Controlled synthesis of monodispersed CuO nanocrystals

Fan, Haiming; Liu, Yang; Hua, Wenshen; Wu, Xuesong; Wu, Zhenyu; Xie, Shuifen; Zou, B. S.

doi:10.1088/0957-4484/15/1/007

Cited by 176 publications

(67 citation statements)

References 21 publications

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“…X-ray diffraction studies confirmed that the synthesized materials were ZnO with wurtzite phase, and all the diffraction peaks agreed with the reported JCPDS data, and no characteristic peaks were observed other than ZnO. The mean grain size (D) of the particles was determined from the XRD line broadening measurement using Scherrer equation [29]:…”

Section: X-ray Diffraction Of Zno Nanoparticlessupporting

confidence: 79%

Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode

et al. 2012

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The direct electrochemistry of cytochrome c (cyt c) immobilized on a modified carbon paste electrode (CPE) was described. The electrode was modified with ZnO nanoparticles. Direct electrochemistry of cytochrome c in this paste electrode was easily achieved, and a pair of well-defined quasireversible redox peaks of a heme Fe (III)/Fe(II) couple appeared with a formal potential (E 0 ) of −0.303 V (versus SCE) in pH 7.0 phosphate buffer solution (PBS). The fabricated modified bioelectrode showed good electrocatalytic ability for reduction of H 2 O 2 . The preparation process of the proposed biosensor was convenient, and the resulting biosensor showed high sensitivity, low detection limit, and good stability.

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Section: X-ray Diffraction Of Zno Nanoparticlessupporting

confidence: 79%

Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode

et al. 2012

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“…Graphene oxide-supported CuO-NPs are using to make the nanohybrids catalysts [11]. The CuO-NPs can be synthesized using different methods such as wet chemical method [12], hydrothermal microwave [13], precipitation pyrolysis [14], electrochemical method [15], and microwave irradiation [16].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Copper Oxide Nanoparticles Synthesized via Chemical Precipitation Method

Luna¹,

Hilary²,

Chowdhury³

et al. 2015

OALib

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Copper oxide nanoparticles (CuO-NPs) were synthesized via chemical precipitation method using copper (II) chloride dihydrate and sodium hydroxide. Then nanoparticles were characterized by using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX), and Fourier Transform Infra Red (FTIR) spectroscopy. The XRD patterns and EDX spectra showed that the prepared CuO-NPs were highly pure, crystalline and nano-sized. The SEM image suggested that nano particles were spherical and there was a tendency of agglomerations. The nanoparticles showed interactions between copper and oxygen atoms supported by FTIR studies.

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“…In this case, the Cu 2+ ion is coordinated with OH -ions, which leads to the formation of elongated chains, which serve in the formation of two-dimensional structure. Such two-dimensional structures rearrange into three-dimensional crystals by means of relatively weak hydrogen bonds [8].…”

Section: Resultsmentioning

confidence: 99%

“…The cupric oxide powder was prepared according to Fan et al [8]. The starting malachite was roasted at different temperatures (250, 300, 400, and 500°C) to obtain nanosized cupric oxide with controlled particle size.…”

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confidence: 99%

Effect of the means of preparation of nanodispersed CuO/MgO catalysts on their activity in the oxidation of CO

et al. 2008

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A method is proposed for obtaining copper-containing catalysts by means of mechanical mixing of previously formed monodispersed CuO nanoparticles (mean particle diameter 12 nm) with MgO. Higher activity was found for these catalysts in the oxidation of carbon monoxide than for the analogous copper-containing systems prepared by impregnation and deposition of cupric oxide nanoparticles from colloidal solution.Key words: cupric oxide nanoparticles, thermal decomposition of malachite, crystallite size, CO oxidation.Nanoparticles of metals and metal oxides with diameter not greater than 100 nm display unique properties, which are different from those characteristic for the bulk substances. The thermal, magnetic, optical, and catalytic characteristics of these materials are altered due to the effect of particle size [1-3].Catalysts derived from copper and its oxides are commonly used in many chemical reactions, including the preparation of methanol and higher alcohols from synthesis gas, the oxidation of organic and organosulfur compounds, the removal of CO and hydrocarbons from exhaust gases, water displacement, and steam reforming of low-molecular-weight alcohols with the production of hydrogen [1][2][3][4][5][6]. This common use of copper catalysts in various chemical reactions is attributed to their high activity related to facile electron transfers between copper in various oxidation states (Cu 0 , Cu 1+ , Cu 2+ ). We should also expect dimensional effects in the use of highly-dispersed copper catalysts in the low-temperature oxidation of CO and organic compounds.Various methods are used to prepared nanodimensional particles of copper and copper oxides, including template synthesis, coprecipitation, thermal decomposition, pyrolysis, photolysis, CVD synthesis, reduction of alcohols using various agents, and pulse wave treatment [2, 3, 7-10].In the present work, we studied the feasibility of controlling the size of CuO particles supported on MgO by altering the conditions of their preparation and investigated the effect of the size factor on the catalytic properties of the systems obtained in CO oxidation taken as a model reaction. EXPERIMENTALThree methods were used to prepare the CuO/MgO catalysts: 1) deposition from colloidal solution, 2) mechanical mixing of the components, and 3) impregnation.The deposition of cupric oxide nanoparticles from colloidal solution is attractive since it permits us to obtain highly dispersed catalysts with a narrow distribution of particles of the active component on the support surface but a difficulty is 172 0040-5760/08/4403-0172

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Controlled synthesis of monodispersed CuO nanocrystals

Cited by 176 publications

References 21 publications

Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode

Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode

Preparation and Characterization of Copper Oxide Nanoparticles Synthesized via Chemical Precipitation Method

Effect of the means of preparation of nanodispersed CuO/MgO catalysts on their activity in the oxidation of CO

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