Synthesis of FeS2 (pyrite) nanotube through sulfuration of Fe2O3 nanotube

Shi, Xiaoguo; Tian, Anli; Xue, Xiangxin; Yang, He; Xu, Quan

doi:10.1016/j.matlet.2014.11.084

Cited by 21 publications

(15 citation statements)

References 25 publications

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“…The absorption curve in Fig. 35 As the curves showed, all the samples possessed the typical semiconductor characteristics and could absorb visible light.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…35 Prior to anodization, all iron foils (99.9%, 10 Â 10 Â 0.6 mm) were polished by sandpaper and degreased ultrasonically in alkali liquor, acetone, ethanol, and distilled water consecutively, followed by drying in nitrogen. 35 Prior to anodization, all iron foils (99.9%, 10 Â 10 Â 0.6 mm) were polished by sandpaper and degreased ultrasonically in alkali liquor, acetone, ethanol, and distilled water consecutively, followed by drying in nitrogen.…”

Section: Materials and Fabricationmentioning

confidence: 99%

“…Because of the higher surface area, pyrite nanotube coatings could generate more photoinduced holes at the interface of solutions/solid lms, promote light harvesting, 15,35 and improve the photoelectrochemical properties. However, it is also interesting to note that regardless of MB and phenol, the photocatalytic capacity of pyrite nanotubes coating was enhanced compared with the piled microparticles coating.…”

Section: Mechanism Of the Degradation Under Illuminationmentioning

confidence: 99%

“…15 Additionally, the investigation on the photocatalysis of pyrite lms have suggested that the shape and size regulation could lead to the enhanced optical and photoelectric properties. 35 Herein we report for the rst time on the photocatalytic behaviour of FeS 2 nanotubes coating in degradation of methylene blue (MB) and phenol, the effect of oxidation of pyrite on the photocatalytic process was also investigated. 35 Herein we report for the rst time on the photocatalytic behaviour of FeS 2 nanotubes coating in degradation of methylene blue (MB) and phenol, the effect of oxidation of pyrite on the photocatalytic process was also investigated.…”

Section: Introductionmentioning

confidence: 99%

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Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol

Tian

Shi

et al. 2015

RSC Adv.

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Pyrite crystal is used as a potential catalyst for the degradation of pollutants or removing waste gas in environmental engineering. However, the traditional pyrite synthetic process could lead to intermediate phases during formation of pyrite, such as FeS or Fe 1Àx S, hurting the purity of the products. In this study, pure FeS 2 nanotubes with a stoichiometric ratio were fabricated by vulcanizing the precursor nanotubes.The photocatalytic activity of nanotubes was investigated via decomposing methylene blue and phenol.The results indicated that the oxidation of pyrite affected the photocatalytic activity of pyrite nanotubes slightly. Comparing with the pyrite piled microparticle coating and the hematite nanotube coating, the visible light driven catalytic activity of the pyrite nanotube coating was derived from increased production of hydroxyl radicals. The topography of the nanotube array contributed to the generation of the photoinduced hole + and separation of the e À /hole + pairs, eventually enhanced photocatalysis performance. In addition, Fe 2 O 3 nanotubes can decompose MB effectively, however, hardly degrade phenol. This work offers insight to develop transition metal based semiconductor photocatalysts for environmental and energy utilization.

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“…The absorption curve in Fig. 35 As the curves showed, all the samples possessed the typical semiconductor characteristics and could absorb visible light.…”

Section: Optical Propertiesmentioning

confidence: 99%

Section: Materials and Fabricationmentioning

confidence: 99%

Section: Mechanism Of the Degradation Under Illuminationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol

Tian

Shi

et al. 2015

RSC Adv.

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“…Xia et al [5] utilised a one-step hydrothermal route and successfully obtained FeS 2 nanocrystals with diameters ranging from 10 nm to 35 nm, Zhang et al [6] synthesised bud-like FeS 2 microspheres via a solvothermal method. In addition, pyrite has been synthesised in different shapes, including micro-octahedral [11], nanowires [12], nanocubes [13] and nanotubes [14]. In addition, pyrite has been synthesised in different shapes, including micro-octahedral [11], nanowires [12], nanocubes [13] and nanotubes [14].…”

Section: Introductionmentioning

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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Super‐Mossian Dielectrics for Nanophotonics

Doiron

Khurgin

Naik

2022

Advanced Optical Materials

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Thus, semiconductors with high refractive index and negligible absorption losses in their sub-bandgap region are ideal materials for nanophotonics.Broadly speaking, the sub-bandgap refractive index of semiconductors trades off with its bandgap or absorption edge as shown in Figure 1. Hence at any given wavelength of operation, the maximum refractive index possible appears limited. This trade-off law is popularly known as the Moss rule. The Moss rule, which relates the sub-bandgap refractive index (n) of semiconductors to their bandgaps (E g ), is commonly stated as n 4 • E g ≈ 95 eV. Figure 1a plots the refractive index of common materials versus their bandgap with the Moss rule as a benchmark. While many of the materials do follow the trend predicted by the Moss rule, there are materials that fall significantly outside of this trend. Here, we refer to materials with refractive index appreciably higher than the prediction from the commonly known form of Moss rule as super-Mossian materials.Super-Mossian materials may be easily identified in Figure 1b plotting index versus bandgap but normalized by the Moss rule. There are many materials that outperform Moss rule, some by nearly 40%. Silicon, a popular high index dielectric in nanophotoics, beats the Moss' rule by only 20%. On the other hand, many well-known transition metal dichalcogenides (TMDCs) are super-Mossian in their bulk form and beat the Moss' rule by a wider margin. FeS 2 or iron pyrite is one such an outstanding super-Mossian material with its sub-bandgap refractive index nearly 40% higher than the Moss rule's prediction. Here, we focus on FeS 2 as an example super-Mossian material for high-index nanophotonics. To demonstrate the potential for super-Mossian materials, we grew FeS 2 thin-films and characterized the optical properties to show that the refractive index ranges from 4.2 to 4.4 in the infrared with an optical bandgap of 1.03 eV. Using optical grade FeS 2 , we experimentally demonstrated for the first time an all-dielectric metasurface based on this super-Mossian dielectric material. Searching for Super-Mossian MaterialsA common empirical rule relating the bandgap was first developed by Moss, which found that the bandgap and refractive index are related through n 4 • E g ≈ Constant with a phenomenological constant of 95 eV. [8] An approximate, order-of-magnitude derivation is as follows. We model the relative permittivity of

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Synthesis of FeS2 (pyrite) nanotube through sulfuration of Fe2O3 nanotube

Cited by 21 publications

References 25 publications

Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol

Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol

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

Super‐Mossian Dielectrics for Nanophotonics

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Synthesis of FeS2 (pyrite) nanotube through sulfuration of Fe2O3 nanotube

Cited by 21 publications

References 25 publications

Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol

Pyrite nanotube array films as an efficient photocatalyst for degradation of methylene blue and phenol

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

Super‐Mossian Dielectrics for Nanophotonics

Contact Info

Product

Resources

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