Synthesis of CuO nanoflower and its application as a H2O2 sensor

Gu, Aixia; Wang, Guangfeng; Fang, Bin

doi:10.1007/s12034-010-0002-3

Cited by 68 publications

(26 citation statements)

References 16 publications

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“…Figure 1 displays the XRD profiles of the CuO nanostructures synthesized using different concentrations of NaOH. All of the Bragg's reflections can be indexed to the monoclinic-phase [17][18][19] of CuO (space group C2/c), which is very close to the reported data (JCPDS 48-1548) whereas no characteristic peaks of any other impurities such as Cu(OH) 2 , Cu 2 O, or precursors used were observed. In all cases, peak broadening was observed, which depicts the nanostructural crystalline domains in CuO.…”

Section: Methodssupporting

confidence: 85%

Effect of precipitating agent NaOH on the preparation of copper oxide nanostructures for electrochemical applications

Balasubramaniam¹,

Balakumar²

2016

Nanosystems: Phys. Chem. Math.

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Copper oxide (CuO) nanostructures with different concentrations of sodium hydroxide for electrochemical applications such as supercapacitors have been synthesized using a simple and low-cost precipitation method. X-ray diffraction pattern confirmed the formation of CuO nanostructures without any impurities and further confirmed its highly crystalline, single phase, monoclinic nature. UV-diffuse reflectance spectral (UV-DRS) studies provided the absorption edge of the material and the estimated band gap value for the nanostructures were calculated using Kubelka-Munk (KM) absorbance plot that are determined to be around 4.74 -4.84 eV. Field emission scanning electron microscopy (FESEM) investigations revealed the morphology of the copper oxide nanocrystals and showed the increment of diameter of the CuO nanostructures. The electrochemical behavior of the CuO nanostructures were investigated using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques which showed the stability, reversibility, symmetric and capacitive nature of the nanostructures.

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Section: Methodssupporting

confidence: 85%

Effect of precipitating agent NaOH on the preparation of copper oxide nanostructures for electrochemical applications

Balasubramaniam¹,

Balakumar²

2016

Nanosystems: Phys. Chem. Math.

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“…In analogy with supported CuO-TiO 2 nanocomposites obtained by a photo deposition route, [ 110 ] the system topography ( Figure 5 d-e) was dominated by the presence of rounded nanofl owers [ 115 ] with a mean lateral size of 400 nm, resulting from the agglomeration of ≈ 50-nm grains. This morphology was responsible for a more homogeneous TiO 2 dispersion in the CuO matrices with respect to Cu 2 O ones.…”

Section: Photocatalytic Hydrogen Productionmentioning

confidence: 83%

Supported Metal Oxide Nanosystems for Hydrogen Photogeneration: Quo Vadis?

Barreca

Carraro

Gombac

et al. 2011

Adv Funct Materials

130

123

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Hydrogen has attracted a great share of attention both as an energy carrier and as an irreplaceble reagent for many industrial processes. Photoactivated routes, ranging from photocatalytic and photo‐electrochemical water splitting to photoreforming of suitable oxygenates, appear to be attractive long‐term solutions among possible strategies for hydrogen production. However, the success of such processes depends on the efficient use of solar energy and on the identification of active and stable catalysts, which, in addition, should be eco‐friendly and available in large amounts at accessible costs. Researchers are exploring the use of supported oxide nanomaterials, which enable an easy catalyst recovery and exhibit unique advantages due to their peculiar nano‐organization. In this Feature Article, the potential of such systems towards photoinduced hydrogen evolution is discussed based on selected case studies that highlight the relations between structure, morphology, composition, and functional performances of oxide nanomaterials. In addition, potential limitations of oxide‐based nanomaterials as well as unexplored key aspects that require special attention in future investigations are discussed.

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“…It can clearly be seen that the resistance contribution caused by the surface charge is less temperature dependent than the bulk resistivity due to the ionisation of acceptors. So it is assumed that the surface states generated by gas adsorption have a position well below the Fermi level at the surface, where their occupation remains unchanged by [4,5] CuO has also been shown to be suitable as sensing material for vapour phase detection at concentrations in the percent v/v range (Fig. 6).…”

Section: Reproducibility and Responsementioning

confidence: 99%

“…hydrogen sulphide, carbon monoxide, nitrogen dioxide or alcohol [1][2][3]. Another application of CuO in the field of sensing is the detection of hydrogen peroxide (H 2 O 2 ) in an amperometric and cyclic voltammetry way [4,5].…”

mentioning

confidence: 99%

Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations

Hennemann

Kohl

Reisert

et al. 2013

Physica Status Solidi (a)

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We present a sensor concept based on copper(II)oxide (CuO) nanofibres for the detection of hydrogen peroxide (H 2 O 2 ) vapour in the percent per volume (% v/v) range. The fibres were produced by using the electrospinning technique. To avoid water condensation in the pores, the fibres were initially modified by an exposure to H 2 S to get an enclosed surface. By a thermal treatment at 350 8C the fibres were oxidised back to CuO. Thereby, the visible pores disappear which was verified by SEM analysis. The fibres show a decrease of resistance with increasing H 2 O 2 concentration which is due to the fact that hydrogen peroxide is an oxidising gas and CuO a p-type semiconductor. The sensor shows a change of resistance within the minute range to the exposure until the maximum concentration of 6.9% v/v H 2 O 2 . At operating temperatures below 450 8C the corresponding sensor response to a concentration of 4.1% v/v increases. The sensor shows a good reproducibility of the signal at different measurements. CuO seems to be a suitable candidate for the detection of H 2 O 2 vapour at high concentrations.Resistance behaviour of the sensor under exposure to H 2 O 2 vapours between 2.3 and 6.9% v/v at an operating temperature of 450 8C.

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Synthesis of CuO nanoflower and its application as a H2O2 sensor

Cited by 68 publications

References 16 publications

Effect of precipitating agent NaOH on the preparation of copper oxide nanostructures for electrochemical applications

Effect of precipitating agent NaOH on the preparation of copper oxide nanostructures for electrochemical applications

Supported Metal Oxide Nanosystems for Hydrogen Photogeneration: Quo Vadis?

Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations

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