Hybrid cryogels composed of P(NIPAM-co-AMPS) and metal nanoparticles for rapid reduction of p-nitrophenol

Haleem, Abdul; Chen, Jun; Guo, Xiao; Wang, Jia-Yun; Li, Huijuan; Li, Pengyun; Chen, Shengqi; He, Wei‐Dong

doi:10.1016/j.polymer.2020.122352

Cited by 31 publications

(19 citation statements)

References 46 publications

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“…Au 26 , Ag 27 , Pd 28 , Co 29 , ZnO 30 , CeO 2 31 , TiO 2 32 etc. It is reported in most of the literature that Au, Ag and Pd nanoparticles were used to reduce 4-NP to 4-aminophenol 33 – 36 . The catalytic activities of gold, silver and palladium nanoparticles, impregnated in microgels, were studied 37 – 39 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of bimetallic nanoparticles loaded on to PNIPAM hybrid microgel and their catalytic activity

Kakar

Khan

Akram

et al. 2021

Sci Rep

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This study was designed to preparecarboxyl-functionalized poly (N-isopropylacrylamide) PNIPAM microgels having excellent catalytic properties.Recently, researchers are trying to fabricate cost effective and efficient hybrid catalytic materials for the synthesis of nitrogenous compounds along with enhanced optical properties. For the same motive, synthesis of carboxyl-functionalized PNIPAM microgels was performed by using polymerization of soap-free emulsion of N-isopropyl acrylamide, which is NIPAM along with acrylic acid (AA). The thiol group was introduced through the imide bond mediated by carbodiimide, between carboxyl-functionalized microgels through carboxyl group and aminoethanethiol (AET). Copper, Palladium and Cu/Pd nanoparticles were incorporated successfully into thiol-functionalized PNIPAM microgels through metals thiol linkage. The synthesized microgels and hybrid encompassing metallic nanoparticles were characterized in detail by using Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron (XPS) and Fourier transformed infrared spectroscopy for structural interpretation. The thermal properties of the pure and hybrid microgels were inspected by TG analysis. The prepared nanocomposites PNIPAM-Cu, PNIPAM-Pd and PNIPAM-Cu/Pd exhibited decent catalytic properties for the degradation of 4-Nitrophenol and methylene blue, but the bimetallic Cu/Pd have remarkable catalytic properties. The catalytic reaction followed pseudo-first-order reaction with rate constants 0.223 min−1, 0.173 min−1 for 4-Nitrophenol and methylene blue in that order. In this study,we were able to establish that Cu/Pd hybrid is an efficient catalyst for 4-Nitrophenol and methylene blue as compared to its atomic analogue.

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Section: Introductionmentioning

confidence: 99%

Synthesis of bimetallic nanoparticles loaded on to PNIPAM hybrid microgel and their catalytic activity

Kakar

Khan

Akram

et al. 2021

Sci Rep

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“…The stabilizing agents may also have specific new functions, such as detection, therapy, or vectorization. Potential agents include a wide variety of biomolecules, such as peptides [ 32 ], proteins [ 33 , 34 ], genetic material [ 35 , 36 ], antibodies [ 37 , 38 ], drugs [ 39 , 40 ], Raman reporters [ 41 , 42 ], fluorophores [ 26 , 43 ], polymers [ 44 , 45 , 46 ], and supramolecular complexes [ 47 ].…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Gold Nanostars with Cationic β-Cyclodextrin-Based Polymer for Drug Co-Loading and SERS Monitoring

et al. 2021

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Gold nanostars (AuNSs) exhibit modulated plasmon resonance and have a high SERS enhancement factor. However, their low colloidal stability limits their biomedical application as a nanomaterial. Cationic β-cyclodextrin-based polymer (CCD/P) has low cytotoxicity, can load and transport drugs more efficiently than the corresponding monomeric form, and has an appropriate cationic group to stabilize gold nanoparticles. In this work, we functionalized AuNSs with CCD/P to load phenylethylamine (PhEA) and piperine (PIP) and evaluated SERS-based applications of the products. PhEA and PIP were included in the polymer and used to functionalize AuNSs, forming a new AuNS-CCD/P-PhEA-PIP nanosystem. The system was characterized by UV–VIS, IR, and NMR spectroscopy, TGA, SPR, DLS, zeta potential analysis, FE-SEM, and TEM. Additionally, Raman optical activity, SERS analysis and complementary theoretical studies were used for characterization. Minor adjustments increased the colloidal stability of AuNSs. The loading capacity of the CCD/P with PhEA-PIP was 95 ± 7%. The physicochemical parameters of the AuNS-CCD/P-PhEA-PIP system, such as size and Z potential, are suitable for potential biomedical applications Raman and SERS studies were used to monitor PhEA and PIP loading and their preferential orientation upon interaction with the surface of AuNSs. This unique nanomaterial could be used for simultaneous drug loading and SERS-based detection.

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“…Thermal synthesis is based on a thermal reduction of silver salt. A representative example is the thermal reduction of AgNO 3 [59] in an environment of poly(N-isopropylacryamide-co-2 -acrylamido-2-methylpropane sulfonic acid) (NIPAMSA) to form the hybrid hydrogels with incorporated AgNPs. Figure 7, the green synthesis of AgNPs is based on using extracts from plants or fungi, which contain a giant spectrum of different oxidative and reductive agents.…”

Section: Synthesis Of Agnpsmentioning

confidence: 99%

“…AgNPs incorporated in poly(N-iospropylacryamide-co-acrylamido-2-methylpropane sulfonic acid) (NIPAMSA) cryogel were used for the reduction of 4-nitrophenol to 4-aminophenol [59]. AgNPs/starch/PEG/PAA hydrogel was created by Saberi et al for Hg 2+ removal.…”

Section: Agnps-hydrogelsmentioning

confidence: 99%

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Silver Nanomaterials for Wound Dressing Applications

et al. 2020

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Silver nanoparticles (AgNPs) have recently become very attractive for the scientific community due to their broad spectrum of applications in the biomedical field. The main advantages of AgNPs include a simple method of synthesis, a simple way to change their morphology and high surface area to volume ratio. Much research has been carried out over the years to evaluate their possible effectivity against microbial organisms. The most important factors which influence the effectivity of AgNPs against microorganisms are the method of their preparation and the type of application. When incorporated into fabric wound dressings and other textiles, AgNPs have shown significant antibacterial activity against both Gram-positive and Gram-negative bacteria and inhibited biofilm formation. In this review, the different routes of synthesizing AgNPs with controlled size and geometry including chemical, green, irradiation and thermal synthesis, as well as the different types of application of AgNPs for wound dressings such as membrane immobilization, topical application, preparation of nanofibers and hydrogels, and the mechanism behind their antimicrobial activity, have been discussed elaborately.

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Hybrid cryogels composed of P(NIPAM-co-AMPS) and metal nanoparticles for rapid reduction of p-nitrophenol

Cited by 31 publications

References 46 publications

Synthesis of bimetallic nanoparticles loaded on to PNIPAM hybrid microgel and their catalytic activity

Synthesis of bimetallic nanoparticles loaded on to PNIPAM hybrid microgel and their catalytic activity

Functionalization of Gold Nanostars with Cationic β-Cyclodextrin-Based Polymer for Drug Co-Loading and SERS Monitoring

Silver Nanomaterials for Wound Dressing Applications

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