Microwave-assisted controllable synthesis of hierarchical CuS nanospheres displaying fast and efficient photocatalytic activities

Hu, Hanmei; Wang, Jian; Deng, Chonghai; Niu, Cheng; Le, Huirong

doi:10.1007/s10853-018-2669-6

Cited by 20 publications

(12 citation statements)

References 41 publications

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“…It has been reported that CuS nanoparticles are good photocatalysts for the degradation of organic dyes, such as RhB [6,9,20,21,22,23]. Herein, the photocatalytic performance of the as-synthesized CuS nanostructures for the degradation of RhB in the presence of H 2 O 2 under natural light irradiation at ambient temperature was investigated.…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of CuS Nanoparticles from the Interfaces of Hydrophobic Ionic Liquids and Water

Fan

Han

et al. 2019

Molecules

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In this work, a two-phase system composed of hydrophobic ionic liquid (IL) and water phases was introduced to prepare copper sulfide (CuS) nanoparticles. It was found that CuS particles generated from the interfaces of carboxyl-functionalized IL and sodium sulfide (Na2S) aqueous solution were prone to aggregate into nanoplates and those produced from the interfaces of carboxyl-functionalized IL and thioacetamide (TAA) aqueous solution tended to aggregate into nanospheres. Both the CuS nanoplates and nanospheres exhibited a good absorption ability for ultraviolet and visible light. Furthermore, the CuS nanoplates and nanospheres showed highly efficient photocatalytic activity in degrading rhodamine B (RhB). Compared with the reported CuS nanostructures, the CuS nanoparticles prepared in this work could degrade RhB under natural sunlight irradiation. Finally, the production of CuS from the interfaces of hydrophobic IL and water phases had the advantages of mild reaction conditions and ease of operation.

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Section: Resultsmentioning

confidence: 99%

Facile Preparation of CuS Nanoparticles from the Interfaces of Hydrophobic Ionic Liquids and Water

Fan

Han

et al. 2019

Molecules

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“…The optical band gap energy (E g ) may be got from intercepts of the tangent of the plot of (αhν) 2 vs hν with the abscissa axis. 9 The mono dispersed CuS nanocrystals exhibited energy gap ~1.5 eV. 11 Thus, the samples exhibited a blue shift due to the internal stress induced by the crystal structural defects.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…33 Hu et al found the energy gap of CuS with hierarchical mesoporous solid spheres has an energy gap ~1.48 eV while the energy gap of CuS with hollow spheres is ~1.63 eV, respectively. 9 The mono dispersed CuS nanocrystals exhibited energy gap ~1.5 eV. 23 Palve et al 11 changed the ratio of Cu:S from 1:1 to 1:5 in preparation of CuS, and they found that the energy gap increased as the amount of sulfur increased in the sample.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…Nano CuS flower-like sub-micro spheres 5 have two strong absorption peaks different from those obtained in CuS nanoflakes, 6 nanowires, 7 and hollow spheres. 9 Moreover, Fu et al 10 demonstrated that the sulfur source determined the reaction kinetics which played a critical role in defining the final morphology and size of CuS nanocrystals. 9 Moreover, Fu et al 10 demonstrated that the sulfur source determined the reaction kinetics which played a critical role in defining the final morphology and size of CuS nanocrystals.…”

Section: Introductionmentioning

confidence: 99%

“…8 It was found that the energy gap of CuS mesoporous hollow spheres is larger than the same composition with different morphology. 9 Moreover, Fu et al 10 demonstrated that the sulfur source determined the reaction kinetics which played a critical role in defining the final morphology and size of CuS nanocrystals. Additionally, changing the copper to sulfur ratio used in the preparation of CuS affects its properties, for example, the energy gap of CuS is enhanced from 2.18 to 2.32 eV as Cu:S ratio was changed from 1:1 to 1:2.…”

Section: Introductionmentioning

confidence: 99%

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Role of Cu/S ratio and Mg doping on modification of structural and optical characteristics of nano CuS

Mohamed

Abdel-Kader

Almarashi

2019

Int J Applied Ceramic Tech

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Nano CuS with different Cu to S ratio and also Mg‐doped nano CuS are prepared using a thermolysis procedure under nitrogen flows. The effect of changing copper to sulfur ratio in preparation of CuS under flowing nitrogen and also Mg‐doped CuS on the lattice parameters and crystallite size is studied using X‐ray diffraction data by applying the Rietveld profile method. Scanning electron microscope mapping is used to verify the distribution of different elements over undoped and doped CuS samples. Fourier transforms infrared spectroscopy spectra confirm that the structure of CuS is not altered by doping or changing of the Cu to S ratio. In order to examine the effect of changes of Cu to S or Mg doping on the absorption behavior of nano CuS, ultraviolet spectroscopy is used. The energy gaps of different samples are determined using Tauc’s relation. The photoluminescence spectroscopy reveals that all samples exhibit violet and blue sub‐emissions except a CuS with Cu:S ratio 1:4 which also emits green sub‐emission.

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Morphology‐Controlled Synthesis of a Novel Cu−Zn−S−O Nanocomposite for Pollutant Removal by Synergistic Effect of Adsorption and Photocatalysis

Zhu

Yang

et al. 2022

ChemistrySelect

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The novel Cu−Zn−S−O nanocomposites have been successfully synthesized via a green microwave technique using preprepared ZnS and CuO nanoparticles. The Cu−Zn−S−O nanocomposites were highly sensitive to visible light. Meanwhile, Cu−Zn−S−O nanocomposites showed excellent adsorption capacity towards dye pollutants. Under the synergistic effect of adsorption and photocatalysis, various types of dye pollutants could be removed more quickly and efficiently by Cu−Zn−S−O (M=2) nanocomposite than pure CuO and ZnS nanoparticles. Furthermore, due to morphology‐controlled CuO, Cu−Zn−S−O nanocomposites were also different in the morphology and photoresponse, and even in the removal performance. The photodegradation mechanism investigation indicated that different types of dyes were mediated by different decisive reactive species. Additionally, Cu−Zn−S−O nanocomposites could be easily reused with higher activity.

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Microwave-assisted controllable synthesis of hierarchical CuS nanospheres displaying fast and efficient photocatalytic activities

Cited by 20 publications

References 41 publications

Facile Preparation of CuS Nanoparticles from the Interfaces of Hydrophobic Ionic Liquids and Water

Facile Preparation of CuS Nanoparticles from the Interfaces of Hydrophobic Ionic Liquids and Water

Role of Cu/S ratio and Mg doping on modification of structural and optical characteristics of nano CuS

Morphology‐Controlled Synthesis of a Novel Cu−Zn−S−O Nanocomposite for Pollutant Removal by Synergistic Effect of Adsorption and Photocatalysis

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