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Letteratura scientifica selezionata sul tema "Δ-FeOOH"

Autore: Grafiati

Pubblicato: 21 dicembre 2024

Ultima modifica: 31 luglio 2025

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Articoli di riviste sul tema "Δ-FeOOH"

Andrade, Thainá Gusmão, Mayra Soares Santos, Luiz Fernando Oliveira Maia, et al. "Iron Oxide Nanomaterials for the Removal of Cr(VI) and Pb(II) from Contaminated River After Mariana Mining Disaster." Journal of Nanoscience and Nanotechnology 21, no. 3 (2021): 1711–20. http://dx.doi.org/10.1166/jnn.2021.19089.

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If not properly treated, water contaminated with chromium (Cr(VI)) and lead (Pb(II)) can cause severe damage to health due to the accumulation of those toxic metals in the human body. Therefore, in this work, three iron oxides, i.e., δ-FeOOH, cystine-functionalized δ-FeOOH (Cys-δ-FeOOH), and Fe3O4, were synthesized and used as adsorbents for Cr(VI) and Pb(II) in water. The results indicated that the Cr(VI) is best adsorbed on cys-δ-FeOOH followed by δ-FeOOH and Fe3O4. It was because of the enhanced interaction between Cr(VI) and the cysteine functional groups on the δ-FeOOH surface. The Cr(VI)

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Lu, Bin, Mei Qin, Ping Li, Shu Ping Wang та Yu Wei. "The Influence Factors on δ-FeOOH Nanosheets Preparation". Materials Science Forum 852 (квітень 2016): 401–6. http://dx.doi.org/10.4028/www.scientific.net/msf.852.401.

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δ-FeOOH nanosheets have been synthesized on a large-scale by a simple method using NH3·H2O as precipitant at pH 10. The samples were characterized by FESEM, XRD, TEM, FTIR and PPMS. The results of this characterization reveal that the complexes [FeIII(OH)n(NH3)m]3−n formed between Fe3+ ions and NH3 favor nucleation and oriented growth of δ-FeOOH nanosheets. The influences of precipitant, the initial pH, and concentration of H2O2 on the structure and morphology of the as-prepared δ-FeOOH have been investigated. Magnetic investigations show that the δ-FeOOH nanosheets exhibit high coercivity.

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Wu, Shijiao, Jianwei Lu, Zecong Ding, Na Li, Fenglian Fu, and Bing Tang. "Cr(vi) removal by mesoporous FeOOH polymorphs: performance and mechanism." RSC Advances 6, no. 85 (2016): 82118–30. http://dx.doi.org/10.1039/c6ra14522a.

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The mesoporous FeOOH polymorphs, i.e., goethite (α-FeOOH), akaganeite (β-FeOOH), lepidocrocite (γ-FeOOH), and feroxyhyte (δ-FeOOH) were synthesized and characterized before and after reaction with Cr(vi) using various analytical techniques.

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Melo, Wiviane E. R. de, Karoline S. Nantes, Ana L. H. K. Ferreira та ін. "A Disposable Carbon-Based Electrochemical Cell Modified with Carbon Black and Ag/δ-FeOOH for Non-Enzymatic H2O2 Electrochemical Sensing". Electrochem 4, № 4 (2023): 523–36. http://dx.doi.org/10.3390/electrochem4040033.

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Hydrogen peroxide (H2O2) is an essential analyte for detecting neurodegenerative diseases and inflammatory processes and plays a crucial role in pharmaceuticals, the food industry, and environmental monitoring. However, conventional H2O2 detection methods have drawbacks such as lengthy analysis times, high costs, and bulky equipment. Non-enzymatic sensors have emerged as promising alternatives to overcome these limitations. In this research, we introduce a simple, portable, and cost-effective non-enzymatic sensor that uses carbon black (CB) and silver nanoparticle-modified δ-FeOOH (Ag/δ-FeOOH)

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Nantes, Karoline S., Ana L. H. K. Ferreira, Marcio C. Pereira, Francisco G. E. Nogueira та André S. Afonso. "A Novel Non-Enzymatic Efficient H2O2 Sensor Utilizing δ-FeOOH and Prussian Blue Anchoring on Carbon Felt Electrode". C 10, № 3 (2024): 82. http://dx.doi.org/10.3390/c10030082.

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In this study, an efficient H2O2 sensor was developed based on electrochemical Prussian blue (PB) synthesized from the acid suspension of δ-FeOOH and K3[Fe(CN)6] using cyclic voltammetry (CV) and anchored on carbon felt (CF), yielding an enhanced CF/PB-FeOOH electrode for sensing of H2O2 in pH-neutral solution. CF/PB-FeOOH electrode construction was proved by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD), and electrochemical properties were verified by impedance electrochemical and CV. The synergy of δ-FeOOH and PB coupled to CF inc

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Ren, Yingzhi, Xiaoming Sun, Yao Guan, et al. "Distribution of Rare Earth Elements plus Yttrium among Major Mineral Phases of Marine Fe–Mn Crusts from the South China Sea and Western Pacific Ocean: A Comparative Study." Minerals 9, no. 1 (2018): 8. http://dx.doi.org/10.3390/min9010008.

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Marine hydrogenetic Fe–Mn crusts on seamounts are known as potential mineral resources of rare earth elements plus yttrium (REY). In recent years, increasing numbers of deposits of Fe–Mn crusts and nodules were discovered in the South China Sea (SCS), yet the enrichment mechanism of REY is yet to be sufficiently addressed. In this study, hydrogenetic Fe–Mn crusts from the South China Sea (SCS) and the Western Pacific Ocean (WPO) were comparatively studied with mineralogy and geochemistry. In addition, we used an in situ REY distribution mapping method, implementing laser ablation inductively c

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Jurkin, Tanja, Goran Štefanić, Goran Dražić та Marijan Gotić. "Synthesis route to δ-FeOOH nanodiscs". Materials Letters 173 (червень 2016): 55–59. http://dx.doi.org/10.1016/j.matlet.2016.03.009.

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Gotić, M., S. Popović та S. Musić. "Formation and characterization of δ-FeOOH". Materials Letters 21, № 3-4 (1994): 289–95. http://dx.doi.org/10.1016/0167-577x(94)90192-9.

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Majzlan, Juraj, Christian Bender Koch та Alexandra Navrotsky. "Thermodynamic properties of feroxyhyte (δ′-FeOOH)". Clays and Clay Minerals 56, № 5 (2008): 526–30. http://dx.doi.org/10.1346/ccmn.2008.0560506.

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Xu, Chaowen, Masayuki Nishi та Toru Inoue. "Solubility behavior of δ-AlOOH and ε-FeOOH at high pressures". American Mineralogist 104, № 10 (2019): 1416–20. http://dx.doi.org/10.2138/am-2019-7064.

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Abstract (sommario):

Abstract Low-pressure polymorphs of AlOOH and FeOOH are common natural oxyhydroxides at the Earth's surface, which may transport hydrogen to the deep mantle via subduction. At elevated pressures, the low-pressure polymorphs transform into δ-AlOOH and ε-FeOOH with CaCl2-type structure, which form a solid solution above 18 GPa. Nevertheless, few studies have examined the solid solution behavior of this binary system in detail. In this study, we ascertain the phase relations in the AlOOH–FeOOH binary system at 15–25 GPa and 700–1200 °C. X-ray diffraction (XRD) measurements of quenched samples sho

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Più fonti

Tesi sul tema "Δ-FeOOH"

Gao, Zhengfeng. "Multifunctional 2D nanomaterials for antibacterial and anticancer applications." Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAF033.

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L’oxyde de graphène (GO) et le δ-FeOOH, réputés pour leur biocompatibilité, leurs grandes surfaces spécifiques et leur facilité de fonctionnalisation, présentent un potentiel prometteur pour des applications biomédicales, notamment dans la lutte contre les infections bactériennes et le traitement du cancer.Cette thèse a exploré la synthèse, la fonctionnalisation et les applications de ces matériaux bidimensionnels (2D). Le premier projet a consisté à fonctionnaliser le GO avec des peptides antimicrobiens (AMPs) en utilisant la chimie Click pour améliorer son activité antibactérienne, une strat

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Capitoli di libri sul tema "Δ-FeOOH"

Ishikawa, T. "Structures of Microporous Hematite Particles Prepared from δ-FeOOH." In Fine Particles Science and Technology. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0259-6_13.

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"A study on the importance of controlling precursor concentration, pH, polymer concentration and molecular mass on obtaining well-defined magnetic iron oxide nanoparticles using γ-irradiation." In Book of Abstracts - RAD 2025 Conference. RAD Centre, Niš, Serbia, 2025. https://doi.org/10.21175/rad.abstr.book.2025.32.1.

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Magnetic iron oxide nanoparticles (NPs) are used in various applications, including magnetic storage devices, environmental remediation technologies, magnetic hyperthermia and drug delivery. Iron chemistry is highly diverse due to the versatile behavior of iron in aqueous media. The presence of two stable oxidation states (+2 and +3) and their relative concentrations influence the final product. Extensive research has been conducted on the synthesis of iron oxides. However, the radiolytic synthesis of iron oxide NPs remains much less explored. γ-irradiation is environmentally friendly, efficie

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Atti di convegni sul tema "Δ-FeOOH"

Raman, A., and B. Kuban. "Infrared Spectroscopic Analysis of Phase Transformation Processes in Rust Layers Formed on Weathering Steels in Bridge Spans." In CORROSION 1987. NACE International, 1987. https://doi.org/10.5006/c1987-87424.

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Abstract Infrared spectroscopy was used to study the formation and transformation of rust phases and the weathering characteristics of ASTM A588 weathering steels in bridge spans. The technique enables not only clear differentiation between various rust phases, but also detects various forms of amorphous and not well crystallized rust phases with clarity. Starting from the amorphous mix, a mixture of γ-, δ-FeOOH and ferrihydrite in their highly amorphous forms, the rusting proceeds through the formation first of γ-FeOOH or ferrihydrite, depending on atmospheric conditions, evolution of amorpho

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Ferreira, Ana Luiza Hilário Kunert, Karoline Santos Nantes та André Santiago Afonso. "CONVERSÃO ELETROQUÍMICA DE NANOPARTÍCULAS DE δ-FeOOH EM NANOPARTÍCULAS DE AZUL DA PRÚSSIA SOBRE ELETRODOS IMPRESSOS DE CARBONO MODIFICADOS COM GRAFENO". У V Congresso Online Nacional de Química. Congresse.me, 2023. http://dx.doi.org/10.54265/navz6665.

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