A Novel Nanofibrous Film Chemosensor for Highly Selective and Sensitive Optical Signaling of Zn2+

Zhou, Chen; Liu, Heng

doi:10.21577/0103-5053.20170036

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…The presence of a Si-O-C peak observed at approximately 1240 cm -1 , along with the aforementioned peaks, provides evidence of the attachment of an amino linker to the luffa structure, as reported in previous studies [29]. Moreover, the C = N peak observed at 1634 cm -1 provides evidence of the binding of salicylic aldehyde to 4-aminopropyl triethoxysilane, which forms an imine group [30]. The vibrational peaks associated with the stretching of C = C bonds in the aromatic ring of salicylic aldehyde are visible at approximately 1634 cm -1 and 756 cm -1 .…”

Section: Characterizationsupporting

confidence: 82%

Enhanced Adsorption of Ketoprofen and Reactive Yellow 15 from Aqueous Solutions Using Silver Nanoparticle-Modified Luffa: Characterization, Optimization, and Reusability Studies

Tavassoli,

Cheraghi,

Etemadifar

et al. 2023

Preprint

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In the current work, luffa was modified with silver nanoparticles to prepare LF/AgNPs adsorbent for the elimination of ketoprofen and reactive yellow 15 (RY15) from aqueous media. Various characterization techniques, including FTIR, XRD, and SEM-EDS analyses, were employed to confirm the successful modification of LF/AgNPs. Several key parameters such as contact time, adsorbent dosage, concentration, pH, and agitation technique were fine-tuned to optimize the adsorption process. Ketoprofen removal was found to be most effective in weakly acidic conditions (pH=5), while reactive yellow 15 adsorption was enhanced in an acidic environment (pH=2). At 298 K, the highest adsorption capacities reached 56.88 mg/g for ketoprofen and 97.76 mg/g for reactive yellow 15. The adsorption of ketoprofen followed the Temkin isotherm model, indicating a chemisorption process (R2=0.997). Reactive yellow 15, however, adhered to the Freundlich isotherm model, suggesting multilayer adsorption due to uneven distribution of active sites (R2=0.987). Additionally, the kinetics of ketoprofen adsorption were best described by the Pseudo-first order model (R2=0.989), whereas the Pseudo-second order model provided the most accurate fit for reactive yellow 15 adsorption (R2=0.997). Importantly, the LF/AgNPs adsorbent displayed consistent performance over five consecutive reuse cycles, affirming its stability and efficacy in removing both contaminants. These findings underscore the exceptional potential of LF/AgNPs as a reliable adsorbent for the removal of reactive yellow 15 and ketoprofen from aqueous solutions.

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Section: Characterizationsupporting

confidence: 82%

Enhanced Adsorption of Ketoprofen and Reactive Yellow 15 from Aqueous Solutions Using Silver Nanoparticle-Modified Luffa: Characterization, Optimization, and Reusability Studies

Tavassoli,

Cheraghi,

Etemadifar

et al. 2023

Preprint

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“…Moreover, a significant transmittance of ~70% at around 540 nm [42] and ~90% at around 550 nm [43] was observed for the ZnS layer thickness of 64 and 40 nm, respectively. The broad minimum at around 500 nm in the reflectance spectra of un-annealed ZnS was most probably related with the absorption of the light by Zn 2+ ions [44,45,46,47]. After annealing of the samples, the reflectance dip shifted to the UV region and became more narrow, with the reflectance values close to zero.…”

Section: Resultsmentioning

confidence: 99%

Structural and Optical Characterization of ZnS Ultrathin Films Prepared by Low-Temperature ALD from Diethylzinc and 1.5-Pentanedithiol after Various Annealing Treatments

et al. 2019

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The structural and optical evolution of the ZnS thin films prepared by atomic layer deposition (ALD) from the diethylzinc (DEZ) and 1,5-pentanedithiol (PDT) as zinc and sulfur precursors was studied. A deposited ZnS layer (of about 60 nm) is amorphous, with a significant S excess. After annealing, the stoichiometry improved for annealing temperatures ≥400 °C and annealing time ≥2 h, and 1:1 stoichiometry was obtained when annealed at 500 °C for 4 h. ZnS crystallized into small crystallites (1–7 nm) with cubic sphalerite structure, which remained stable under the applied annealing conditions. The size of the crystallites (D) tended to decrease with annealing temperature, in agreement with the EDS data (decreased content of both S and Zn with annealing temperature); the D for samples annealed at 600 °C (for the time ≤2 h) was always the smallest. Both reflectivity and ellipsometric spectra showed characteristics typical for quantum confinement (distinct dips/peaks in UV spectral region). It can thus be concluded that the amorphous ZnS layer obtained at a relatively low temperature (150 °C) from organic S precursor transformed into the layers built of small ZnS nanocrystals of cubic structure after annealing at a temperature range of 300–600 °C under Ar atmosphere.

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“…The presence of a Si-O-C peak observed at approximately 1240 cm −1 , along with the aforementioned peaks, provides evidence of the attachment of an amino linker to the luffa structure, as reported in previous studies 60 . Moreover, the C=N peak observed at 1634 cm −1 provides evidence of the binding of salicylic aldehyde to 4-aminopropyl triethoxysilane, which forms an imine group 61 . The vibrational peaks associated with the stretching of C=C bonds in the aromatic ring of salicylic aldehyde are visible at approximately 1634 cm −1 and 756 cm −1 .…”

Section: Characterizationmentioning

confidence: 99%

Optimization and characterization of silver nanoparticle-modified luffa for the adsorption of ketoprofen and reactive yellow 15 from aqueous solutions

Tavassoli,

Cheraghi,

Etemadifar

et al. 2024

Sci Rep

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In the current work, luffa was modified with silver nanoparticles to prepare LF/AgNPs adsorbent for the elimination of ketoprofen and reactive yellow 15 (RY15) from aqueous media. Various characterization techniques, including FT-IR, XRD, BET, and SEM–EDS analysis, were employed to confirm the successful modification of LF/AgNPs. Several key parameters such as contact time, adsorbent dosage, concentration, pH, and agitation technique were fine-tuned to optimize the adsorption process. Ketoprofen removal was found to be most effective in weakly acidic conditions (pH = 5), while reactive yellow 15 adsorption was enhanced in an acidic environment (pH = 2). At 298 K, the highest adsorption capacities reached 56.88 mg/g for ketoprofen and 97.76 mg/g for reactive yellow 15. In both scenarios involving the elimination of ketoprofen and RY15, the Temkin isotherm exhibits higher R2 values, specifically 0.997 for ketoprofen and 0.963 for RY15, demonstrating a strong correlation with the observed adsorption data. Additionally, the kinetics of ketoprofen adsorption were best described by the Pseudo-first order model (R2 = 0.989), whereas the Pseudo-second order model provided the most accurate fit for reactive yellow 15 adsorption (R2 = 0.997). Importantly, the LF/AgNPs adsorbent displayed consistent performance over five consecutive reuse cycles, affirming its stability and efficacy in removing both contaminants. These findings underscore the exceptional potential of LF/AgNPs as a reliable adsorbent for the removal of reactive yellow 15 and ketoprofen from aqueous solutions.

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A Novel Nanofibrous Film Chemosensor for Highly Selective and Sensitive Optical Signaling of Zn2+

Cited by 4 publications

References 16 publications

Enhanced Adsorption of Ketoprofen and Reactive Yellow 15 from Aqueous Solutions Using Silver Nanoparticle-Modified Luffa: Characterization, Optimization, and Reusability Studies

Enhanced Adsorption of Ketoprofen and Reactive Yellow 15 from Aqueous Solutions Using Silver Nanoparticle-Modified Luffa: Characterization, Optimization, and Reusability Studies

Structural and Optical Characterization of ZnS Ultrathin Films Prepared by Low-Temperature ALD from Diethylzinc and 1.5-Pentanedithiol after Various Annealing Treatments

Optimization and characterization of silver nanoparticle-modified luffa for the adsorption of ketoprofen and reactive yellow 15 from aqueous solutions

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