Palladium nanoparticles supported by amyloid fibrils: From size controllable synthesis to extremely high catalytic performance

Zhou, Xingfei; Wei, Yuhui; Zhao, Xiuhua; Li, Xing; Zhang, Yi; Li, Bin; Liu, Jinjun

doi:10.1016/j.colsurfa.2015.07.007

Cited by 5 publications

(3 citation statements)

References 47 publications

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“…Pd nanoparticles can catalyze C–C cross-couplings [ 26 ], olefin hydrogenation [ 27 ], and CO oxidation [ 28 ]. The properties of nanomaterials are often related to their size, hence various efforts have been made to control the formation of Pd nanoparticles [ 29 , 30 , 31 ]. Although considerable progress has been made, the preparation of small (<2 nm) Pd NCs with fluorescence remains challenging.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Fluorescent Palladium Nanoclusters

et al. 2018

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Metal nanoclusters, with dimensions between atomic and nanoparticles, have attracted a great deal of attention due to their significantly unusual properties. Water-soluble palladium nanoclusters (Pd NCs) with blue-green fluorescence were synthesized by a water bath heating method, with methionine as a stabilizer and ascorbic acid as a reducing agent. We investigated the optimal synthesis conditions, stability, and pH response of the obtained products in detail. The synthesized materials were characterized by ultraviolet-absorption spectroscopy, fluorescence spectroscopy, high-resolution transmission electron microscopy, and atomic force microscopy. These experimental results showed that the Pd NCs had a small size of ~1.91 nm, with a uniform size distribution. Additionally, the Pd NCs emitted blue-green fluorescence under ultraviolet light with a quantum yield of 5.47%. Notably, both stabilizers and reducing agents used in this synthesis method are nutrients for humans, non-toxic, and harmless. This method could be viewed as a biologically friendly and green way of preparing fluorescent metal nanoclusters. The as-prepared fluorescent Pd NCs also possessed excellent fluorescence detection ability and were very sensitive to low concentrations of hemoglobin, with a linear response in the range of 0.25–3.5 μM and a detection limit of 50 nM.

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Section: Introductionmentioning

confidence: 99%

Green Synthesis of Fluorescent Palladium Nanoclusters

et al. 2018

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“…Palladium as an outstanding catalyst has been widely used for organic synthesis reactions, e.g., hydrogenation, dehydrogenation and C-C coupling reactions. [1][2][3][4] However, industry always meets a trade-off scenario: i.e., the nano-sized particles required for high reactivity versus the difficulty in ne catalyst separation and recovery. Although the homogeneous catalysts usually own high catalytic activities, they are difficult to recover from the reaction mixture.…”

Section: Introductionmentioning

confidence: 99%

Enhanced catalytic properties of Pd nanoparticles by their deposition on ZnO-coated ceramic membranes

et al. 2016

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An efficient and reusable catalyst was developed by loading palladium (Pd) nanoparticles on a ceramic membrane modified with a ZnO nano-coating. The microstructures of the as-prepared Pd-loaded ceramic membranes were characterized by FESEM, EDS, ICP, XPS and HRTEM. Their catalytic properties in liquid-phase p-nitrophenol reduction to p-aminophenol were evaluated. A comparative study was also made with the Pd nanoparticles deposited onto the ceramic membrane without any modification.The XPS and HRTEM results indicate that the ZnO coating can provide strong Pd-Zn interactions on the ceramic membrane, resulting in higher catalytic stability with similar catalytic activity as compared to that without modification. It was found that the leaching and agglomeration of Pd nanoparticles should be responsible for the deactivation of Pd-loaded ceramic membranes. This work would aid the development of membrane catalysts with higher catalytic performance.

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“…Palladium nanoparticles (Pd NPs) play a signicant role in a variety of catalytic reactions, e.g., hydrogenation, dehydrogenation and C-C coupling reactions. [1][2][3][4] To achieve the ease in catalyst separation and recovery, Pd NPs are oen immobilized on solid materials to synthesize the supported catalysts. [5][6][7] To date, a lot of supports, e.g., carbon, 8-10 membranes, 11 silica, 12,13 hydroxyapatite, 14 zeolites 15,16 and organic polymers, 17,18 are available for Pd NP immobilization.…”

Section: Introductionmentioning

confidence: 99%