Temperature‐Dependent Study of Catalytic Ag Nanoparticles Entrapped Resin Nanocomposite towards Reduction of 4‐Nitrophenol

Das, Tushar Kanti; Ganguly, Sayan; Remanan, Sanjay; Das, Narayan Ch.

doi:10.1002/slct.201900470

Cited by 34 publications

(13 citation statements)

References 56 publications

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“…The E a and TOF values for the reduction reaction of 4‐NP in the presence of different catalyst systems are given in Table . As seen in Table , the TOF value of Au@Gel for the reduction of 4‐NP is higher than the reported values for ACOS (Ag decorated Co 3 O 4 ), PF‐Ag and AuNPs‐NGQDs …”

Section: Resultsmentioning

confidence: 58%

“…The E a and TOF values for the reduction reaction of 4-NP in the presence of different catalyst systems are given in Table 1. As seen in Table 1, the TOF value of Au@Gel for the reduction of 4-NP is higher than the reported values for ACOS (Ag decorated Co 3 O 4 ), [60] PF-Ag [66] and AuNPs-NGQDs. [68] For the reduction reaction of 4-NP, the activation energy was reported as 31.9 kJmol À for silver nanoparticles supported Ref.…”

mentioning

confidence: 55%

“…Similarly, the E a values were reported to be 50.70 kJmol − , 68.6 kJmol − , 99.40 kJmol − and 45.81 kJmol − for Ca/Co 3 O 4 , AgNC‐1, Au@[C 4 C 16 Im]Br and porous PdNPs catalyst systems used for the 4‐NP reduction reaction, respectively. Additionally, some catalyst systems with E a value below 30 kJmol − were reported in the literature . Accordingly, the Au@Gel catalyst system has lower Ea value compared to some catalyst systems.…”

Section: Resultsmentioning

confidence: 98%

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A New Approach to Synthesis of Highly Dispersed Gold Nanoparticles via Glucose Oxidase‐Immobilized Hydrogel and Usage in The Reduction of 4‐Nitrophenol

et al. 2020

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In this study, for the first time in the literature, synthesis of Au(0) nanoparticles supported by a crosslinked gel structure was performed via enzyme‐mediated reduction of Au(III) ions without using any chemical reductant. In our newly‐developed method, glucose oxidase enzymes immobilized in the crosslinked gelatine structure ensured simultaneous reduction of the Au(III) ions diffused within the gel to Au(0). The Au@Gel obtained was structurally characterised with TEM (Transmission electron microscopy), EDX (Energy dispersive X‐ray analysis) elemental mapping, XPS (X‐Ray photoelectron spectroscopy) and XRD (X‐Ray Diffraction) analyses. The catalytic activity of Au(0) particles with nearly 8 nm size in the Au@Gel was investigated for the reduction of 4‐nitrophenol (4‐NP) as a model compound in the presence of NaBH4 as reducing agent. The activation parameters for the reduction reaction of 4‐nitrophenol in the presence of Au@Gel catalyst were determined as Ea= 30.16 kJmol−, ΔH#= 27.52 kJmol− and ΔS#= −197.45 Jmol−K−. The Au@Gel catalyst system, with good catalytic activity, simultaneously has nearly perfect reusability.

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Section: Resultsmentioning

confidence: 58%

mentioning

confidence: 55%

Section: Resultsmentioning

confidence: 98%

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A New Approach to Synthesis of Highly Dispersed Gold Nanoparticles via Glucose Oxidase‐Immobilized Hydrogel and Usage in The Reduction of 4‐Nitrophenol

et al. 2020

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“…The actual mechanism for the reduction of p-nitrophenol using platinum nanoparticle immobilized on poly (epoxyamine) coated iron oxide nanoparticle catalyst has described in Scheme 3. The typical mechanism involves the steps such as (I) adsorption of the borohydride anion and p-nitrophenol on the surface of the platinum nanoparticle, (II) formation of p-nitrosophenol, (III) formation of p-hydroxyaminophenol, (IV) hydride transfer for the formation of p-aminophenol compound, (V) desorption of the product p-aminophenol and borohydride ions [26,27].…”

Section: Mechanism For the Catalytic Reduction Of P-nitrophenolmentioning

confidence: 99%

Immobilization of Pt nanoparticles on magnetite–poly (epoxyamine) nanocomposite for the reduction of p-nitrophenol

Lakshmi¹,

Rangasamy²,

Prathibha³

et al. 2019

SN Appl. Sci.

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Recently the magnetic nanoparticle earns more attention in the field of catalysis for their enhanced loading capacity and magnetic recylability. In this study, we intended to focus the synthesis of polymer coated iron oxide nanoparticle as support for the immobilization of metal nanoparticles. The typical synthetic statergy involves the synthesis of 1,4-diaminobutane functionalized superparamagnetic Fe 3 O 4 nanoparticle, followed by epoxyamine polymer coating on amine functionalised Fe 3 O 4 using 1,4 diaminobutane and epichlorohydrin monomers through one pot method. Further, ultrafine Pt nanoparticle was immobilised onto poly (epoxyamine) coated Fe 3 O 4 . These materials were characterized using FT-IR, XRD, VSM, EDS, SEM HRTEM etc. The semiheterogenous catalytic efficiency of the material was examined in aqueous phase reduction of p-nitrophenol. The catalyst was reused up to 5 times without loss of activity. Graphic abstractKeywords Magnetite · Poly (epoxy amine) · Nanocomposite · Platinum nanoparticle · Immobilization · p-nitrophenol

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“…Nanocomposites materials (metallic, metal oxides nanoparticles (NPs), carbon nanotubes, matrixes, etc.) offer new opportunities thanks to the synergetic combination of the physical and chemical properties of each component. − Metallic nanoparticles (Au, Ag, Pt, etc.) present interesting optical and electronic properties and potential utility in (electro)catalysis. , Among these noble metallic NPs, silver is particularly attractive because of its low cost, high electrical conductivity, and (electro)catalytic activity. ,, The specific activity of Ag catalysts is strongly related to their morphology and size distribution .…”

Section: Introductionmentioning

confidence: 99%

Removable Composite Electrode Made of Silver Nanoparticles on Pyrolyzed Photoresist Film for the Electroreduction of 4-Nitrophenol

et al. 2019

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Access to removable nanocomposite electrodes for electrosensing of pollutants is of great importance. However, the preparation of reproducible and reliable carbon electrodes decorated with metallic nanoparticles, a prerequisite for trustworthy devices, remains a challenge. Here we describe an innovative and easy method to prepare such electrodes. These latter are silicon coated with a thin carbon film on which controlled silver nanostructures are grafted. Different silver nanostructures and surface coverage of the carbon electrode (16, 36, 51, and 67%) can be obtained through a careful control of the time of the hydrogenolysis of the N-N' isopropyl butylamidinate silver organometallic precursor (t = 1, 5, 15, and 60 min, respectively). Importantly, ail nanocomposite surfaces are efficient for the electrodetection of 4 nitrophenol with a remarkable decrease of the overpotential of the reduction of such molecule up to 330 mV. The surfaces are characteriz.ed by atomic force microscopy, gra:zing Electt"Ocatalysis PPF incidence X ray diffraction, scanning electronic microscopy, and Raman spectroscopy. Furthermore, surface enhanced Raman scattering effect is also observed. The exaltation of the Raman intensity is proportional to the surface coverage of the electrode; the number of hot spots increases with the surface coverage.

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Temperature‐Dependent Study of Catalytic Ag Nanoparticles Entrapped Resin Nanocomposite towards Reduction of 4‐Nitrophenol

Cited by 34 publications

References 56 publications

A New Approach to Synthesis of Highly Dispersed Gold Nanoparticles via Glucose Oxidase‐Immobilized Hydrogel and Usage in The Reduction of 4‐Nitrophenol

A New Approach to Synthesis of Highly Dispersed Gold Nanoparticles via Glucose Oxidase‐Immobilized Hydrogel and Usage in The Reduction of 4‐Nitrophenol

Immobilization of Pt nanoparticles on magnetite–poly (epoxyamine) nanocomposite for the reduction of p-nitrophenol

Removable Composite Electrode Made of Silver Nanoparticles on Pyrolyzed Photoresist Film for the Electroreduction of 4-Nitrophenol

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