Controlled colloidal synthesis of iron pyrite FeS<sub>2</sub>nanorods and quasi-cubic nanocrystal agglomerates

Zhu, Leize; Richardson, Beau J.; Yu, Qiuming

doi:10.1039/c3nr04979e

Cited by 33 publications

(28 citation statements)

References 44 publications

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“…The weakest peak at 427 cm −1 is generated from coupled libration of stretching and libration of four adjacent S-S units. The peak value in two Raman spectra of polyhedrons and cubes almost coincided with the reported literatures [4,41]. The peaks of pure phase pyrite FeS 2 were provided and no other peaks of additional phases or impurities could be observed, revealing the high phase purity of the products in accordance with the XRD patterns.…”

Section: Characterisation and Optical Property Of Pyrite Fes 2 Nanocusupporting

confidence: 90%

“…Fig. 5a shows the Raman spectrum of pyrite FeS 2 nanopolyhedrons and nanocube peaks at 342, 376, and 427 cm −1 , which respectively match well with the reported values for Eg, Ag, and Tg modes of FeS 2 pyrite [4,41]. The most prominent and high peak at 376 cm −1 was caused by the librations of S atoms with stationary iron, which obtained the high resolution peak of S-S unit.…”

Section: Characterisation and Optical Property Of Pyrite Fes 2 Nanocusupporting

confidence: 86%

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An efficient precursor to synthesize various FeS₂nanostructures via a simple hydrothermal synthesis method

et al. 2016

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Non-toxic and earth-abundant pyrite (FeS 2 ) is a promising photoelectric material for solar energy conversion and storage. In this study, an efficient FeS precursor was employed to synthesise successfully various shapes of pyrite FeS 2 , such as nanopolyhedra, nanocubes, nanooctahedra, and irregular nanocrystals via a simple hydrothermal method by adjusting the reaction conditions. Pyrite FeS 2 nanopolyhedra and nanocubes were synthesised using the FeS precursor as the single iron source and thiourea (NH 2 CSNH 2 ) as the sulphur source at various reaction temperatures. Nanooctahedra and irregular nanocrystals were obtained using sodium thiosulfate pentahydrate (Na 2 S 2 O 3 •5H 2 O) and sulphur powder as sulphur sources. The effects of polyvinylpyrrolidone content and the molar ratio of the FeS precursor to NH 2 CSNH 2 on the formation of cubic shaped pyrite FeS 2 were investigated. The products were characterised by X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, transmission electron spectroscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible and Raman spectroscopy. The proposed facile hydrothermal method used an efficient FeS precursor as the iron source, which can be easily controlled to produce high-purity pyrite FeS 2 with desirable optical absorption properties.

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Section: Characterisation and Optical Property Of Pyrite Fes 2 Nanocusupporting

confidence: 90%

Section: Characterisation and Optical Property Of Pyrite Fes 2 Nanocusupporting

confidence: 86%

An efficient precursor to synthesize various FeS₂nanostructures via a simple hydrothermal synthesis method

et al. 2016

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“…3c. The collision, attachment and rearrangement of particles lead to generation of surface defects which can be responsible for larger band gap [2,29]. Here the defects are mitigated with time due to the efficient rearrangement which is evident from the XRD.…”

Section: Morphological Studiesmentioning

confidence: 96%

Low temperature synthesis of iron pyrite nanorods for photovoltaic applications

Jayalakshmi

Bhat

2015

J Mater Sci: Mater Electron

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Iron pyrite is gaining reputation amongst the various alternatives for silicon as the photovoltaic material in solar cells due to its low cost, strong absorption and relatively high abundance of its constitutional elements. The synthesis of iron pyrite nanoparticles by existing hydrothermal methods with precise control over size, shape and stoichiometry is a difficult task due to the difficulty in controlling the parameters at a higher temperature. Here, we report a novel synthesis method for obtaining iron pyrite nanorods through a low temperature process in a stirred container which is scalable for the large scale industrial production. The nanorods synthesized by the new method consisted of single phase pyrite, possessing an optical band gap of about 1.13 eV. The overall mechanism of nanorod formation is explained by the La Mer model as well as the oriented attachment model.

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“…This result might be attributed to the effects of the size, shape, crystallization and uniformity of the products on their absorption performance [10,[45][46][47][48][49]. The products of the solvothermal method increased in absorbance with reaction time, but this absorbance remained lower than that of the products obtained using the microwave-assisted method.…”

Section: Formation Of Pyrite Fes 2 Microspheresmentioning

confidence: 99%

Microwave-assisted synthesis of pyrite FeS₂ microspheres with strong absorption performance

Liang

Bai

et al. 2015

RSC Adv.

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Pyrite FeS 2 microspheres with an average size of approximately 1.1 µm were successfully synthesised in high yield via a facile and efficient microwave-assisted method. X-ray diffraction patterns and high-resolution transmission electron micrographs showed that the microspheres had pure single crystalline phase. Scanning electron micrographs and transmission electron micrographs illustrated that the microspheres were uniform and well-distributed. The absorption spectra of the as-obtained microspheres showed that pyrite exhibited high absorbance in the visible region. The surfactants influenced the phase, morphology and absorption property of the products. Long reaction time allowed the formation of uniform pyrite FeS 2 microspheres with smooth surfaces. The microwave-assisted method yielded products with better morphology and absorption property than the high-pressure solvothermal method.

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Controlled colloidal synthesis of iron pyrite FeS₂nanorods and quasi-cubic nanocrystal agglomerates

Cited by 33 publications

References 44 publications

An efficient precursor to synthesize various FeS₂nanostructures via a simple hydrothermal synthesis method

An efficient precursor to synthesize various FeS₂nanostructures via a simple hydrothermal synthesis method

Low temperature synthesis of iron pyrite nanorods for photovoltaic applications

Microwave-assisted synthesis of pyrite FeS₂ microspheres with strong absorption performance

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Controlled colloidal synthesis of iron pyrite FeS2nanorods and quasi-cubic nanocrystal agglomerates

Cited by 33 publications

References 44 publications

An efficient precursor to synthesize various FeS2nanostructures via a simple hydrothermal synthesis method

An efficient precursor to synthesize various FeS2nanostructures via a simple hydrothermal synthesis method

Low temperature synthesis of iron pyrite nanorods for photovoltaic applications

Microwave-assisted synthesis of pyrite FeS2 microspheres with strong absorption performance

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Product

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Controlled colloidal synthesis of iron pyrite FeS₂nanorods and quasi-cubic nanocrystal agglomerates

An efficient precursor to synthesize various FeS₂nanostructures via a simple hydrothermal synthesis method

An efficient precursor to synthesize various FeS₂nanostructures via a simple hydrothermal synthesis method

Microwave-assisted synthesis of pyrite FeS₂ microspheres with strong absorption performance