Herein, a heterogeneous Pd catalyst was prepared by embedding Pd nanoparticles in a highly porous nitrogen-doped mesoporous carbon (NMCs) synthesized by the ZIF-8 template. The as-prepared Pd/NMC catalyst was efficient and recyclable in mild catalytic hydrodechlorination of 4-chlorophenol, 2,4-dichlorophenol and 2,4,6-trichlorophenol, showing superior performances to those of the activated carbon-supported Pd commercial catalysts.
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http://dx.doi.org/10.1039/c9cc09494f | DOI Listing |
J Environ Manage
January 2025
GREENMAT, CESAM Research Unit, Institute of Chemistry B6, University of Liège, 4000, Liège, Belgium.
Hydroxyapatite (HA) is known to be the main component of the mineral part of bones. Due to its properties HA is studied for various applications such as bone graft, drug carrier, heterogeneous catalyst or sorbent for waste water treatment. HA can be synthesized or valorized from bone wastes, as the food industry produce billions of kilograms of animal bones.
View Article and Find Full Text PDFACS Appl Mater Interfaces
January 2025
State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.
Frustrated Lewis pair chemistry (FLP) occupy a crucial position in nonmetal-mediated catalysis, especially toward activation of inert gas molecules. Yet, one formidable issue of homogeneous FLP catalysts is their instability on preservation and recycling. Here we contribute a general solution that marries the polyhedral oligomeric silsesquioxane (POSS) with a structurally specific frustrated Lewis acid to fabricate porous polymer networks, which can form water-insensitive heterogeneous FLP catalysts upon employing Lewis base substrates.
View Article and Find Full Text PDFMolecules
January 2025
Institute for Organic Synthesis and Photoreactivity of the Italian National Research Council, Area della Ricerca di Bologna, Via P. Gobetti, 101, 40129 Bologna, Italy.
The utilization of the homogeneous ()-2-pyrrolidine-tetrazole organocatalyst (Ley catalyst) in the self-condensation of ethyl pyruvate and cross-aldol reactions of ethyl pyruvate donor with non-enolizable pyruvate acceptors, namely the sterically hindered ethyl 3-methyl-2-oxobutyrate or the highly electrophilic methyl 3,3,3-trifluoropyruvate, is described as the key enantioselective step toward the synthesis of the corresponding biologically relevant isotetronic acids featuring a quaternary carbon functionalized with ester and alkyl groups. The transition from homogeneous to heterogeneous flow conditions is also investigated, detailing the fabrication and operation of packed-bed reactors filled with a silica-supported version of the pyrrolidine-tetrazole catalyst (SBA-15 as the matrix).
View Article and Find Full Text PDFMolecules
January 2025
State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
Metal-free materials have been proved to be promising replacements of traditional metal-based catalysts for advanced oxidation reactions. Carbon nitride was found to be able to activate HO and generate hydroxyl radicals (•OH). Nevertheless, the performance of carbon nitride is highly dependent on an external light source.
View Article and Find Full Text PDFSci Rep
January 2025
College of Pharmacy, The Islamic University, Najaf, Iraq.
Palladium nanoparticles were supported on L-H-functionalized KIT-6 (KIT-6@L-H-Pd) and evaluated using various characterization techniques such as TGA, FT-IR, SEM, XRD, EDS, and BET. KIT-6@L-H-Pd showed excellent catalytic performance as a recyclable nanocatalyst for the oxidation of sulfides to sulfoxides and the amination of aryl halides. This approach offers multiple benefits, including the use of readily available and cost-effective materials, a straightforward procedure, short reaction durations, high yields, and a catalyst that is easy to separate and reuse.
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