Natural pyrite-based electrodes for photoelectrochemical applications

Aricò, A.S.; Ielo, Ileana; Modica, E.; Candiano, Giovanni; Monforte, Giuseppe; Giordano, N.; Antonucci, P.L.

doi:10.1016/0013-4686(93)80018-u

Cited by 4 publications

(2 citation statements)

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“…Up to now, scarce information related with hydrogen evolution ,, and transport in pyrite has been reported. More abundant are the papers dealing with the photoelectrochemical properties of pyrite both natural ,− and synthetic ,,− samples. Photoelectrochemical properties of pyrite thin films − have been also investigated, but reported results are incomplete and dispersed.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS₂)

et al. 2016

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N-Type pyrite (FeS2) thin films, deposited on titanium substrates, have been synthesized and photoelectrochemically characterized. Its flat band potential has been estimated to be −0.75 ± 0.05V vs Ag/AgCl by electrochemical impedance spectroscopy (EIS). The corresponding energy level diagram of the FeS2/electrolyte interface has been established. Profuse hydrogen flows have been produced under visible light illumination of FeS2 photoanode in a photoelectrochemical cell (PEC) at different bias potentials. Their values, measured by mass spectrometry (MS), were higher than 5 μmol H2/min·cm2. Hydrogen photogeneration efficiencies of ∼8% have been reached.

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Section: Introductionmentioning

confidence: 99%

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS₂)

et al. 2016

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“…When processed, pyrite is a raw material for products like sulfur, sulfuric acid, fertilizers, and ferrous sulfates. In addition, due to its interesting physicochemical and electrical characteristics [8], it stands out as an excellent raw material for application in several technological segments, such as for the manufacture of photovoltaic modules [9] and batteries [10,11], as well as in the treatment of effluents [12,13].…”

Section: Introductionmentioning

confidence: 99%

Processing of pyrite derived from coal mining waste by density separation technique using lithium heteropolytungstate (LST)

et al. 2022

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Pyrite (FeS 2 ) is one of the main tailings derived from coal mining. When processed, pyrite has several applications with high value-added, in contrast, if improperly discarded, it causes major environmental impacts, like the acid mine drainage. For those reasons, the seeking for beneficiation techniques of Pyrite has been the target of numerous studies. One of the most employed techniques is the separation by density using heavy liquids, like bromoform, as a separation medium. In the present work, we propose the use of lithium heteropolytungstate (LST), a non-halogenated and non-toxic solution, as an alternative in the separation by density method. For the experiments, raw pyrite samples were collected from the tailings of coal extraction from a mining company in Santa Catarina, Brazil. After the separation process, the samples before and after the beneficiation were characterized by XRD, FTIR, and XRF techniques. The results revealed that the separation technique used in this work led to a significant increase in the concentration of pyrite, going from less than 10% in the raw sample and reaching almost 80% after processing. This impressive result reveals that LST represents a promising alternative for separating pyrite by density techniques, showing much greater effectiveness than other heavy liquids used in the literature, in addition to being environmentally friendly.

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Valorization of waste from coal mining pyrite beneficiation

Ferreira

Müller

Cargnin

et al. 2021

Journal of Environmental Chemical Engineering

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Natural pyrite-based electrodes for photoelectrochemical applications

Cited by 4 publications

References 21 publications

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS₂)

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS₂)

Processing of pyrite derived from coal mining waste by density separation technique using lithium heteropolytungstate (LST)

Valorization of waste from coal mining pyrite beneficiation

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Natural pyrite-based electrodes for photoelectrochemical applications

Cited by 4 publications

References 21 publications

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS2)

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS2)

Processing of pyrite derived from coal mining waste by density separation technique using lithium heteropolytungstate (LST)

Valorization of waste from coal mining pyrite beneficiation

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Product

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Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS₂)

Hydrogen Photoassisted Generation by Visible Light and an Earth Abundant Photocatalyst: Pyrite (FeS₂)