Magnetic polyaniline-chitosan nanocomposite decorated with palladium nanoparticles for enhanced catalytic reduction of 4-nitrophenol

Ayad, Mohamad M.; Amer, Wael A.; Kotp, Mohammed G.

doi:10.1016/j.mcat.2017.06.023

Cited by 105 publications

(29 citation statements)

References 92 publications

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“…Moreover, as a first step to evaluate the feasibility of applying the Pd-loaded beads as precursors of supported catalysts, the metal-loaded sorbents were submitted to a reduction process and thereafter their catalytic activity was tested by a simple reaction: the reduction of 3-nitrophenol in the presence of sodium formate (hydrogen donor). Obviously, this simple hydrogenation reaction has no commercial interest; however, this model reaction, which is easily carried out, is frequently used for the pre-characterization of heterogeneous hydrogenation catalysts [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A new method for incorporating polyethyleneimine (PEI) in algal beads: High stability as sorbent for palladium recovery and supported catalyst for nitrophenol hydrogenation

Wang

Vincent

Faur

et al. 2019

Materials Chemistry and Physics

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Section: Introductionmentioning

confidence: 99%

A new method for incorporating polyethyleneimine (PEI) in algal beads: High stability as sorbent for palladium recovery and supported catalyst for nitrophenol hydrogenation

Wang

Vincent

Faur

et al. 2019

Materials Chemistry and Physics

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“…This was because we introduced argon into the solution before the start of the reaction, the effect of dissolved oxygen in the water on the reaction was excluded. Secondly, the reducing agent sodium borohydride is in absolute excess, so pseudo‐first‐order kinetic assumptions can be applied to the 4‐nitrophenol alone (Equation ) . A 0 is the absorbance at time 0, A t is the absorbance at time t, and Kapp is the apparent rate constant for reaction.…”

Section: Resultsmentioning

confidence: 99%

Ultra‐low‐loading palladium nanoparticles stabilized on nanocrystalline Polyaniline (Pd@PANI): A efficient, green, and recyclable catalyst for the reduction of nitroarenes

Wang

Yuan

et al. 2019

Applied Organom Chemis

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Ultra-low-loading Pd@PANI nanocomposites (0.048 w.t% Pd) were synthesized via a method that combined interfacial polymerization and in situ composite with camphor sulfonic acid ((+)-CSA) as a dopant. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectra, and X-ray photoelectron spectroscopy (XPS) were performed to characterize the structures. It can be used as an efficient catalyst for the reduction of nitroarenes in aqueous solution by using a smaller amount of NaBH 4 (2.5 equiv.) at room temperature with high activity (TON = 3.4 × 10 3 ), good stability (cycled eight times), as well as wide applicability (27 substrates). The catalyst also showed a marvelous activity in the gram-level reaction (yield = 92%). UV-Visible spectrophotometry was used to investigate the reaction kinetics for the reduction of 4-nitrophenol to 4-aminophenol, and the results reconfirmed the excellent performance of the catalyst. The unique properties and superior performance of the prepared ultra-low-loading Pd@PANI nanocomposites lead it be an attractive alternative catalyst for conventional organic catalytic applications. KEYWORDScatalytic performance, palladium nanoparticle, polyaniline, reduction of nitroarenes in water, reused for multiple cycles

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“…Great efforts have been devoted toward the preparation of CP nanomaterials for the fabrication of miniaturized novel flexible sensor platforms that enable portability and high-density arrays because of using small sample amounts, which offer excellent prospects in sensor nanotechnology for advanced detection systems [21]. Recent studies have demonstrated the synthesis of nanostructured CPs with controlled shape and size, which ranged from lithographic techniques to chemical methods [22][23][24][25][26][27][28][29][30][31][32][33]. Stejskal and coworkers demonstrated synthesizing PANI nanostructures and its derivatives by the chemical oxidative polymerization in water [34][35][36].…”

Section: Synthesis Of Nanostructured Conducting Polymersmentioning

confidence: 99%

Gas Sensors Based on Conducting Polymers

Torad¹,

Ayad²

2020

Gas Sensors

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Since the discovery of conducting polymers (CPs), their unique properties and tailor-made structures on-demand have shown in the last decade a renaissance and have been widely used in fields of chemistry and materials science. The chemical and thermal stability of CPs under ambient conditions greatly enhances their utilizations as active sensitive layers deposited either by in situ chemical or by electrochemical methodologies over electrodes and electrode arrays for fabricating gas sensor devices, to respond and/or detect particular toxic gases, volatile organic compounds (VOCs), and ions trapping at ambient temperature for environmental remediation and industrial quality control of production. Due to the extent of the literature on CPs, this chapter, after a concise introduction about the development of methods and techniques in fabricating CP nanomaterials, is focused exclusively on the recent advancements in gas sensor devices employing CPs and their nanocomposites. The key issues on nanostructured CPs in the development of state-of-the-art miniaturized sensor devices are carefully discussed. A perspective on next-generation sensor technology from a material point of view is demonstrated, as well. This chapter is expected to be comprehensive and useful to the chemical community interested in CPs-based gas sensor applications.

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Magnetic polyaniline-chitosan nanocomposite decorated with palladium nanoparticles for enhanced catalytic reduction of 4-nitrophenol

Cited by 105 publications

References 92 publications

A new method for incorporating polyethyleneimine (PEI) in algal beads: High stability as sorbent for palladium recovery and supported catalyst for nitrophenol hydrogenation

A new method for incorporating polyethyleneimine (PEI) in algal beads: High stability as sorbent for palladium recovery and supported catalyst for nitrophenol hydrogenation

Ultra‐low‐loading palladium nanoparticles stabilized on nanocrystalline Polyaniline (Pd@PANI): A efficient, green, and recyclable catalyst for the reduction of nitroarenes

Gas Sensors Based on Conducting Polymers

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