Photochemical treatment of As(III) with α-Fe2O3 synthesized from Jarosite Waste

Wang, Jixin; Yuan, Rusheng; Xie, Liyan; Tian, Qinfen; Zhu, Shengli; Hu, Yanhua; Liu, Ping; Shi, Xicheng; Wang, Donghui

doi:10.1039/c1ra00436k

Cited by 12 publications

(2 citation statements)

References 44 publications

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“…Among these phases, hematite is a thermodynamically stable polymorph of Fe 2 O 3 , and a well-known ferromagnet that undergoes magnetic phase transitions from paramagnetic to weak-ferromagnetic state at the Neel temper ature (T N ) of 961 K, and from weakferromagn etic to anti-ferromagnetic state at Morin transition temperature (T M ) of 265 K [28,29]. In addition, it has optimal band gap for light absorption applications [30], and has been widely investigated for several other technological applications such as gas sensing [25,35], lithium-ion batteries [36][37][38], water treatment [39][40][41], and catalysis [42].…”

Section: Introductionmentioning

confidence: 99%

Hematite at its thinnest limit

et al. 2020

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Motivated by the recent synthesis of two-dimensional α-Fe2O3 [Balan et al. Nat. Nanotech. 13, 602 (2018)], we analyze the structural, vibrational, electronic and magnetic properties of singleand few-layer α-Fe2O3 compared to bulk, by ab-initio and Monte-Carlo simulations. We reveal how monolayer α-Fe2O3 (hematene) can be distinguished from the few-layer structures, and how they all differ from bulk through observable Raman spectra. The optical spectra exhibit gradual shift of the prominent peak to higher energy, as well as additional features at lower energy when α-Fe2O3 is thinned down to a monolayer. Both optical and electronic properties have strong spin asymmetry, meaning that lower-energy optical and electronic activities are allowed for the single-spin state. Finally, our considerations of magnetic properties reveal that 2D hematite has anti-ferromagnetic ground state for all thicknesses, but the critical temperature for Morin transition increases with decreasing sample thickness. On all accounts, the link to available experimental data is made, and further measurements are prompted.

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Section: Introductionmentioning

confidence: 99%

Hematite at its thinnest limit

et al. 2020

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“…Among them, the highly crystalline α-Fe 2 O 3 and γ-Fe 2 O 3 are the common polymorph in nature and have been well-studied. Hematite (α-Fe 2 O 3 ), the most stable iron oxide, has been widely investigated due to its wide applications in gas sensor, , lithium ion battery, − water treatment, − and catalyst . Meanwhile, maghemite (γ-Fe 2 O 3 ), the second most common Fe 2 O 3 polymorph in nature, has also been explored in the fields of medical biotechnology, adsorption agents, , and photocatalyst owing to the biochemical properties and the unique magnetic.…”

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confidence: 99%

Iron Oxide with Different Crystal Phases (α- and γ-Fe₂O₃) in Electroanalysis and Ultrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS

Jiang

et al. 2015

Anal. Chem.

139

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Iron oxide with different crystal phases (α- and γ-Fe2O3) has been applied to electrode coatings and been demonstrated to ultrasensitive and selective electrochemical sensing toward heavy metal ions (e.g., Pb(II)). A range of Pb(II) contents in micromoles (0.1 to 1.0 μM) at α-Fe2O3 nanoflowers with a sensitivity of 137.23 μA μM(-1) cm(-2) and nanomoles (from 0.1 to 1.0 nM) at γ-Fe2O3 nanoflowers with a sensitivity of 197.82 μA nM(-1) cm(-2) have been investigated. Furthermore, an extended X-ray absorption fine structure (EXAFS) technique was applied to characterize the difference of local structural environment of the adsorbed Pb(II) on the surface of α- and γ-Fe2O3. The results first showed that α- and γ-Fe2O3 had diverse interaction between Pb(II) and iron (hydro)oxides, which were consistent with the difference of electrochemical performance. Determining the responses of Cu(II) and Hg(II) as the most appropriate choice for comparison, the stripping voltammetric quantification of Pb(II) with high sensitivity and selectivity at γ-Fe2O3 nanoflower has been demonstrated. This work reveals that the stripping performances of a nanomodifier have to be directly connected with its intrinsic surface atom arrangement.

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Facet and Phase‐dependent Electroanalysis Performance of Nanocrystals in PTS Monitoring: Demonstrated by Density Functional Theory X‐ray Absorption Fine Structure Spectroscopy

Zhou

Huang

2018

Persistent Toxic Substances Monitoring

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Photochemical treatment of As(III) with α-Fe2O3 synthesized from Jarosite Waste

Cited by 12 publications

References 44 publications

Hematite at its thinnest limit

Hematite at its thinnest limit

Iron Oxide with Different Crystal Phases (α- and γ-Fe₂O₃) in Electroanalysis and Ultrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS

Facet and Phase‐dependent Electroanalysis Performance of Nanocrystals in PTS Monitoring: Demonstrated by Density Functional Theory X‐ray Absorption Fine Structure Spectroscopy

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Photochemical treatment of As(III) with α-Fe2O3 synthesized from Jarosite Waste

Cited by 12 publications

References 44 publications

Hematite at its thinnest limit

Hematite at its thinnest limit

Iron Oxide with Different Crystal Phases (α- and γ-Fe2O3) in Electroanalysis and Ultrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS

Facet and Phase‐dependent Electroanalysis Performance of Nanocrystals in PTS Monitoring: Demonstrated by Density Functional Theory X‐ray Absorption Fine Structure Spectroscopy

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Product

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Iron Oxide with Different Crystal Phases (α- and γ-Fe₂O₃) in Electroanalysis and Ultrasensitive and Selective Detection of Lead(II): An Advancing Approach Using XPS and EXAFS