An Overview of Environmental Catalysis Mediated by Hydrogen Peroxide

Catalysts, Journal Year: 2024, Volume and Issue: 14(4), P. 267 - 267

Published: April 17, 2024

The use of hydrogen peroxide (produced in situ or ex situ) as the main agent oxidative processes environmental pollutant removal is widely studied. degradation water pollutants, such dyes, pharmaceuticals, cosmetics, petroleum derivatives, and even pathogens, has been successfully obtained by different techniques. This review gives an overview more recent methods developed to apply mediated H2O2 other reactive oxygen species (ROS) catalysis, with particular attention strategies (Fenton-like Bio-Fenton, photo- electro-catalysis) materials employed. A wide discussion about characteristics specifically studied for activation, well their chemical composition morphology, was carried out. Moreover, interesting generation enzymes were also presented efficiency applicability compared Fenton electro-Fenton discussed above. Bio-Fenton bi-enzymatic ROS seems be attractive scalable, although not yet applied full-scale plants. critical feasibility, criticalities, perspectives all considered completes this review.

Language: Английский

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Effect of Structural Defects Induced in LaFeO3 and LaMnO3 Catalysts towards Total Oxidation of 2-Propanol

Catalysis Letters, Journal Year: 2025, Volume and Issue: 155(3)

Published: Feb. 4, 2025

Language: Английский

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Effects of B‐site doping and stoichiometry on strontium ferrate Sr_0.85Ce_0.15Fe_xCo_yO₃ perovskites as electrocatalysts

Journal of the American Ceramic Society, Journal Year: 2025, Volume and Issue: unknown

Published: March 29, 2025

Abstract SrFeO 3 ‐based oxides are multi‐functional ceramics belonging to the ABO ‐type perovskite family, where iron is interestingly present at B‐site as Fe 4+ and partially reducible 3+ by doping strategies tailor physical–chemical properties. When doped, fine‐tuned exploitable in novel energy production systems, for example, electrocatalysts intermediate temperature solid oxide fuel cells (IT‐SOFCs). This work aimed evaluate how composition stoichiometry affect functional properties of materials when A‐site with cerium fixed 15 mol%. Hence, powdered samples were prepared solution combustion synthesis, modulating Fe/Co ratio or (Fe + Co). From an in‐depth characterization, it was found that both nonstoichiometry influenced structure, redox properties, electrochemical behavior. Still, played a major role improving oxygen adsorption capacity mobility, also thanks contribution segregated phases (CeO 2 , Sr O 7− δ ) generated induced unbalancing. The nonstoichiometric sample reached highest reduction capability IT‐SOFC operating (600°C) lowest activation (0.65 eV), whereas cobalt‐rich showed poorer performance electrode. These results encourage further research on tunable cobalt‐poor perovskites energy‐related devices.

Language: Английский

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Keratin/Copper Complex Electrospun Nanofibers for Antibacterial Treatments: Property Investigation and In Vitro Response

Materials, Journal Year: 2024, Volume and Issue: 17(10), P. 2435 - 2435

Published: May 18, 2024

The frontiers of antibacterial materials in the biomedical field are constantly evolving since infectious diseases a continuous threat to human health. In this work, waste-wool-derived keratin electrospun nanofibers were blended with copper by an optimized impregnation procedure fabricate membranes intrinsic biological activity, excellent degradability and good cytocompatibility. keratin/copper complex multi-analytically characterized main differences their physical-chemical features related crosslinking effect caused Cu2+. Indeed, ions modified thermal profiles, improving stability (evaluated differential scanning calorimetry thermogravimetry), changed infrared vibrational (determined spectroscopy) chemical composition (studied X-ray energy-dispersive spectroscopy probe optical emission spectrometry). process also affected morphology, leading partial nanofiber swelling, as evidenced electron microscopy analyses. Then, successfully tested against gram-negative bacteria, Escherichia coli. Regarding cytocompatibility, vitro assays performed L929 cells showed levels cell adhesion proliferation (XTT assay), no significant cytotoxic effect, comparison bare nanofibers. Given these results, material described work can be suitable for use antibiotic-free fibers skin wound dressing or guided tissue regeneration.

Language: Английский

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