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Quantitative Enhancement of Arsenate Immobilization Induced by Vacancy Defects on Various Exposed Lattice Facets of Hematite.
Environ Sci Technol
January 2025
Geomicrobiology, Department of Geosciences, University of Tübingen, Tübingen 72076, Germany.
Defects are common features in hematite that arise from deviations from the perfect mineral crystal structure. Vacancy defects have been shown to significantly enhance arsenate (As) immobilization by hematite. However, the contributions from vacancy defects on different exposed facets of hematite have not been fully quantified.
View Article and Find Full Text PDFComparative study of polymeric nanoparticles and traditional agents in dental implant decontamination.
J Appl Biomater Funct Mater
January 2025
Faculty of Dentistry, Department of Periodontics, Complutense University of Madrid, Madrid, Spain.
Peri-implant diseases, such as peri-implantitis, affect up to 47% of dental implant recipients, primarily due to biofilm formation. Current decontamination methods vary in efficacy, prompting interest in polymeric nanoparticles (NPs) for their antimicrobial and protein-specific cleaning properties. This study evaluated the efficacy of polymeric nanoparticles (NPs) in decontaminating titanium dental implants by removing proteinaceous pellicle layers and resisting recontamination.
View Article and Find Full Text PDFGallium: A Universal Promoter Switching CO Methanation Catalysts to Produce Methanol.
JACS Au
January 2025
Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093 Zurich, Switzerland.
Hydrogenation of CO to methanol is foreseen as a key step to close the carbon cycle. In this study, we show that introducing Ga into silica-supported nanoparticles based on group 8-9 transition noble metals (M = Ru, Os, Rh, and Ir - Ga@SiO) switches their reactivity from producing mostly methane (sel. > 97%) to producing methanol (>50% CHOH/DME sel.
View Article and Find Full Text PDFConstructing SiO-Supported Atomically Dispersed Platinum Catalysts with Single-Atom and Atomic Cluster Dual Sites to Tame Hydrogenation Performance.
JACS Au
January 2025
Interdisciplinary Research Center of Biology and Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
Construction and optimization of stable atomically dispersed metal sites on SiO surfaces are important yet challenging topics. In this work, we developed the amino group-assisted atomic layer deposition strategy to deposit the atomically dispersed Pt on SiO support for the first time, in which the particle size and ratio of Pt entities from single atom (Pt) to atomic cluster (Pt ) and nanoparticle (Pt ) on the SiO surface were well modulated. We demonstrated the importance of dual-site synergy for optimizing the activity of single-atom catalysts.
View Article and Find Full Text PDFCoal fly ash-derived zeolite for efficient ammoniacal nitrogen removal from freshwater pearl farming wastewater.
iScience
January 2025
Department of Biological Environment, Jiyang College of Zhejiang A&F University, Zhuji, China.
Freshwater pearl farming in China generates wastewater high in ammoniacal nitrogen (NH₃-N) posing environmental threats. This study explores the use of coal fly ash (CFA), an industrial waste, to synthesize A-type zeolite for effective NH₃-N removal from pearl farming wastewater. The zeolite was prepared via pickling pretreatment and hydrothermal methods, resulting in a material with favorable adsorption properties, including cubic and spherical microstructures, a specific surface area of 17.
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