Enhancing electrochemical sensing through the use of functionalized graphene composites as nanozymes

Dinu, Livia Alexandra; Kurbanoglu, Sevinc

doi:10.1039/d3nr01998e

Cited by 7 publications

(3 citation statements)

References 168 publications

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“… 48 Nanozymes derived from graphene exhibit intrinsic nanomaterial characteristics that not only serve as a straightforward alternative to enzymes but also provide a versatile platform capable of sensing analytes in intricate biochemical surroundings. 49 MoS 2 /MWCNT porous nanohybrid structured nanozymes possessed oxidase-like properties and were used for the detection of carbendazim. 50 Apart from nanozyme-based sensors, there are various types of electrochemical sensors.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical sensing of B-complex vitamins: current challenges and future prospects with microfluidic integration

Pakeeza,

Draz,

Yaqub

et al. 2024

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

Electrochemical sensing of B-complex vitamins: current challenges and future prospects with microfluidic integration

Pakeeza,

Draz,

Yaqub

et al. 2024

RSC Adv.

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“…In recent years, graphene and metal nanoparticle-decorated graphene have garnered significant attention in the field of electrochemical sensing, particularly for their unique properties which enhance sensitivity and conductivity [ 46 ]. Graphene, a single layer of carbon atoms arranged in a hexagonal lattice, exhibits excellent electrical conductivity, a large surface area, and remarkable mechanical strength [ 47 ].…”

Section: Introductionmentioning

confidence: 99%

“…Graphene, a single layer of carbon atoms arranged in a hexagonal lattice, exhibits excellent electrical conductivity, a large surface area, and remarkable mechanical strength [ 47 ]. When decorated with metal nanoparticles, such as gold nanoparticles (AuNPs), the resulting nanocomposite combines the inherent properties of graphene with the catalytic activity and stability of the metal nanoparticles [ 46 ]. Gold nanoparticles, in particular, contribute to improved electron transfer kinetics and enhanced surface area, making them ideal candidates for modifying electrodes in electrochemical sensors [ 48 ].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Detection of Glyphosate in Surface Water Samples Based on Modified Screen-Printed Electrodes

Geana,

Ciucure,

Soare

et al. 2024

Nanomaterials

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This study addresses the necessity to monitor the presence of glyphosate (Gly) in waters, highlighting the need for on-site detection of Gly by using electrochemical sensors in environmental and agricultural monitoring programs. Two approaches were employed: (1) modification with graphene decorated with gold nanoparticles (AuNPs-Gr) and dispersed in either dimethylformamide (DMF) or a solution containing Nafion and isopropanol (NAF), and (2) molecularly imprinted polymers (MIPs) based on polypyrrole (PPy) deposited on gold SPEs (AuSPE). Electrochemical characterization revealed that sensors made of AuNPs-Gr/SPCE exhibited enhanced conductivity, larger active area, and improved charge transfer kinetics compared to unmodified SPEs and SPEs modified with graphene alone. However, the indirect detection mechanism of Gly via complex formation with metallic cations in AuNPs-Gr-based sensors introduces complexities and compromises sensitivity and selectivity. In contrast, MIPPy/AuSPE sensors demonstrated superior performance, offering enhanced reliability and sensitivity for Gly analysis. The MIPPy/AuSPE sensor allowed the detection of Gly concentrations as low as 5 ng/L, with excellent selectivity and reproducibility. Moreover, testing in real surface water samples from the Olt River in Romania showed recovery rates ranging from 90% to 99%, highlighting the effectiveness of the detection method. Future perspectives include expanding the investigation to monitor Gly decomposition in aquatic environments over time, providing insights into the decomposition’s long-term effects on water quality and ecosystem health, and modifying regulatory measures and agricultural practices for mitigating its impact. This research contributes to the development of robust and reliable electrochemical sensors for on-site monitoring of Glyphosate in environmental and agricultural settings.

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Advancing Aquatic Food Safety Detection Using Highly Sensitive Graphene Oxide and Reduced Graphene Oxide (GO/r-GO) Fluorescent Sensors

Chen,

Cheng,

et al. 2024

Food Eng Rev

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With the increasing demand for aquatic products, the requirement for the safety detection of aquatic products is also increasing. In the past decade, graphene oxide (GO) and reduced graphene oxide (r-GO) have become hot topics in many fields due to their special physical and chemical properties. With their excellent conductivity, a variety of electrochemical sensors have been developed in the fields of biology, food and chemistry. However, the unique optical properties of GO/r-GO have not yet been widely utilized. With the deepening of research, the fluorescence quenching performance of GO/r-GO has been proven to have excellent potential for building fluorescent sensors, and GO/r-GO fluorescent sensors have thus become an inevitable trend in sensor development. This review summarizes the main preparation methods of GO/r-GO and the principles of GO/r-GO fluorescent sensors comprehensively. Additionally, recent advances in utilizing GO/r-GO fluorescent sensors to detect aquatic food are discussed, including the application for the detection of harmful chemicals, microorganisms, and endogenous substances in aquatic products, such as pesticides, antibiotics and heavy metals. It is hoped that this review will help accelerate the progress in the field of analysis, and promote the establishment of an aquatic food supervision system.

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Enhancing electrochemical sensing through the use of functionalized graphene composites as nanozymes

Abstract: + Different categories of artificial enzymes (nanozymes) according to the type of graphene derivative.

Cited by 7 publications

References 168 publications

Electrochemical sensing of B-complex vitamins: current challenges and future prospects with microfluidic integration

Electrochemical sensing of B-complex vitamins: current challenges and future prospects with microfluidic integration

Electrochemical Detection of Glyphosate in Surface Water Samples Based on Modified Screen-Printed Electrodes

Advancing Aquatic Food Safety Detection Using Highly Sensitive Graphene Oxide and Reduced Graphene Oxide (GO/r-GO) Fluorescent Sensors

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