Electrovalent chitosan functionalized methyl-orange/metal nanocomposites as chemosensors for toxic aqueous anions

Ejeromedoghene, Onome; Adewuyi, Sheriff; Amolegbe, Saliu Alao; Akinremi, Caroline A.; Moronkola, Bridget A.; Salaudeen, Taofeek

doi:10.1016/j.nanoso.2018.06.004

Cited by 14 publications

(6 citation statements)

References 34 publications

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“…The spectrum of CTS displayed broad and weak peaks at 3491−3385, 2926, 1635, 1383, and 1087 cm −1 , corresponding to the OH and NH (overlapping bands), CH 3 , amide (CO), NH (bend), and COC absorption bands, respectively. 29 However, these peaks were intensified upon interaction with Zr and Bi metal salts. 38 The intensified OH/NH bands were slightly red-shifted due to interfering hydrogen bonding.…”

Section: Resultsmentioning

confidence: 99%

“…The FT-IR spectra of CTS and the corresponding metal nanoparticles are shown in Figure . The spectrum of CTS displayed broad and weak peaks at 3491–3385, 2926, 1635, 1383, and 1087 cm –1 , corresponding to the OH and NH (overlapping bands), CH 3 , amide (CO), NH (bend), and COC absorption bands, respectively . However, these peaks were intensified upon interaction with Zr and Bi metal salts .…”

Section: Resultsmentioning

confidence: 99%

“…The chitosan-based metal nanoparticles were prepared according to our previous procedure with modification. , Briefly, chitosan (CTS) solutions were prepared by dissolving 1.0 g of CTS in 5% CA under magnetic stirring at 60 °C for 45 min to form a clear homogeneous solution, which was allowed to cool to room temperature. To a separate 20 mL of the CTS-CA solution, 0.01 M of the metal salts was added directly under stirring at 80 °C for 1 h. Furthermore, 10 mL of 1 M glucose solution was added drop-wisely and stirred for another 1 h to form the nanoparticles.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Facile Green Synthesis of New Chitosan-Metal Nanoparticles as Nano-Agrofungicide For The Preservation of Postharvest Cherry Fruits

Ejeromedoghene

Oladipo

Oderinde

et al. 2021

ACS Agric. Sci. Technol.

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In this work, chitosan in citric acid and ascorbic acid along with glucose solutions served as stabilizing and reducing agents of Bi and Zr nanometallic particles, respectively, to produce chitosan-ascorbic acid-bismuth/zirconium (CTS-AA-Bi)/(CTS-AA-Zi), and chitosan-citric acid-bismuth/zirconium (CTS-CA-Bi)/(CTS-CA-Zr) materials. Scanning electron microscopy (SEM) images revealed an irregular sheet-like and round-shaped morphologies attributed to CTS-AA-Bi and CTS-AA-Zr, respectively, with slight agglomeration. Moreover, the high-resolution transmission electron microscopy (HR-TEM) image confirmed the monoclinic polynanocrystalline phase of the materials as revealed by X-ray diffraction (XRD) with an average particle size of 76 nm. The as-prepared materials displayed significant antifungal activity against Botrytis cinerea, plausibly due to the sustainable release and attachment of Zr ions to the fungal cells, thereby generating pores on the cell, damaging the cell wall/membranes, and leading to cell death. A substantial antifungal effect was also observed with postharvested cherry fruits sprayed up to 10 d. This new nanoagrofungicide can be used to preserve postharvested fruits and vegetables against fungi attack.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Facile Green Synthesis of New Chitosan-Metal Nanoparticles as Nano-Agrofungicide For The Preservation of Postharvest Cherry Fruits

Ejeromedoghene

Oladipo

Oderinde

et al. 2021

ACS Agric. Sci. Technol.

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“…This conclusion is supported by previous research. 56 The QTMC UV−visible spectra (Figure 2b) showed distinct bands at 218, 290, and 360 nm, which differed significantly when compared to the native CTS absorption spectrum. Visual observation of reagent mixtures during magnetic stirring revealed the production of colloidal suspensions of QTMC-AgNPs (exhibiting a final dark solution).…”

Section: Characterizationmentioning

confidence: 96%

Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

Alli

Ejeromedoghene

Oladipo

et al. 2022

ACS Appl. Bio Mater.

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Quaternary Trimethyl Chitosan (QTMC) and QTMC-Silver Nanoparticles (QTMC-AgNPs) have been synthesized, characterized, and tested as antibacterial agents against Staphylococcus aureus, Escherichia coli, and two plant fungi (Sclerotium rolfsil and Fusarium oxysporum). The as-prepared water-soluble QTMC was in situ reacted with silver nitrate in the presence of clean compressed hydrogen gas (3 bar) as a reducing agent to produce QTMC-AgNPs. UV–vis, ATR-FTIR, HR-TEM/SEM, XPS, DLS, XRD, and TGA/DTG were employed to assess the optical response, morphology/size, surface chemistry, particle size distribution, crystal nature, and thermal stability of the synthesized QTMC-AgNPs, respectively. The as-prepared QTMC-AgNPs were quasi-spherical in shape with an average particle size of 12.5 nm, as determined by ImageJ software utilizing HR-TEM images and further validated by DLS analysis. The development of crystalline nanoparticles was confirmed by the presence of distinct and consistent lattice fringes with an approximate interplanar d-spacing of 2.04 nm in QTMC-AgNPs. The QTMC-AgNPs exhibited significant antibacterial activity with a clear zone of inhibition of 30 mm and 26 mm around the disks against E. coli and S. aureus, respectively. In addition, QTMC-AgNPs showed highly efficient antifungal activity with 100% and 76.67% growth inhibition against two plant pathogens, S. rolfsii and F. oxysporum, respectively, whereas QTMC revealed no impact. Overall, QTMC-AgNPs showed a promising therapeutic potential and,thus, can be considered for drug design rationale.

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“…Specifically, chitosan is one positively charged natural alkaline polysaccharides derived from chitin that shows nontoxic in both animals and humans with many unique biological characteristics, such as the remarkable bioadhesiveness to mucosal surfaces and the ability to open tight junctions in epithelial cells to strongly promote drug penetration and absorption (Van der Lubben et al, 2001;Panos et al, 2008;Abdolhi et al, 2017;Raza & Anwar, 2017;Eid et al, 2018;Ejeromedoghene et al, 2018;Manuja et al, 2018;Augustine et al, 2019;Dutta et al, 2019). Phospholipids are negatively charged lipid mixtures and act as the basic component of biofilms with various surface activities.…”

Section: Introductionmentioning

confidence: 99%

Self-Assembled chitosan/phospholipid nanoparticles: from fundamentals to preparation for advanced drug delivery

Gao

Sun

et al. 2020

Drug Delivery

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Electrovalent chitosan functionalized methyl-orange/metal nanocomposites as chemosensors for toxic aqueous anions

Cited by 14 publications

References 34 publications

Facile Green Synthesis of New Chitosan-Metal Nanoparticles as Nano-Agrofungicide For The Preservation of Postharvest Cherry Fruits

Facile Green Synthesis of New Chitosan-Metal Nanoparticles as Nano-Agrofungicide For The Preservation of Postharvest Cherry Fruits

Compressed Hydrogen-Induced Synthesis of Quaternary Trimethyl Chitosan-Silver Nanoparticles with Dual Antibacterial and Antifungal Activities

Self-Assembled chitosan/phospholipid nanoparticles: from fundamentals to preparation for advanced drug delivery

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