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Optimisation of Using Low-Grade Kaolinitic Clays in Limestone Calcined Clay Cement Production (LC3).
Materials (Basel)
January 2025
Instituto Universitario de Investigación de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València, 46022 Valencia, Spain.
LC3 (limestone calcined clay cement) is poised to become the construction industry's future as a so-called low-carbon-footprint cement. Research into this subject has determined the minimum kaolinite content in calcined clays to guarantee good mechanical performance. This study examines the use of clay from the Valencian Community (Spain), which has a lower kaolinite content than the recommended amount (around 30%) for use in LC3 and how its performance can be enhanced by replacing part of that clay with metakaolin.
View Article and Find Full Text PDFProcess, dynamics and bioeffects of acoustic droplet vaporization induced by dual-frequency focused ultrasound.
Ultrason Sonochem
January 2025
Acoustic droplet vaporization (ADV) plays a crucial role in ultrasound-related biomedical applications. While previous models have examined the stages of nucleation, growth, and oscillation in isolation, which may limit their ability to fully describe the entire ADV process. To address this, our study developed an integrated model that unifies these three stages of ADV, stimulated by a continuous nonlinear dual-frequency ultrasound wave.
View Article and Find Full Text PDFDynamic Evolution and Effective Tuning of Lithium Dendrites Revealed by Phase Field Model and 2D Numerical Simulation.
ACS Appl Mater Interfaces
January 2025
State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
Lithium dendrites are widely acknowledged as the main culprit of the degradation of performance in various Li-based batteries. Studying the mechanism of lithium dendrite formation is challenging because of the high reactivity of lithium metal. In this work, a phase field model and in situ observation experiments were used to study the growth kinetics and morphologies of lithium dendrites in terms of anisotropy, temperature, and potential difference.
View Article and Find Full Text PDFStructural Characterization of the Platinum Nanoparticle Hydrogen-Evolving Catalyst Assembled on Photosystem I by Light-Driven Chemistry.
ACS Nano
January 2025
National Synchrotron Light source II, Brookhaven National Laboratory, Upton, New York 11973, United States.
Directed assembly of abiotic catalysts onto biological redox protein frameworks is of interest as an approach for the synthesis of biohybrid catalysts that combine features of both synthetic and biological materials. In this report, we provide a multiscale characterization of the platinum nanoparticle (NP) hydrogen-evolving catalysts that are assembled by light-driven reductive precipitation of platinum from an aqueous salt solution onto the photosystem I protein (PSI), isolated from cyanobacteria as trimeric PSI. The resulting PSI-NP assemblies were analyzed using a combination of X-ray energy-dispersive spectroscopy (XEDS), high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), small-angle X-ray scattering (SAXS), and high-energy X-ray scattering with atomic pair distribution function (PDF) analyses.
View Article and Find Full Text PDFSeparating nanobubble nucleation for transfer-resistance-free electrocatalysis.
Nat Commun
January 2025
School of Materials Science and Engineering, Nanyang Technological University, Singapore, Singapore.
Electrocatalytic gas-evolving reactions often result in bubble-covered surfaces, impeding the mass transfer to active sites. Such an issue will be worsened in practical high-current-density conditions and can cause sudden cell failure. Herein, we develop an on-chip microcell-based total-internal-reflection-fluorescence-microscopy to enable operando imaging of bubbles at sub-50 nm and dynamic probing of their nucleation during hydrogen evolution reaction.
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