Chemical synthesis, structural, optical, magnetic characteristics and enhanced visible light active photocatalysis of Ni doped CuS nanoparticles

Subramanyam, K.; Sreelekha, N.; Reddy, D. Amaranatha; Murali, G.; Varma, Keisha; Vijayalakshmi, R.P.

doi:10.1016/j.solidstatesciences.2017.01.008

Cited by 74 publications

(24 citation statements)

References 52 publications

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“…22 To control the design of materials, efforts have been made through methodologies such as coprecipitation, solvothermal synthesis, hydrothermal synthesis, and hot injection. 23,24 The hierarchical self-assembled structures enhance the performance of materials through micro- or nano-sized building blocks. 25 Therefore, the investigation of hierarchical semiconductor microarchitectures built from nano building blocks is of utmost significance for both scientific and industrial applications.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Design of CuS Architectures for Visible Light Photocatalysis of 4-Chlorophenol

2017

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Hydrothermal-assisted CuS hierarchical architectures were grown in the presence of anionic sulfur sources, and the investigation of their degradation efficiency for a pesticide 4-chlorophenol (4-CP) under visible light irradiation was carried out. The dissociation of S 2– from the sulfur compound governs the nucleation of CuS followed by a specific pattern of growth to produce different morphologies. The self-assembled covellite spherical CuS flower architecture assembles in the presence of thiourea and exhibits the highest photodegradation activity. The open architecture of ∼2.3 μm spherical CuS flowers consisting of a ∼100 nm thick sheet encompasses a comparatively high surface area and particle growth along the (110) plane that facilitates more active sites for catalytic activity enhancement. The catalyst loading for 4-CP degradation has been optimized, and a detailed trapping mechanism has been explored.

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Section: Introductionmentioning

confidence: 99%

Hierarchical Design of CuS Architectures for Visible Light Photocatalysis of 4-Chlorophenol

2017

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“…20 Furthermore, the band gap energy of Mg-doped Sn 2 S 3 thin films exhibited a blue shift from 1.94 to 2.09 eV with the increase in Mg concentration (up to 3%) due to the Burstein-Moss (BM) effect 24 which is inconsistent with our case. 12 CuS prepared as monodispersion in an oleic acid/paraffin system exhibited six emission peaks, partly in the blue region and partly in the green region. The broad PL emissions peaks can be decomposed into sub-emission peaks using Gaussian fitting as shown in Figure 6.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…37 While CuS nanoparticles synthesized by wet chemical co-precipitation route via EDTA molecules as templates emitted PL spectra in a blue region. 12 CuS prepared as monodispersion in an oleic acid/paraffin system exhibited six emission peaks, partly in the blue region and partly in the green region. 23 Moreover, Li et al 23 changed Cu to S ratio amount, and they found that all CuS samples regardless of Cu to S ratio have similar PL peaks.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…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. 12 Conversely, the energy gap of CuS prepared by a hydrothermal method using CTAB increased from 2.64 to 4.51 eV when doped with Ni. 11 The energy gap of CuS prepared by wet chemical co-precipitation method became narrower as it doped with either Ni, Fe, Co, or Mn.…”

Section: Introductionmentioning

confidence: 98%

“…11 The energy gap of CuS prepared by wet chemical co-precipitation method became narrower as it doped with either Ni, Fe, Co, or Mn. 12 Conversely, the energy gap of CuS prepared by a hydrothermal method using CTAB increased from 2.64 to 4.51 eV when doped with Ni. 13 In our previous study, we examined the effect of Mn and Fe on optical properties of CuS prepared by thermolysis procedure in air.…”

Section: Introductionmentioning

confidence: 98%

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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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Electronic Properties of Transition and Alkaline Earth Metal Doped CuS: A DFT Study

Oppong‐Antwi,

Huang,

Hart

2023

ChemPhysChem

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CuS is a unique semiconductor with potential in optoelectronics. Its unusual electronic structure, including a partially occupied valence band, and complex crystal structure with an S−S bond offer unique opportunities and potential applications. In this work, the use of doping to optimize the properties of CuS for various applications is investigated by density functional theory (DFT) calculations. Among the dopants studied, Ni, Zn, and Mg may be the most practical due to their lower formation energies. Doping with Fe, Ni, or Ca induces significant distortion, which may be beneficial for achieving materials with high surface areas and active states. Significantly, doping alters the conductor‐like behavior of CuS, opening a band gap by increasing bond ionicity and reducing the S−S bond covalency. Thus, doping CuS can tune the plasmonic properties and transform it from a conductor to an intrinsic fluorescent semiconductor. Ni and Fe doping give the lowest band gaps (0.35 eV and 0.39 eV, respectively), while Mg doping gives the highest (0.86 eV). Doping with Mg, Ca, and Zn may enhance electron mobility and charge separation. Most dopants increase the anisotropy of electron‐to‐hole mass ratios, enabling device design that exploits directional‐dependence for improved performance.

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Chemical synthesis, structural, optical, magnetic characteristics and enhanced visible light active photocatalysis of Ni doped CuS nanoparticles

Cited by 74 publications

References 52 publications

Hierarchical Design of CuS Architectures for Visible Light Photocatalysis of 4-Chlorophenol

Hierarchical Design of CuS Architectures for Visible Light Photocatalysis of 4-Chlorophenol

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

Electronic Properties of Transition and Alkaline Earth Metal Doped CuS: A DFT Study

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