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- W1967715010 abstract "Multifunctional mesoporous material (NH2&Ph-SBA-15) was synthesized by co-condensation of tetraethyl orthosilicate, amine-silane and phenyl-silane in the presence of triblock copolymer P123. The Pd nanoparticles immobilized on the NH2&Ph-SBA-15 support were fabricated by the impregnation and subsequent reduction method. The XRD, TEM, N2 sorption, IR and solid NMR measurements revealed that this novel mesoporous Pd catalyst (Pd/NH2&Ph-SBA-15) not only maintained ordered hexagonal mesopores, but also possessed characteristics of the two organic functional groups on the mesopore surface. Compared with Pd nanoparticles supported on the parent SBA-15 or monofunctionalized mesoporous materials, it displayed much higher catalytic reactivity and selectivity in the water-medium Ullmann reaction. This could be attributed to the synergic promoting effect derived from binary organic functional groups since the NH2-groups led to the uniform dispersion of Pd nanoparticles inside the pore channels while the Ph-groups decreased the diffusion limitation of organic molecules in water. Furthermore, it could be conveniently recovered and recycled six times without significant loss of activity and selectivity." @default.
- W1967715010 created "2016-06-24" @default.
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- W1967715010 date "2012-01-01" @default.
- W1967715010 modified "2023-09-23" @default.
- W1967715010 title "Multifunctional mesoporous silica supported palladium nanoparticles as efficient and reusable catalyst for water-medium Ullmann reaction" @default.
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- W1967715010 doi "https://doi.org/10.1039/c2nj21073h" @default.
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