Rational control of nanoparticle (NP) size distribution during operation is crucial to improve catalytic performance and noble metal sustainability. Herein, we explore the Ostwald ripening (OR) of metal atoms on zeolite surfaces by a coupled theoretical-experimental approach. Zeolites with the same structure (ZSM-5) but different concentrations of aluminum doped into the matrix were observed to yield systematic differences in supported nanoparticle size distributions. Our first-principles simulations suggest that NP stability at high temperature is governed by both geometric constraints and the roughness of the energetic landscape. Calculated adatom migration paths across the zeolite surface and desorption paths from the supported NPs lend insight into the modified OR sintering processes with the emergence of different binding configurations as the aluminum concentration increases from pristine to heavily doped ZSM-5. These findings reveal the potential for the rational design of support structures to suppress OR sintering.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.nanolett.9b02237 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Preparation and characterization of chickpea protein isolate-grape seed proanthocyanidin-konjac gum ternary complex: Focusing on structure, gel properties, stability and functional properties.
Int J Biol Macromol
January 2025
School of Food Science and Engineering, Ningxia University, Yinchuan, Ningxia 750021, China. Electronic address:
The ternary complex effectively prevents droplet aggregation, Ostwald ripening, and phase separation through its gel network, thereby demonstrating its capability in bioactive compound delivery. In this work, the influence of varying chickpea protein isolate (CPI) levels on the microstructure, gel characteristics, stability and functional properties of grape seed proanthocyanidin (GSP) and konjac gum (KGM) stabilized ternary complexes was investigated. Visual appearance indicated the formation of a non-stratified ternary complex as the CPI enhanced to 3-4 %.
View Article and Find Full Text PDFUsing Commercial Bio-Functional Fungal Polysaccharides to Construct Emulsion Systems by Associating with SPI.
Foods
January 2025
Guangdong Engineering Laboratory of Biomass High-Value Utilization, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China.
Fungi polysaccharides are nutraceutical-rich compounds with bioactive properties, offering promising applications in food formulation. This study examined the non-covalent complexation of commercial polysaccharides derived from the fruiting bodies of (AA) and (GL) and soy protein isolate to enhance emulsifying properties. Complexes were examined across protein-to-polysaccharide ratios (0:1 to 1:0), pH levels (3 to 7), and heat treatment conditions.
View Article and Find Full Text PDFGrowth of Hexagonal Boron Nitride from Molten Nickel Solutions: A Reactive Molecular Dynamics Study.
ACS Appl Mater Interfaces
January 2025
Department of Anatomy and Physiology, Kansas State University, Manhattan, Kansas 66506, United States.
Metal flux methods are excellent for synthesizing high-quality hexagonal boron nitride (hBN) crystals, but the atomic mechanisms of hBN nucleation and growth in these systems are poorly understood and difficult to probe experimentally. Here, we harness classical reactive molecular dynamics (ReaxFF) to unravel the mechanisms of hBN synthesis from liquid nickel solvent over time scales up to 30 ns. These simulations mimic experimental conditions by including relatively large liquid nickel slabs containing dissolved boron and a molecular nitrogen gas phase.
View Article and Find Full Text PDFAdvances in Programmable Control of Ostwald Ripening for Tailoring Material Properties: Challenges, Applications, and Future Perspectives.
Chemistry
January 2025
UESTC: University of Electronic Science and Technology of China, Institute of Fundamental and Frontier Sciences, Jianshe Road, Chengdu, CHINA.
During the past decade, enlightened by the better understanding of the mechanism of Ostwald ripening (OR), programmable control of OR process have gained popularity in the fields from nanocrystals to bulk materials in virtue of its important on regulating the structural and chem-physical properties. In this perspective, we systematically summarize the up-to date advanced applications of OR process involved in nanomaterials and bulk material properties. The potential challenges and perspectives for further research are highlighted.
View Article and Find Full Text PDFEnhancing the stability of tocotrienol nanoemulsion developed using ultrasonic treatment with amphiphilic starch nanoparticles serving as the matrix.
J Sci Food Agric
January 2025
Department of Food Engineering and Technology, School of Engineering, Tezpur University, Tezpur, India.
Background: Octenylsuccinic anhydride (OSA) is one of the efficient compounds used in food industries as an emulsifier. The current study describes the augmentation of tocotrienol (T3) bioavailability by combining it with OSA and then converting it into a nanoemulsion. The creation of the nanoemulsions ASG-T3U, ASG-T3U and ASG-T3U involved ultrasonication power at 300 W for 10, 20 and 30 cycles, respectively.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!