Silver-osmium core-shell nanoparticles: Synthesis and heterogeneous persulfate activator

Hejazi, Safiyah A.; Zaheer, Zoya; Kosa, Samia A.

doi:10.1016/j.matchemphys.2023.127927

Cited by 11 publications

(2 citation statements)

References 69 publications

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“…However, to activate APS at temperatures as low as room temperature, an additional activator such as N′,N′-tetramethyl ethylene diamine (TEMED) has to be used. Zerovalent transition metal nanoparticles such as iron, cobalt, and silver are also known to be used as persulfate activators in the following reactions (eq ): Ag 0 + S 2 O 8 2 − → Ag + + SO 4 2 − + SO 4 …”

Section: Resultsmentioning

confidence: 99%

Optimizing Silver Nanowire Synthesis for In-Body Applications

Cirit,

Akyuz,

Bilir

et al. 2024

ACS Appl. Nano Mater.

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This work presents a parametric study for optimizing the synthesis of silver nanowires (AgNWs) using a polyol method for inbody applications. The effects of various parameters, including reaction time, reaction temperature, and type of metal halide employed during synthesis, on the properties of the AgNWs are systematically investigated. The kinetics of AgNW formation are analyzed by temporal UV−vis spectroscopy and TEM. To elaborate on the complexity of the metal halide employed during the production of silver nanowires, we have conducted various sets of experiments, revealing the role of the metal in classical polyol synthesis. We have demonstrated that even though the stoichiometric ratio of Ag + /Cl − is kept constant, the type of halide source is directly related to the formation of high-yield silver nanowires. The AgNW/P(AAm-co-AAc-co-PEGDA) hydrogel synthesized with as-produced AgNWs demonstrates suitable mechanical and electrical properties for in-body sensors, particularly for pH monitoring. Its electrical behavior exhibits frequencydependent conductivity enhancements attributed to polarization mechanisms, but conductivity decreases with increasing pH due to ionization and structural changes within the hydrogel.

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Section: Resultsmentioning

confidence: 99%

Optimizing Silver Nanowire Synthesis for In-Body Applications

Cirit,

Akyuz,

Bilir

et al. 2024

ACS Appl. Nano Mater.

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“…The kinetic data was tested by using two types of kinetic models, namely, pseudo-second order kinetic, and intraparticle diffusion. 44 The contact time is an important parameter to determine the maximum adsorption efficiency by the as-prepared adsorbent. To evaluate the shaking time, adsorption kinetics of CTAB (492 mg/L) and orange II (500 mg/L) was evaluated with a fixed amount of loaded FeNPs (0.2 g/L) at 295 K. Kinetic results of the adsorption of CTAB and orange II onto are shown in Figure 2A.…”

Section: Sorption Kineticsmentioning

confidence: 99%

Cationic surfactant modified iron nanoparticles for removal of orange II in batch mode: Kinetics, isotherms, mechanistic, and thermodynamic approach

Al‐Thubaiti,

Khan

2024

Int J of Chemical Kinetics

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The interaction of cetyltrimethylammonium bromide (CTAB) with orange II has been studied spectrophotometrically. CTA‐Orange II complex was isolated from an aqueous solution with chloroform. The results indicate that the CTAB interacts in 1:1 stoichiometry with orange II. CTAB capped FeNPs were used as an adsorbent to the removal of CTA‐Orange II complex. Energy dispersive x‐ray spectroscope (EDX), Fourier transform infrared spectroscope (FTIR), surface scanning microscope (SEM), and transmission electron microscope (TEM) were used to determine the morphology of FeNPs. The effect of contact time, pH, and concentration of orange II were examined on the removal of dye and surfactant. The removal of orange II followed pseudo‐second‐order kinetic and Langmuir isotherm model. The maximum adsorption capacity (Qmax) of CTAB‐FeNPs for orange II was 1288.9 mg/g at 30°C. CTA‐Orange II complex was adsorbed onto the adsorbent through several types of interaction (e.g., electrostatic attractions, van der Waals interactions, hydrogen bonding and n‐π stacking interactions). The sorption of orange G was also studied at different CTAB concentrations. The results implied that the maximum sorption amount was almost half of the orange II adsorption. The findings reveal the feasibility of CTAB capped FeNPs to be used as an excellent and low‐cost adsorbent for the removal of various water pollutants, more specifically anionic dyes.

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