Journal
DALTON TRANSACTIONS
Volume 48, Issue 23, Pages 8227-8237Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9dt00248k
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Funding
- Ministry of Science and Technology of Taiwan [MOST 105-2119-M-008-012]
- National Taipei University of Technology
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Carboxylic acid (-COOH) functionalized large pore mesoporous silica SBA-16 is prepared and utilized as the support to synthesize Cu nanoparticles (NPs). The interaction between the -COOH groups in the support and the metal precursors effectively controls the dispersion and size of the Cu NPs. The Cu NP encapsulated large pore SBA-16 is used as a catalyst for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The catalyst shows an excellent reaction rate of 1.55 x 10(-2) s(-1) and an outstanding activity of 950 s(-1) g(-1). The prominent catalytic activity can be attributed to the nanoscale dimension of the Cu NPs (ca. 5 nm) and their homogeneous distribution, and the 3D pore architecture of the support that allows easy transportation of the reactants. The cage-type mesopores of the support SBA-16 also effectively prevent aggregation and leaching of Cu NPs, and thus exhibit similar catalytic activity for several cycles, indicative of its superb durability.
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