Raman, Far Infrared, and Mössbauer Spectroscopy of CuFeS<sub>2</sub> Nanocrystallites

Wang, Chunrui; Xue, Shaolin; Hu, Junqing; Tang, Kaibin

doi:10.1143/jjap.48.023003

Cited by 17 publications

(12 citation statements)

References 34 publications

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“…S5b † conrmed the chalcopyrite structure, and it exhibited three peaks at 286, 351 and 469 cm À1 , corresponding to the two pairs of S 2À vibrating mode (A 1 ) and vibrational modes associated with S 2À , Cu + and Fe 3+ (B 2 and E), respectively. 17 The phase detection of the as-synthesized products was determined by powder XRD (PXRD). Peak positions in FeS 2 nanoplates PXRD (Fig.…”

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confidence: 99%

Electrical and magnetic properties of FeS₂ and CuFeS₂ nanoplates

Huang

Zhong

et al. 2015

RSC Adv.

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confidence: 99%

Electrical and magnetic properties of FeS₂ and CuFeS₂ nanoplates

Huang

Zhong

et al. 2015

RSC Adv.

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“…These materials can be used as solar cells, coherent and incoherent sources of polarized radiation, in photovoltaic, thermoelectric and spintronic devices [1][2][3][4][5][6][7]. Thin films [8], nanowires and spherical particles [9,10], and nanocrystals [11][12][13] were synthesized. The crystal structure of CuFeS2 is tetragonal with parameters a = 5.29 Å and c = 10.41 Å [14][15][16][17], space group I42d [18].…”

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confidence: 99%

The distribution of the electron density and spin density in the interplanar areas CuFeS₂by NMR^63,65Cu in a local field

et al. 2021

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Chalcopyrite CuFeS2 is a known semiconductor mineral with a wide range of unique physical and chemical properties. These materials can be used as elements of solar batteries, coherent and incoherent sources of polarized radiation, in photovoltaic, thermoelectric and spintronic devices. Despite the relatively large number of studies on CuFeS2, many questions about its magnetic and electronic properties, are still outstanding. In this paper we were carried out studies of the distribution of the electron density and spin density in the nuclei of iron and copper in the semiconductor mineral CuFeS2. Special attention was devoted to interrelation of electronic and spin subsystems of the compound. The results of studies of the compound obtained in NMR 63,65Cu local field at low temperatures were used to perform the corresponding analysis. The cluster approach was used. The biggest cluster had Cu9Fe10S28-4 formula. Calculations were carried out in the framework of restricted self-consistent Hartree - Fock with open shells (SCF-LCAO-ROHF), MINI basis. The calculations were made with the “foundation” on the quadrupole parameters (quadrupole νQ frequency and the asymmetry parameter of the electric field gradient tensor η), obtained from the experiment. Study of electron density maps were performed for the regions containing chains of Fe-S-Cu and S-Fe-S for the different layers of metals and sulfur atoms. It is shown that the nature of the connection of iron atoms belonging to neighboring layers with sulfur atoms of the intermediate layer is different, which is reflected on the electron density distribution.

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“…23,24 Wang et al 25 and Liang et al 26 independently developed prominent colloidal methods to synthesize CuFeS 2 nanocrystals. Various types of nanostructures of CuFeS 2 , including thin films, 27 (nanowires, nanorods, and spherical particles) 16,17 and nanocrystals 25,26,28 have been synthesized for probable applications in photovoltaics, 29 thermoelectric 26 and spintronic devices, and as catalysts for dye degradation. 30 One of the biggest challenges and concerns in front of researchers is to make the environment pollutant-free.…”

Section: Introductionmentioning

confidence: 99%

“…These materials were optically transparent, and their properties were closely matching that of the bulk material. , Wang et al and Liang et al independently developed prominent colloidal methods to synthesize CuFeS 2 nanocrystals. Various types of nanostructures of CuFeS 2 , including thin films, (nanowires, nanorods, and spherical particles) , and nanocrystals ,, have been synthesized for probable applications in photovoltaics, thermoelectric and spintronic devices, and as catalysts for dye degradation …”

Section: Introductionmentioning

confidence: 99%

Chalcopyrite with Magnetic and Dielectric Properties: An Introductory Catalyst for 4-Nitrophenol Reduction

et al. 2020

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The progress for the development of active, stable, and economic catalysts for the chemical transformation of noxious chemicals to benign is of primary importance. The synthesis of surfactant-free chalcopyrite, sf-CuFeS2 , by a wet-chemical one-pot hexamethyldisilazane-assisted synthetic method was accomplished. Various analytical and spectroscopic techniques were used for the physical characterization of the material produced. From the observation of magnetic properties, the material chalcopyrite was found to be paramagnetic. The dielectric constant and dielectric loss were also determined and were found to be decreasing with an increase in frequency. The dielectric behavior of the material was explained by the Maxwell–Wagner theory of polarization, and the dielectric constant of the as-synthesized sample was found to be 3.176 at 100 °C and 500 kHz. The potential catalytic activity was confirmed by performing the reduction of 4-nitrophenol (4-NP) to 4-amino phenol (4-AP) in the presence of sodium borohydride (NaBH4) in aqueous medium at room temperature. The catalyst showed about 90% yield in the reduction reactions, which can be attributed to easy access to active sites invigorated by the absence of surfactant molecules. The reusability of the catalyst was checked to find out the stability, and excellent retention of activity up to five cycles was observed.

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Raman, Far Infrared, and Mössbauer Spectroscopy of CuFeS₂ Nanocrystallites

Cited by 17 publications

References 34 publications

Electrical and magnetic properties of FeS₂ and CuFeS₂ nanoplates

Electrical and magnetic properties of FeS₂ and CuFeS₂ nanoplates

The distribution of the electron density and spin density in the interplanar areas CuFeS₂by NMR^63,65Cu in a local field

Chalcopyrite with Magnetic and Dielectric Properties: An Introductory Catalyst for 4-Nitrophenol Reduction

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Raman, Far Infrared, and Mössbauer Spectroscopy of CuFeS2 Nanocrystallites

Cited by 17 publications

References 34 publications

Electrical and magnetic properties of FeS2 and CuFeS2 nanoplates

Electrical and magnetic properties of FeS2 and CuFeS2 nanoplates

The distribution of the electron density and spin density in the interplanar areas CuFeS2by NMR63,65Cu in a local field

Chalcopyrite with Magnetic and Dielectric Properties: An Introductory Catalyst for 4-Nitrophenol Reduction

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Product

Resources

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Raman, Far Infrared, and Mössbauer Spectroscopy of CuFeS₂ Nanocrystallites

Electrical and magnetic properties of FeS₂ and CuFeS₂ nanoplates

Electrical and magnetic properties of FeS₂ and CuFeS₂ nanoplates

The distribution of the electron density and spin density in the interplanar areas CuFeS₂by NMR^63,65Cu in a local field