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Issue 8, 2019
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Ordered mesoporous silica cubic particles decorated with silver nanoparticles: a highly active and recyclable heterogeneous catalyst for the reduction of 4-nitrophenol

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Abstract

In this work, using a modified Stöber process, we synthesized ordered mesoporous silica cubic particles (OMS-C) and prepared a nanocatalyst (Ag–OMS-C) based on OMS-C with a high surface area via an in situ auto-reduction strategy. The as-prepared Ag–OMS-C nanocomposites demonstrated open mesopores (3.51 nm), a large specific surface area (540 m2 g−1) and a high pore volume (0.88 cm3 g−1). The catalytic reduction of 4-nitrophenol (4-NP) over the Ag–OMS-C nanocatalyst was almost complete within 150 s without stirring and the rate constant k (30 × 10−3 s−1) is much higher than those of other substrate-supported Ag nanocatalysts. Moreover, the Ag–OMS-C nanocomposites hold a stable catalytic efficiency over five reaction cycles. The results indicate that the Ag–OMS-C nanocatalyst exhibited high catalytic activity and good reusability toward the reduction of 4-NP, which might be attributed to the large specific surface area, the pore structure of the nanocatalyst, as well as the synergistic effect between OMS-C and AgNPs.

Graphical abstract: Ordered mesoporous silica cubic particles decorated with silver nanoparticles: a highly active and recyclable heterogeneous catalyst for the reduction of 4-nitrophenol

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Publication details

The article was received on 25 Nov 2018, accepted on 21 Jan 2019 and first published on 22 Jan 2019


Article type: Paper
DOI: 10.1039/C8DT04663H
Citation: Dalton Trans., 2019,48, 2692-2700

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    Ordered mesoporous silica cubic particles decorated with silver nanoparticles: a highly active and recyclable heterogeneous catalyst for the reduction of 4-nitrophenol

    H. Fan, X. Liu, X. Xing, B. Li, K. Wang, S. Chen, Z. Wu and D. Qiu, Dalton Trans., 2019, 48, 2692
    DOI: 10.1039/C8DT04663H

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