Oriented immobilization of Au nanoparticles on C@P4VP core–shell microspheres and their catalytic performance

Abstract

A highly efficient inorganic–organic hybrid catalyst C@P4VP–Au is synthesized by the seeded emulsion polymerization and immobilization process.

Core–shell nanoparticles: synthesis and applications in catalysis and electrocatalysis

“…[287][288][289][290][291][292][293][294][295][296][297] In this section, various catalytic reactions by CSNs 298 are described, such as hydrogenation reactions, oxidation reactions, cross-coupling reactions, tandem deprotection-Knoevenagel and Henry reactions, aerobic oxidative esterifications and synthesis of bulk chemicals (e.g., adipic acid), etc. [287][288][289][290][291][292][293][294][295][296][297] In this section, various catalytic reactions by CSNs 298 are described, such as hydrogenation reactions, oxidation reactions, cross-coupling reactions, tandem deprotection-Knoevenagel and Henry reactions, aerobic oxidative esterifications and synthesis of bulk chemicals (e.g., adipic acid), etc.…”

“…The systematic design and synthesis of core-shell nanocatalysts comprising active metal NPs in the core and closely assembled structures with nano-gaps in the shell to permit substrates access to the core metal can allow access to highly selective nanocatalysts. [287][288][289][290][291][292][293][294][295][296][297] In this section, various catalytic reactions by CSNs 298 are described, such as hydrogenation reactions, oxidation reactions, cross-coupling reactions, tandem deprotection-Knoevenagel and Henry reactions, aerobic oxidative esterifications and synthesis of bulk chemicals (e.g., adipic acid), etc.…”

Hairy silica nanosphere supported metal nanoparticles for reductive degradation of dye pollutants

“…[15][16][17][18][19] However, the direct utilization of MNPs in a liquid-catalysis process has been limited by their irreversible agglomeration and time-consuming separation. 20,21 To address this issue, one of the most effective routes is immobilization of MNPs on solid supports such as polymers, [22][23][24][25] mesoporous silica, [26][27][28] metal-organic frameworks (MOFs), 29,30 carbon, [31][32][33][34] bers, 35,36 and metal oxides, 37,38 which may improve their dispersity and stability. 39 Among these nanostructures, silica nanospheres are deemed as good candidates for MNP catalyst supports due to their uniform spherical geometry, and good chemical stability.…”

Synthesis of pH-responsive nanocomposites of gold nanoparticles and graphene oxide and their applications in SERS and catalysis

“…4 The limitation can be overcome by immobilizing Au NPs on diverse supports, such as SiO 2 , carbon, and polymer microspheres, etc. [5][6][7] Among these supports, graphene and its derivatives (graphene oxide, GO, and reduced graphene oxide, RGO) have been studied extensively due to their planar structure, high surface area and excellent physicochemical properties. 8 Compared to graphene, GO can be produced in a low-cost and high-yield manner, and is therefore more suitable for practical applications.…”

“…The protonation/deprotonation of pyridine units induced signicant changes in the microenvironment of GO/P4VP assembles, and allowed for applications in pHinduced switchable bioelectronics, intelligent nanodevices and pH-triggered drug delivery system. 11,23,24 Recently, Li et al 6 synthesized core-shell C@P4VP microspheres by coating P4VP shells on the surfaces of carbon spheres, and then the microspheres were used to support Au NPs for catalytic reduction of 4nitrophenol. Their results indicated that the polymeric P4VP shell not only endowed the catalyst with smart pHresponsibility but also enhanced its catalytic activity and cycle stability.…”