Polyaniline nanofiber/carbon dot nanohybrid as an efficient fluorimetric sensor for As (III) in water and effective antioxidant

Saikia, Aditi; Karak, Niranjan

doi:10.1016/j.mtcomm.2017.12.020

Cited by 47 publications

(28 citation statements)

References 38 publications

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“…However, in EPCI 1, the NH stretching band shifts to 3086 cm −1 , which indicates the interaction of the epoxy resin with the nanohybrid. Also, the appearance of –C=O stretch at 1723 cm −1 in PC shifts to 1736 cm −1 with higher intensity in EPCI designates a strong interaction with PC …”

Section: Resultsmentioning

confidence: 96%

“…The semicrystalline structure of PC showed XRD peaks at 2θ = 19° ( d ‐spacing = 6.32 Å) and 25° ( d‐ spacing = 3.55 Å). The PN showed peaks at 2θ =19° and 25° due to the parallel and perpendicular orientations for (110) and (003) planes of PN (JCPDS Reference Number: 53.1890 and 53.1891) . The (002) plane signifies the presence of CD in PC .…”

Section: Resultsmentioning

confidence: 99%

“…It was observed that the thermostability of epoxy thermoset improved after the incorporation of the nanomaterial [Figure (b,c)], which was varied with the PC loading. The improved thermostability of EPCI 0.50 and EPCI 1 thermosets can be attributed to the globular shape of the highly branched polymer with a large number of functionalities that offer good secondary interactions with PC resulting in high level of crosslinking density . This extremely crosslinked structure restricts the mobility of the molecules in the polymer chain, which results in more thermally stable moiety.…”

Section: Resultsmentioning

confidence: 99%

“…The PN and CD nanohybrid (PC) were prepared by the earlier reported method . The in situ epoxy/PC nanocomposites were also prepared with a slightly modified reported method .…”

Section: Methodsmentioning

confidence: 99%

“…The PN and CD nanohybrid (PC) were prepared by the earlier reported method. 19 The in situ epoxy/PC nanocomposites were also prepared with a slightly modified reported method. 13 Briefly, in a three-neck round bottom flask, BPA (5 g, 0.0219 mol), sorbitol (0.75 g, 0.00411 mol), and monoglyceride of castor oil (0.50 g, 0.00135 mol) were taken together.…”

Section: Fabrication Of Epoxy/polyaniline Nanofiber-carbon Dot Nanocomentioning

confidence: 99%

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Bio‐based epoxy/polyaniline nanofiber‐carbon dot nanocomposites as advanced anticorrosive materials

Saikia

Sarmah

Kumar

et al. 2019

J of Applied Polymer Sci

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Application of anticorrosive coating on metal surface enhances the durability of the metal. Anticorrosion can be achieved by the incorporation of conducting nanomaterials like polyaniline or its nanohybrid to a coating material. Thus, bio‐based epoxy nanocomposites were fabricated by the in situ method using polyaniline nanofiber‐carbon dot nanohybrid (0.50 and 1 wt % with respect to epoxy), as the anticorrosive material. The epoxy resin was obtained by polycondensation of bisphenol‐A, sorbitol, and monoglyceride of castor oil (mole ratio of 16:3:1), as hydroxyl compounds with epichlorohydrin (1:3 equivalent, hydroxyl:epichlorohydrin). The morphological analyses of the nanocomposites revealed the uniform dispersion and good compatibility of the nanohybrid in the epoxy matrix. The thermosets demonstrated good tensile strength (30 MPa), elongation at break (45%), scratch resistance (>10 kg) and impact resistance (14.75 kJ/m), good thermal stability (above 250°C), and chemical resistance. The anticorrosion study of the nanocomposites showed excellent corrosion protection efficiency (corrosion rate: 5.68 × 10−3 mils per year) in 3.5 wt % NaCl compared to the pristine epoxy system. Therefore, this bio‐based thermosetting epoxy nanocomposite was demonstrated as efficient anticorrosive material. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47744.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The PN and CD nanohybrid (PC) were prepared by the earlier reported method . The in situ epoxy/PC nanocomposites were also prepared with a slightly modified reported method .…”

Section: Methodsmentioning

confidence: 99%

Section: Fabrication Of Epoxy/polyaniline Nanofiber-carbon Dot Nanocomentioning

confidence: 99%

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Bio‐based epoxy/polyaniline nanofiber‐carbon dot nanocomposites as advanced anticorrosive materials

Saikia

Sarmah

Kumar

et al. 2019

J of Applied Polymer Sci

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Design of Fluorescent Carbon Dots (CDs) for the Selective detection of Metal‐Containing Ions

López‐Beltrán

Iriarte‐Mesa²,

Murru

et al. 2023

Chemistry A European J

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The pollution caused by heavy metals (HMs) may occur through both natural processes and anthropogenic activities and is found in complex media. The purpose of this review is to summarize the state-of-art of fluorescent CDs and the sensing applications in a systematic manner. This review intends to provide clues on the origin on the observed selectivity in chemiluminiscence sensors, which was until now a stated but unaddressed question, and still remains open for debate. Indeed, it is tempting to think that CDs possessing functional groups with soft bases at the surface are able to detect soft metal acids, while the opposite is to be suspected for hard acid-base pairs. However, the literature shows several examples where this trend does not hold. We found that such observation is explained by the involvement of dynamic quenching, which does not involve the formation of a nonfluorescent complex, as in the case of static quenching. We have provided an interpretation of published data that was not provided by the original authors and offer guidelines to enable the design of CDs to target ions in solution.

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Multi‐Analyte Sensitive Fluorophore Cross‐Linked Nanofibers Based Antimicrobial Surface Enabling Bacterial Detection and Their Usage as Crystal Growth Template

Dikmen,

Bütün

2023

Macro Materials & Eng

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In situ preparation of bifunctional thiazolo[5,4‐d]thiazole (TTz)‐based fluorophore cross‐linked nanofibers is successfully performed. These multifunctional nanofibers are used as both crystal growth template and antibacterial substrate that makes bacterial detection possible simultaneously. These highly fluorescent nanofibers act as optical sensors toward many analytes. The acid, base, and metal cation‐sensitive nature of the 2,5‐bis(4‐hydroxyphenyl)thiazolo[5,4‐d]thiazole (HPhTT) dye makes the prepared PVA nanofibers sensitive against these chemicals. Metal nanoparticles (MNPs) or metal oxide crystal formation occurs on the surface of nanofibers without any reducing agent. The strong interaction between metal cations and fluorophores results in crystal formation on the surface, which is named for the first time as “complexation‐triggered crystalization.” These dye cross‐linked and metal‐interacted nanofibers exhibit antibacterial effect against E. coli (ATCC 25922), S. aureus (ATCC 25923), P. aeruginosa (ATCC 27853), and E. faecalis (ATCC 25922) strains. Also, the emission wavelength change of nanofibers in bacterial contamination makes it possible to use smart nanofiber films for optical bacteria detection. These novel materials pave the way for new applications such as smart wound bands, optical sensors, and one‐step preparation of surface‐enhanced Raman spectroscopy substrate.

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Polyaniline nanofiber/carbon dot nanohybrid as an efficient fluorimetric sensor for As (III) in water and effective antioxidant

Cited by 47 publications

References 38 publications

Bio‐based epoxy/polyaniline nanofiber‐carbon dot nanocomposites as advanced anticorrosive materials

Bio‐based epoxy/polyaniline nanofiber‐carbon dot nanocomposites as advanced anticorrosive materials

Design of Fluorescent Carbon Dots (CDs) for the Selective detection of Metal‐Containing Ions

Multi‐Analyte Sensitive Fluorophore Cross‐Linked Nanofibers Based Antimicrobial Surface Enabling Bacterial Detection and Their Usage as Crystal Growth Template

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