Facile synthesis of porous anionic hydrogel embedded with nickel nanoparticles and evaluation of its catalytic performance for the rapid reduction of 4-nitrophenol

Ajmal, Muhammad; Aftab, Faiza; Bibi, Iram; Iqbal, Muzaffar; Ambreen, Jaweria; Ahmad, Hafiz Badaruddin; Akhtar, Naeem; Haleem, Abdul; Siddiq, Muhammad

doi:10.1007/s10934-018-0654-8

Cited by 27 publications

(12 citation statements)

References 39 publications

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“…Nickel-containing hydrogel materials are interesting from both a scientific and practical point of view. Hydrogels, containing particles of Ni(0), are widely used as an effective catalyst, for example, in the reduction reaction of 2- and 4-nitrophenols [22,23] and in the hydrolysis of sodium borohydride in an alkaline medium for obtaining hydrogen [24,25].…”

Section: Introductionmentioning

confidence: 99%

Novel Ni/pHEMA-gr-PVP Composites Obtained by Polymerization with Simultaneous Metal Deposition: Structure and Properties

et al. 2019

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The synthesis and study of metal-containing hydrogels, particularly those filled with nickel nanoparticles, is currently of interest to many researchers. This paper presents the results of an investigation of the structure and properties of Ni(0)-filled composites on the basis of 2-hydroxyethylmethacrylate copolymers (HEMA) with polyvinylpyrrolidone (PVP) and their hydrogels. The authors of the article are the first who propose the method to produce these materials by combining the processes of polymer matrix synthesis and a reduction of Ni2+ ions. Synthesis is carried out in one stage without complicated equipment and is technologically simple. It is determined by thermometric research that the temperature conditions required for the chemical reduction of Ni2+ are achieved due to the heat released during the exothermic reaction of HEMA polymerization in the presence of PVP. With the help of Fourier transform infrared analysis, and thermogravimetric and differential-thermal analysis, the formation of a crosslinked graft copolymer based on HEMA and PVP was confirmed, and its structural parameters, including the efficiency of PVP grafting, PVP content in the copolymer, and the molecular weight of the interstitial fragment of the polymer network, were investigated. The results obtained with scanning electron microscopy revealed that the size of the Ni(0) particles is about 500 nm. X-ray structural analysis of the composites obtained confirmed the existence of metal nickel particles. The strength, elastic, sorption, electrical, and magnetic properties of the obtained composites in the solid (dry) and elastic (swollen) physical states, depending on the composition of the copolymer and the content of the metal filler, have been investigated.

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Section: Introductionmentioning

confidence: 99%

Novel Ni/pHEMA-gr-PVP Composites Obtained by Polymerization with Simultaneous Metal Deposition: Structure and Properties

et al. 2019

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“…For example, our research group has previously reported the engineering of a porous bulk hydrogel system with stabilized nickel nanoparticles by copolymerization of acrylic acid and acrylamide followed by in‐situ synthesis of nickel nanoparticles. [ 29 ] This catalytic system showed reasonable catalytic performance in the reduction of 4‐NP. Another bulk hydrogel system prepared from homo‐polymerization of methacrylic acid was used as template for the in‐situ synthesis of nickel nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Poly(acrylic acid) hydrogel microparticles fabricated with silver nanoparticles: synthesis, characterization, and catalytic applications

Ajmal

Anwar

Naeem

et al. 2020

Polymer Engineering & Sci

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This work narrates the synthesis of poly (acrylic acid) hydrogel microparticles (PAAHMPs), fabrication of silver nanoparticles (AgNPs) inside the structure of the prepared PAAHMPs and catalytic applications of PAAHMPs fabricated with AgNPs (PAAHMPs/AgNPs). The PAAHMPs were prepared by inverse suspension polymerization technique while fabrication of AgNPs was carried out by chemical reduction method using sodium borohydride (NaBH 4) as reducing agent. The identification of functional groups in bare PAAHMPs and in the PAAHMPs/AgNPs composite system was carried out by the Fourier transform infrared spectroscopy. The size and morphology of the prepared hydrogel and its composite was studied by scanning electron microscopy and transmission electron microscopy. X-ray diffraction and thermal gravimetric analyzer was also used to characterize the bare PAAHMPs and PAAHMPs/ AgNPs composite. The prepared PAAHMPs/AgNPs composite was used as catalyst for the reduction of nitro aromatic pollutants and an industrial dye, that is, 4-Nitrophenol (4-NP), 2-Nitrophenol (2-NP) and methyl orange. No loss in catalytic activity was noted in seven consecutive cycles of recycling process while only 37.5% loss in catalytic activity was observed upon storing the catalyst for 90 days.

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“…The nano-nickel catalyst promotes the hydrogenation of toxic p-nitro phenol (p-Np) to the less toxic p-amino phenol (p-Ap). [21][22][23] Nickel is an efficient catalyst for several functional group transformation reactions, such as Knovenagel condensation, 24,25 Michael addition reactions, 26 and Suzuki coupling reactions. 27 Moreover, the magnetic property of nickel nanoparticles makes it more suitable as a catalyst due to its ease of separation and reusability.…”

Section: Introductionmentioning

confidence: 99%

Integrating thermodynamics towards bulk level synthesis of nano Ni catalysts: a green mediated sol–gel auto combustion method

2023

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Facile synthesis of porous anionic hydrogel embedded with nickel nanoparticles and evaluation of its catalytic performance for the rapid reduction of 4-nitrophenol

Cited by 27 publications

References 39 publications

Novel Ni/pHEMA-gr-PVP Composites Obtained by Polymerization with Simultaneous Metal Deposition: Structure and Properties

Novel Ni/pHEMA-gr-PVP Composites Obtained by Polymerization with Simultaneous Metal Deposition: Structure and Properties

Poly(acrylic acid) hydrogel microparticles fabricated with silver nanoparticles: synthesis, characterization, and catalytic applications

Integrating thermodynamics towards bulk level synthesis of nano Ni catalysts: a green mediated sol–gel auto combustion method

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