Boosting cumene hydrogen transfer via a Ru-based porphyrin covalent organic framework for tandem air epoxidation of olefins
Peer-Reviewed Publication
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As an important class of versatile organic compounds and reactive intermediates, epoxides are widely used in pharmaceuticals, pesticides, coatings, and other fields. They have high chemical activity and can be further converted into other high-value chemicals. Thus, the large-scale application and the huge market demands have attracted significant attention from numerous enterprises and research institutions.
Volume 14, Issue 12 of Journal of Advanced Ceramics (ISSN 2226-4108) features a dedicated special issue focusing on Frontiers in Advanced Ceramic Materials for Microwave Absorption.
High-temperature resistant inorganic aerogels hold irreplaceable importance in the field of thermal protection owing to their excellent thermal insulation properties. Exploring aerogel systems with novel microstructures and high temperature resistance limits has become a research hotspot. Aluminum borate ceramics possess high modulus, high strength, exceptional temperature resistance and corrosion resistance. Accordingly, hierarchically structured aluminum borate whisker aerogels represent a new competitive thermal protection material due to their unique microstructure, high temperature resistance limit and superior thermal insulation performance.
A novel thermally-responsive lubricant infused surface (TLIS) using composite phase change materials (CPCMs) can effectively resist scale formation under temperature change and water flushing environment. The TLIS combines the structural stability of high melting point component with the lubricating properties of low melting point component, enabling repeatable, high-efficiency descaling and offering long-term applications in heat exchange systems.
Low-dielectric continuous ceramic fibers with thermal and load-bearing functions are critical for accident-tolerant composites in aerospace shuttles. Leveraging Si2N2O ceramics high-temperature-resistance exceeding 1700°C, this study develops near-stoichiometric sinoite fibers via precursor conversion, achieving 1.53 GPa tensile strength. Fibers retain 65% strength at 1600°C in nitrogen; after 1700°C treatment, surface Si2N2O crystallization forms a mosaic-shell structure, maintaining 51% strength with low porosity. Offering superior high-temperature-resistance versus alumina and Si3N4 fibers, these sinoite fibers promise reinforcement for thermal protection systems and electromagnetic components served in extreme environments.