Green synthesis of Pt–Au dendrimer-like nanoparticles supported on polydopamine-functionalized graphene and their high performance toward 4- nitrophenol reduction

Ye, Weichun; Yu, Jing; Zhou, Yaxin; Gao, Daqiang; Wang, Daoai; Wang, Chunming; Xue, Desheng

doi:10.1016/j.apcatb.2015.08.013

Cited by 351 publications

(145 citation statements)

References 50 publications

(59 reference statements)

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“…The apparent rate constant (k app ) for lyst with least reaction time and highest rate constant for all the nitrophenols. The rate constant values obtained in the present study were comparatively higher when compared to various other catalytic systems reported in literature [41][42][43][44][45][46] .…”

Section: Kinetics Of Reductioncontrasting

confidence: 48%

Magnetically Retrievable Modified Nickel Ferrite Nanoparticles: Efficient Catalytic Reduction of Nitroarenes and Photo-oxidation of Hazardous Dyes

Goyal

Kapoor

Samuel

et al. 2016

Analytical Chemistry Letters

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Of recently, magnetic nano-ferrites have come forward as excellent catalysts for various organic transformations and mitigation of environmental deterioration. In the present investigation, attempts have been made to beneficially modify nickel ferrite nanoparticles by substituting various transition metal ions in to its lattice for catalytic applications. Synthesis of various modified nickel ferrite (NiM 0.2 Fe 1.8 O 4 (M=Cr, Mn, Fe, Co, Ni, Cu and Zn) nanocatalysts have been carried out employing sol-gel methodology. Catalytic activity of the synthesized nanocatalysts have been evaluated both for the reduction of nitroaromatic compounds and for the deterioration of hazardous dyes. The catalytic performance of all the synthesized compositions have been found to follow the order-Mn > Cu > Co > Fe > Cr > Ni > Zn. The observed order of catalytic efficiency has also been confirmed from the completion time and rate constant values for both the catalytic reactions.

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Section: Kinetics Of Reductioncontrasting

confidence: 48%

Magnetically Retrievable Modified Nickel Ferrite Nanoparticles: Efficient Catalytic Reduction of Nitroarenes and Photo-oxidation of Hazardous Dyes

Goyal

Kapoor

Samuel

et al. 2016

Analytical Chemistry Letters

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“…The catalytic performances of MoS 2 /PMMT were compared with those of other catalysts reported in Refs. [53][54][55][56][57][58][59][60][61] (Table 1). MoS 2 / PMMT showed excellent catalytic activity with the advantages of a low cost and a facile synthetic method.…”

Section: Resultsmentioning

confidence: 98%

Hierarchical MoS2 intercalated clay hybrid nanosheets with enhanced catalytic activity

et al. 2016

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Emerging hierarchical MoS 2 /pillared-montmorillonite (MoS 2 /PMMT) hybrid nanosheets were successfully prepared through facile in-situ hydrothermal synthesis of MoS 2 within the interlayer of cetyltrimethylammonium bromide PMMT, and their catalytic performance was evaluated by the reduction reaction of 4-nitrophenol (4-NP) using NaBH 4 as a reductant. Microstructure and morphology characterization indicated that MoS 2 /PMMT exhibited hybrid-stacked layered structures with an interlayer spacing of 1.29 nm, and the MoS 2 nanosheets were intercalated within the montmorillonite (MMT) layers, with most of the edges exposed to the outside. The catalytic activity and stability of MoS 2 /PMMT were both enhanced by the MMT. With the MoS 2 /PMMT as the catalyst, the apparent reaction rate constant of the 4-NP reduction was 0.723 min −1 and was maintained at ~0.679 min −1 after five reaction cycles. The structural evolution of MoS 2 /PMMT and the possible catalysis mechanism for the reduction reaction of 4-NP were investigated. The as-prepared MoS 2 /PMMT hybrid nanosheets are promising candidates for catalytic application in the water-treatment and biomedical fields. The strategy developed in this study can provide insights for designing hybrid nanosheets with diverse heterogeneous two-dimensional (2D) nanomaterials.

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“…For instance, (i) in the contact process for the manufacture of H 2 SO 4 , (ii) in Ostwald process for the oxidation of NH 3 to NO for the manufacture of HNO 3 , (iii) oxidation of methanol to formaldehyde and (iv) decomposition of hydrazine to nitrogen and ammonia. Platinum-gold dendrimer-like nanoparticles supported on polydopamine graphene oxide reduce nitrophenol to aminophenol [50]. The ability to catalyse the reduction depends on platinum to gold ratios.…”

Section: Reviewmentioning

confidence: 99%

“…A facile route for the synthesis of Pt–Au alloy nanoparticles supported on polydopamine-functionalized graphene has been reported by Ye et al [50]. Their catalytic activity against 4-nitrophenol reduction has also been studied.…”

Section: Reviewmentioning

confidence: 99%

“…It was shown earlier that the multifunctional polymer disperses the reduced graphene oxide in aqueous solution and the functional groups in the biopolymer are then bonded to metal ions and metal nanoparticles. Ye and co-workers [50] had suggested that in the case of reduced graphene oxide, coated with polydopamine, PDA/RGO containing amine and catechol groups act as a reducing agent for PdCl 4 2− /HAuCl 4 , followed by the reduction of ascorbic acid and production of Pt-Au-PDA/RGO. It is not a convincing hypothesis.…”

Section: Reviewmentioning

confidence: 99%

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Green Synthesis, Characterization and Uses of Palladium/Platinum Nanoparticles

2016

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Biogenic synthesis of palladium (Pd) and platinum (Pt) nanoparticles from plants and microbes has captured the attention of many researchers because it is economical, sustainable and eco-friendly. Plant and their parts are known to have various kinds of primary and secondary metabolites which reduce the metal salts to metal nanoparticles. Shape, size and stability of Pd and Pt nanoparticles are influenced by pH, temperature, incubation time and concentrations of plant extract and that of the metal salt. Pd and Pt nanoparticles are broadly used as catalyst, as drug, drug carrier and in cancer treatment. They have shown size- and shape-dependent specific and selective therapeutic properties. In this review, we have discussed the biogenic fabrication of Pd/Pt nanoparticles, their potential application as catalyst, medicine, biosensor, medical diagnostic and pharmaceuticals.

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Green synthesis of Pt–Au dendrimer-like nanoparticles supported on polydopamine-functionalized graphene and their high performance toward 4- nitrophenol reduction

Cited by 351 publications

References 50 publications

Magnetically Retrievable Modified Nickel Ferrite Nanoparticles: Efficient Catalytic Reduction of Nitroarenes and Photo-oxidation of Hazardous Dyes

Magnetically Retrievable Modified Nickel Ferrite Nanoparticles: Efficient Catalytic Reduction of Nitroarenes and Photo-oxidation of Hazardous Dyes

Hierarchical MoS2 intercalated clay hybrid nanosheets with enhanced catalytic activity

Green Synthesis, Characterization and Uses of Palladium/Platinum Nanoparticles

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