Preparation and properties of silica-coated metallic nickel particles

Tago, Airi; Yanase, Masato; Yamauchi, Noriko; Nakashima, Kouichi; Nagao, Daisuke; Kobayashi, Yoshio

doi:10.1016/j.colsurfa.2021.127524

Cited by 11 publications

(2 citation statements)

References 46 publications

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“…SiO 2 nanoparticles were synthesized using TEOS (1) as a precursor with the help of modified Stöber process [38,39]. The detailed procedure of SiO 2 preparation is given in our previous publication [40] (Scheme 1).…”

Section: Synthesis Of Nano-composites Of Sio 2 (2)mentioning

confidence: 99%

Sulfonamide functionalized silica nano-composite: characterization and fluorescence “turn-on” detection of Fe3+ ions in aqueous samples

Ekta

Utreja

2023

Photochem Photobiol Sci

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We have synthesized novel sulfonamide-based nano-composite (SAN) for selective and sensitive detection of Fe 3+ ions in aqueous samples. Morphological characterization of SAN was carried out with TGA, FT-IR, UV-Vis, ninhydrin assay, FE-SEM, pXRD, BET, EDX, and elemental analysis. The sensing nature, effect of pH, sensor concentration and response time analysis were accomplished with the help of emission spectral studies and SAN was assessed as "turn-on" emission detector for the biologically important Fe 3+ ions. Here, the LOD and LOQ were computed to be 26.68 nM and 88.93 nM, respectively, and it was found to be much lower than the permissible limit of Fe 3+ ions in drinking water. The accuracy of the sensor (SAN) was determined by testing the aqueous samples spiked with known concentrations of Fe 3+ ions and results demonstrated 98.00-99.66% recovery, which made SAN a reliable, selective and sensitive chemosensor for the quantification of Fe 3+ ions in fully aqueous media.

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Section: Synthesis Of Nano-composites Of Sio 2 (2)mentioning

confidence: 99%

Sulfonamide functionalized silica nano-composite: characterization and fluorescence “turn-on” detection of Fe3+ ions in aqueous samples

Ekta

Utreja

2023

Photochem Photobiol Sci

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“…To analyze small microencapsulated products, the precise and accurate analytical methods such as inductively coupled plasma mass spectrometry (ICP-OES), inductively coupled plasma optical emission spectrometry (ICP-OES), time of flight secondary ion mass spectrometry (ToF-SIMS), scanning electronic microscope (SEM), and others are the most appreciated [ 4 , 5 ]. In samples such as microencapsulated active silver species, very small changes in the concentration of encapsulating components can have a significant impact on the property of materials.…”

Section: Introductionmentioning

confidence: 99%

ICP-MS Determination of Antimicrobial Metals in Microcapsules

et al. 2022

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Silver (Ag) and zinc (Zn) are very powerful antimicrobial metals. Therefore, in this research, a high-throughput, sensitive, and rapid method was developed for the determination of Ag and Zn in microcapsules using inductively coupled plasma mass spectrometry (ICP-MS). The sample preparation procedure employed simple microwave digestion of the microcapsules with 55.55% v/v HNO3 and 44.45% v/v H2O2. The method was applied to determine Ag and Zn in microcapsule samples of different sizes (120 and 450 μm) after their preparation with and without chitosan. Prepared microcapsules, after characterization, were bonded to a polymer carrier by sol-gel procedure and the materials were characterized by FTIR spectroscopy and high-resolution optical microscopy. Significant differences were found in Ag and Zn levels between microcapsules samples prepared with and without chitosan. The results have shown that samples with chitosan had up to 20% higher levels of Zn than Ag: 120 μm microcapsules contained 351.50 μg/g of Ag and 85.51 μg/g of Zn, respectively. In contrast, samples prepared without chitosan showed larger overall variability: In microcapsules with a diameter of 120 μm, the amounts of antimicrobial metals were 98.32 μg/g of Ag and 106.75 μg of Zn, respectively. Moreover, 450 μm microcapsules contained 190.98 μg/g of Ag and 121.35 μg/g of Zn. Those quantities are high enough for efficient antimicrobial activity of newly prepared microcapsules, enabling the application of microcapsules in different antimicrobial coatings.

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Silica coatings: From nanostructures to biological entities

Crucho

2024

Applied Materials Today

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Preparation and properties of silica-coated metallic nickel particles

Cited by 11 publications

References 46 publications

Sulfonamide functionalized silica nano-composite: characterization and fluorescence “turn-on” detection of Fe3+ ions in aqueous samples

Sulfonamide functionalized silica nano-composite: characterization and fluorescence “turn-on” detection of Fe3+ ions in aqueous samples

ICP-MS Determination of Antimicrobial Metals in Microcapsules

Silica coatings: From nanostructures to biological entities

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