Catalyst-free fabrication of novel ZnO/CuO core-Shell nanowires heterojunction: Controlled growth, structural and optoelectronic properties

Khan, Muhammad Arif; Wahab, Yussof; Muhammad, Rosnita; Tahir, Muhammad Nawaz; Sakrani, Samsudi

doi:10.1016/j.apsusc.2017.11.071

Cited by 42 publications

(16 citation statements)

References 50 publications

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“…The CuO nanoparticles exhibit a high degree of crystallization. The average spacing of lattice stripes shown in Figure is 0.23 nm, which is line with the displacement of crystal face (1 1 1) in the monoclinic CuO (Joint Committee on Powder Diffraction Standards: 74‐1021) phase [Figure (b)] …”

Section: Resultssupporting

confidence: 65%

In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

Cao

Shi

Yan

et al. 2019

J of Applied Polymer Sci

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Polymer nanocomposites present remarkably enhanced mechanical and tribological properties with respect to their matrices even at a low loading of nanofillers. Here, cupric oxide (CuO) nanoparticles (nano-CuO) were in situ filled into ultra-high-molecularweight polyethylene (UHMWPE) to inhibit a possible agglomeration encountered in the preparation by mechanical mixing. The filled CuO nanoparticles were highly dispersed in UHMWPE with a reliable interface combination. The CuO nanoparticles in the matrix play a role for heterogeneous nucleation, resulting in an enhancement in degree of crystallinity of UHMWPE. The elastic modulus and the elongation at break of the nanocomposites also presented an improvement, indicating a good compatibility between the nano-CuO and the matrix. The average sliding friction coefficient of UHMWPE against 45 # steel was reduced by up to 34% after the in situ filling of CuO nanoparticles, and the wear mechanism was found to transform from adhesive to fatigue wear after the introduction of nano-CuO. It is concluded that the in situ filling can improve the dispersion of CuO nanoparticles in UHMWPE, and markedly promote the mechanical properties and tribological performance of UHMWPE.

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Section: Resultssupporting

confidence: 65%

In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

Cao

Shi

Yan

et al. 2019

J of Applied Polymer Sci

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“…Copper oxide (CuO) has been considered to be one of the best semiconductor metal oxides as a result of its important chemical and physical properties such as large surface area, excellent solar light absorbance, and a narrow band gap (1.2 eV) [ 8 , 9 , 10 , 11 ]. CuO materials have a monoclinic structure and numerous attractive aspects, such as high stability, super thermal conductivity, photovoltaic properties, and antimicrobial activity.…”

Section: Introductionmentioning

confidence: 99%

Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties

et al. 2020

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In the present work, a facile one-step hydrothermal synthesis of well-defined stabilized CuO nanopetals and its surface study by advanced nanocharacterization techniques for enhanced optical and catalytic properties has been investigated. Characterization by Transmission electron microscopy (TEM) analysis confirmed existence of high crystalline CuO nanopetals with average length and diameter of 1611.96 nm and 650.50 nm, respectively. The nanopetals are monodispersed with a large surface area, controlled morphology, and demonstrate the nanocrystalline nature with a monoclinic structure. The phase purity of the as-synthesized sample was confirmed by Raman spectroscopy and X-ray diffraction (XRD) patterns. A significantly wide absorption up to 800 nm and increased band gap were observed in CuO nanopetals. The valance band (VB) and conduction band (CB) positions at CuO surface are measured to be of +0.7 and −1.03 eV, respectively, using X-ray photoelectron spectroscopy (XPS), which would be very promising for efficient catalytic properties. Furthermore, the obtained CuO nanopetals in the presence of hydrogen peroxide ( H 2 O 2 ) achieved excellent catalytic activities for degradation of methylene blue (MB) under dark, with degradation rate > 99% after 90 min, which is significantly higher than reported in the literature. The enhanced catalytic activity was referred to the controlled morphology of monodispersed CuO nanopetals, co-operative role of H 2 O 2 and energy band structure. This work contributes to a new approach for extensive application opportunities in environmental improvement.

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“…ZnO cores with different types of morphologies, i.e. nanorods 34,37,38 , nanopillars 39 , nanowires 35,40,41 and nanospheres 42 were synthesized by aqueous chemical growth 40 , hydrothermal synthesis 41 and chemical vapour deposition 35 . Further these were covered with CuO shells obtained by combining various techniques: electrodeposition with thermal oxidation in an oxygen atmosphere 40 , electrophoresis with electroless deposition 41 and sputtering with thermal oxidation in oxygen atmosphere inside the chemical vapour deposition tube furnace 35 .…”

Section: Introductionmentioning

confidence: 99%

Radial heterojunction based on single ZnO-CuxO core-shell nanowire for photodetector applications

Costas

Florica

Preda

et al. 2019

Sci Rep

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ZnO-Cu x O core-shell radial heterojunction nanowire arrays were fabricated by a straightforward approach which combine two simple, cost effective and large-scale preparation methods: (i) thermal oxidation in air of a zinc foil for obtaining ZnO nanowire arrays and (ii) radio frequency magnetron sputtering for covering the surface of the ZnO nanowires with a Cu x O thin film. The structural, compositional, morphological and optical properties of the high aspect ratio ZnO-Cu x O core-shell nanowire arrays were investigated. Individual ZnO-Cu x O core-shell nanowires were contacted with Pt electrodes by means of electron beam lithography technique, diode behaviour being demonstrated. Further it was found that these n-p radial heterojunction diodes based on single ZnO-Cu x O nanowires exhibit a change in the current under UV light illumination and therefore behaving as photodetectors.

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Catalyst-free fabrication of novel ZnO/CuO core-Shell nanowires heterojunction: Controlled growth, structural and optoelectronic properties

Cited by 42 publications

References 50 publications

In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

In situ fabrication of CuO/UHMWPE nanocomposites and their tribological performance

Surface Study of CuO Nanopetals by Advanced Nanocharacterization Techniques with Enhanced Optical and Catalytic Properties

Radial heterojunction based on single ZnO-CuxO core-shell nanowire for photodetector applications

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