Surface plasmon resonance of gold nanoparticles as a colorimetric sensor for indirect detection of Cefixime

Masoudyfar, Zeinab; Elhami, Shahla

doi:10.1016/j.saa.2018.12.007

Cited by 23 publications

(3 citation statements)

References 29 publications

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“…Figure 7A shows the surface plasmon resonance absorbance maximum of aqueous dispersion of cit-AuNPs at 525 nm in the UV-visible spectrum confirming the spherical shape of isolated cit-AuNPs. [54][55][56] The size of the cit-AuNPs in the aqueous dispersion was measured as 23.3 ± 6.8 nm from the DLS measurement (Figure 7B). Therefore, the commercially available cit-AuNPs were almost 100 times smaller relative to the prepared AuSTs and were in a good state for comparative electrochemical studies.…”

Section: Characterization Of the Commercially Available Cit-aunpsmentioning

confidence: 99%

An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of N‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

Guin,

Lapiy,

Dempsey

2023

Electrochemical Science Adv

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Gold star (AuST), which is one of the important anisotropic gold structures, finds applications in catalysis, sensing, and photothermal therapy by virtue of its branches of high aspect ratio. The preparation of AuSTs can prove challenging as it requires stringent reaction condition(s) and solution composition including various chemical additives, which are not suitable for either disposal in the environment or use in health‐related studies. Furthermore, these chemical additives often cover the gold surface and hence cause interferences in the applications of AuSTs. In this work, we have reported a proof of concept for preparing AuSTs of monodispersed size on glassy carbon electrodes by developing a simple electrosynthesis method using an aqueous acid solution of chloroauric acid in the absence of any chemical additive, structure‐directing or surface‐protecting agent. This electrosynthesis strategy was developed by understanding the corresponding electrocrystallization mechanism and designing a suitable potentiostatic pulse strategy. The current response per unit area of the gold content for the oxidation of N‐Acetyl‐L‐cysteine was found to be superior on AuSTs compared to widely used citrate‐capped gold nanoparticles (cit‐AuNPs) and bare gold.

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Section: Characterization Of the Commercially Available Cit-aunpsmentioning

confidence: 99%

An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of N‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

Guin,

Lapiy,

Dempsey

2023

Electrochemical Science Adv

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“…Cefixime (CFX), an important β-lactam ring antibiotic, is mainly used to treat throat infections, gonorrhea, and pneumonia [1,2]. Advantages such as strong antibacterial activity and good efficacy have enabled the wide use of CFX in the treatment of diseases in humans, poultry, and aquaculture [3,4].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Cefixime Core–Shell Magnetic Nano-Molecularly Imprinted Materials

Zhang,

Mo,

Wang

et al. 2023

Polymers

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Novel core–shell magnetic molecularly imprinted polymers (MMIPs) were synthesized using the sol–gel method for the adsorption of cefixime (CFX). Fe3O4@SiO2 is the core, and molecularly imprinted polymers (MIPs) are the shell, which can selectively interact with CFX. The preparation conditions, adsorption kinetics, adsorption isotherms, selective adsorption ability, and reutilization performance of the MMIPs were investigated. The adsorption capacity of MMIPs for CFX was 111.38 mg/g, which was about 3.5 times that of MNIPs. The adsorption equilibrium time was 180 min. The dynamic adsorption experiments showed that the adsorption process of MMIPs to CFX conformed to the pseudo-second-order model. Through static adsorption study, the Scatchard analysis showed that MMIPs had two types of binding sites—the high-affinity binding sites and the low-affinity binding sites—while the Langmuir model fit the adsorption isotherms well (R2 = 0.9962). Cefepime and ceftiofur were selected as the structural analogs of CFX for selective adsorption studies; the adsorption of CFX by MMIPs was higher than that of other structural analogs; and the imprinting factors of CFX, cefepime, and ceftiofur were 3.5, 1.7, and 1.4, respectively. Furthermore, the MMIPs also showed excellent reusable performance.

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“…[36] This antibiotic is not only operative in treating an extensive range of bacterial infectious diseases but also can be utilized to prevent infection in the people undergoing severe surgical operations. [37] To the best of our knowledge, the photocatalytic degradation of CEF is limited to a few methods using NiO/nano-clinoptilolite, [36] nano α-Fe 2 O 3 /ZnO, [38] TiO 2 /nitrogen doped holey graphene hybrid [3] and nanocrystalline ZnO. [39] These procedures suffer from one or more of the following difficulties such as using large amounts of photocatalyst, loss of the photocatalyst during recycling, long periods, low amounts of the degradation efficiency, and most importantly the employment of detrimental light sources and complex photoreactors.…”

Section: Introductionmentioning

confidence: 99%

High Performance Magnetically Separable G‐C₃N₄/γ‐Fe₂O₃/TiO₂ Nanocomposite with Boosted Photocatalytic Capability towards the Cefixime Trihydrate Degradation under Visible‐Light

2020

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A magnetically separable g‐C3N4/γ‐Fe2O3/TiO2 nanocomposite is synthesized as an intensely effectual visible‐light‐driven photocatalyst. It is fully characterized by FT‐IR, XPS, XRD, VSM, DRS, SEM, TEM, BET, EDS, and elemental mapping techniques. Based on the Tauc plot of (αhν)2 vs. hυ, the value of band gap energy for g‐C3N4/γ‐Fe2O3/TiO2 is estimated to be 2.6 eV, which proves the high capability of the catalyst to enhance the photoinduced electron‐holes separation and improves its visible‐light photocatalytic performance. The high photocatalytic activity of this catalyst towards the cefixime trihydrate (CEF) degradation, under visible‐light radiation can be ascribed to the synergistic optical effects between g‐C3N4, γ‐Fe2O3, and TiO2. Using central composite design (CCD) based on response surface methodology (RSM), the maximum degradation efficiency of about 98 % was obtained at the optimal conditions comprising the CEF amount of 20 mg/L, photocatalyst value of 0.04 g/L, irradiation intensity of 9 W/m2, and pH of 5.5, at 90 min. Utilizing an innocuous visible‐light source, almost complete mineralization of CEF (based on TOC analysis), using a very low amount of photocatalyst, applying air as the oxidant, and convenient magnetic separation of the catalyst from the reaction media and its ease of recycling for at least seven consecutive runs are the major highlights of this protocol.

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Surface plasmon resonance of gold nanoparticles as a colorimetric sensor for indirect detection of Cefixime

Cited by 23 publications

References 29 publications

An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of N‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of N‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

Synthesis and Properties of Cefixime Core–Shell Magnetic Nano-Molecularly Imprinted Materials

High Performance Magnetically Separable G‐C₃N₄/γ‐Fe₂O₃/TiO₂ Nanocomposite with Boosted Photocatalytic Capability towards the Cefixime Trihydrate Degradation under Visible‐Light

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Surface plasmon resonance of gold nanoparticles as a colorimetric sensor for indirect detection of Cefixime

Cited by 23 publications

References 29 publications

An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of N‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

An additive‐free electrosynthesis of gold micro‐stars for sensitive electroanalysis of N‐Acetyl‐L‐cysteine compared to conventional gold nanoparticles

Synthesis and Properties of Cefixime Core–Shell Magnetic Nano-Molecularly Imprinted Materials

High Performance Magnetically Separable G‐C3N4/γ‐Fe2O3/TiO2 Nanocomposite with Boosted Photocatalytic Capability towards the Cefixime Trihydrate Degradation under Visible‐Light

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Resources

About

High Performance Magnetically Separable G‐C₃N₄/γ‐Fe₂O₃/TiO₂ Nanocomposite with Boosted Photocatalytic Capability towards the Cefixime Trihydrate Degradation under Visible‐Light