹,

Mali²,

Kondalkar³

et al. 2015

J Nanomed Nanotechnol

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“…Copper oxide are used in many different applications such as nanofluid [7], gas sensors [8], anodes in battery [9], magnetic storage media [10], photodetectors [11], energetic materials [12], photocatalysis [13], antibacterial materials [14] and many others. Through the past few years, several methods used to fabricate the copper oxide nanoparticles including sol gel [15], hydrothermal [16], sonochemical [17], microwave [18] and solvothermal [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.…”

Section: Introductionmentioning

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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“…Generally, copper oxide is in two common forms; one is cupric oxide (tenorite-CuO) and another one is cuprous oxide (cuprite-Cu 2 O). Cupric oxide is a monoclinic p-type semiconductor with a band gap of 1.2-1.5 eV at room temperature [6], whereas cuprous oxide (Cu 2 O) is a cubic p-type semiconductor with a direct band gap of 1.9-2.2 eV having high exciton binding energy (*140 meV) [7]. It is an environmentfriendly, low-cost, non-toxic material, available in abundance.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Structural and Optical Properties of SILAR-Deposited Cu2O Films Through Zn Doping

Ravichandran

Dhanabalan

Ravichandran³

et al. 2015

Acta Metall. Sin. (Engl. Lett.)

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Undoped and Zn-doped Cu 2 O films were deposited onto glass substrates using successive ionic layer adsorption and reaction (SILAR) technique with different Zn doping levels (0, 1, 2, 3, 5 and 10 wt%). The structural, optical, and surface morphological studies were carried out and reported. The structural study revealed that the crystalline quality is gradually enhanced up to 5 wt% of Zn doping level, and then quality begins to degrade for further increase in doping level. Moreover, the preferential orientation changes from (111) to (110) for the highest doping level were examined. Optical study shows that the transmittance (65%) and optical band gap values are maximum (2.41 eV) when the Zn doping level is at 5 wt%. The photoluminescence study confirms the presence of various defects in the Cu 2 O matrix and also the variation obtained in the optical band gap from the transmittance data. SEM images revealed the annealinginduced changes in the surface morphology of the films.

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Effect of NaOH concentration on structural, surface and antibacterial activity of CuO nanorods synthesized by direct sonochemical method

Cited by 63 publications

References 26 publications

Chemically Grown MoO3 Nanorods for Antibacterial Activity Study

Chemically Grown MoO3 Nanorods for Antibacterial Activity Study

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

Tuning the Structural and Optical Properties of SILAR-Deposited Cu2O Films Through Zn Doping

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