Fabrication of diverse CuO nanostructures via hydrothermal method and their photocatalytic properties

Wang, Yongqian; Wang, Dagui; Yan, Bing; Chen, Yan; Song, Caixiong

doi:10.1007/s10854-016-4645-8

Cited by 27 publications

(11 citation statements)

References 35 publications

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“…The crystallite sizes of pure and Ce‐doped CuO structures are determined from the full width at half‐maximum diffraction peak according to Debye–Scherrer equation as given below

D = \frac{K λ}{β \cos θ}

where D is the crystalline size (nm), K is the geometric factor (where K = 0.89), λ is the wavelength of X‐ray radiation (where Cu Kα = 0.154 nm), β is the angular width of peaks at full width at half maximum (FWHM), and θ is the Bragg's angle.…”

Section: Resultsmentioning

confidence: 99%

“…The band‐gap of pure and Ce‐doped CuO NSs is derived by the equation shown below

{((), α h ν)}^{n} = B false(h ν - E_{g} false)

where α is the absorption coefficient, hν is the energy of incident photon, E g represents the band‐gap of semiconductor, B is constant, and n is 2 for direct transition semiconductor or 1/2 for an indirect transition semiconductor.…”

Section: Resultsmentioning

confidence: 99%

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Effect of Doping Ce Ions on Morphology and Photocatalytic Activity of CuO Nanostructures

Chen

Tan

et al. 2019

Crystal Research and Technology

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By one-step hydrothermal method, pure and Ce-doped CuO nanostructures (NSs) are successfully synthesized. In this work, C 4 H 6 CuO 4 ·H 2 O and Ce(NO 3 ) 3 ·6H 2 O are used as the precursor and the dopant. The results of X-ray diffraction and energy dispersive spectroscopy demonstrate that small portions of Ce ions are incorporated into the crystal lattice of CuO NSs and substitute Cu ions with the formation of a tiny impurity (Cu 2 O). Field emission scanning electron microscopy images display that the nanoellipsoid morphology of pure CuO transforms to an apparently rough surface with larger sizes of the morphology by doping with Ce element. Compared to pure CuO NSs, the UV-vis absorption of Ce-doped CuO NSs is remarkably enhanced, which exhibits a strong ability of light absorption both in the 200-380 nm and in the visible region (380-800 nm). The measured band-gaps of pure and Ce-doped CuO NSs with different amounts of Ce ions are 2.07 and 1.93, 2.03, 2.02 eV, respectively. The photocatalytic test shows that the photocatalytic activity of Ce-doped CuO NSs is eminently better than for pure CuO NSs, with the photodegradation of methylene blue solution rising up to 90.04%.

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“…The crystallite sizes of pure and Ce‐doped CuO structures are determined from the full width at half‐maximum diffraction peak according to Debye–Scherrer equation as given below

D = \frac{K λ}{β \cos θ}

Section: Resultsmentioning

confidence: 99%

“…The band‐gap of pure and Ce‐doped CuO NSs is derived by the equation shown below

{((), α h ν)}^{n} = B false(h ν - E_{g} false)

Section: Resultsmentioning

confidence: 99%

Effect of Doping Ce Ions on Morphology and Photocatalytic Activity of CuO Nanostructures

Chen

Tan

et al. 2019

Crystal Research and Technology

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“…Nanoscale materials have shown different and improved properties. For example, CuO NPs are more catalytically active than the same compound in bulk (Wang, Wang, Yan, Chen, & Song, 2016). According to the shape, size and composition of the copper oxide nanoparticles, they could present several practical properties (Kumar, Smita, Cumbal, Debut, & Angulo, 2017).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Ag, Cu and Zn nanoparticles obtained using Aloe vera extract and gamma ionizing radiation

Vieyra¹,

Olguín²,

Segura³

et al. 2020

JART

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The characteristics of the nanoparticles of silver, copper and zinc obtained from two synthetic routes were investigated. A possible future application of these nanoparticles is as bactericidal agents. The reduction methods were Aloe vera extract and gamma ray irradiation with a dose rate of 0.756 kGy/h and a total dose of 40 kGy from a 60Co-source. The chemical species of the nanoparticles (NPs) obtained by Aloe vera extract were Ag, CuO, and ZnO; while the NPs obtained using gamma irradiation were Ag and Cu2O. The precursor to obtaining the nanoparticles and the route of synthesis define the purity, morphology, crystallinity, and chemical speciation of the metal.

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“…Cu 2 O is a direct gap semiconductor with optical bandgap of 2.1–2.6 eV, while CuO is an indirect gap semiconductor with lower bandgap energy of 1.2–1.6 eV. The lower bandgap energy makes CuO a suitable candidate for application in photocatalytic processes under visible light …”

Section: Introductionmentioning

confidence: 99%

Pd‐Decorated CuO Thin Film for Photodegradation of Acetaminophen and Triclosan under Visible Light Irradiation

Katal

Masudy‐Panah

Saeedikhani

et al. 2018

Adv Materials Inter

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Inefficient visible light photocatalytic degradation of organic pollutants, such as acetaminophen (ACE) and triclosan (TS), is one of the main limiting factors for implementing cost‐effective metal oxide photocatalyst for large‐scale deployment. Here, a highly efficient CuO thin film photocatalyst is developed through rapid thermal annealing. The CuO thin film is decorated with Pd nanostructures for enhanced visible light degradation of ACE and TS. It is shown that compared to the as‐deposited thin CuO film photocatalyst, the rapid thermal assisted CuO photocatalyst can significantly enhance charge generation and separation efficiency through improvement of crystallinity and reduction of recombination centres. Furthermore, it is demonstrated that the incorporation of Pd nanostructures can considerably increase optical absorption, which further improve the photocatalytic performance through the enhancement of surface plasmon resonance. The CuO film with the 40 s of Pd sputtering (Pd40–CuO) shows the highest performance for photocatalytic degradation of both ACE and TS. The Pd40–CuO film shows good stability and does not show any considerable reduction in photocatalytic activity after five cycles. This indicates the high potential of Pd40–CuO for water and wastewater treatment on industrial scale.

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Fabrication of diverse CuO nanostructures via hydrothermal method and their photocatalytic properties

Cited by 27 publications

References 35 publications

Effect of Doping Ce Ions on Morphology and Photocatalytic Activity of CuO Nanostructures

Effect of Doping Ce Ions on Morphology and Photocatalytic Activity of CuO Nanostructures

Comparison of Ag, Cu and Zn nanoparticles obtained using Aloe vera extract and gamma ionizing radiation

Pd‐Decorated CuO Thin Film for Photodegradation of Acetaminophen and Triclosan under Visible Light Irradiation

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