Reduced graphene oxide-wrapped silver nanoparticles for applications in ultrasensitive colorimetric detection of Cr(<scp>vi</scp>) ions and the carbaryl pesticide

Minh, Phung Nhat; Tuan, Hoang Van; Dinh, Ngo Xuan; Hoang, Ong Van; Cương, Nguyễn Văn; Hop, Dang Thi Bich; Tuan, Tran Quoc; Khi, Nguyen Tien; Huy, Trần Quang; Le, Anh‐Tuan

doi:10.1039/d0nj00947d

Cited by 33 publications

(10 citation statements)

References 41 publications

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“…The corresponding linear regression equation could be well described as I 0 - I = 891.59lg[Cr 2 O 7 2– ] + 10777.21 with a correlation coefficient of 0.9986 (Figure b). Meanwhile, the achieved limit of detection (LOD) for the target Cr 2 O 7 2– was estimated to be 0.83 pM ( S / N = 3), which is far below the threshold level of 0.17 μM for Cr(VI) set by the World Health Organization (WHO). , As seen in Table S2, the ECL sensor that we proposed possessed a broader linear range and a lower detection limit compared with other reported sensors for Cr(VI) detection previously.…”

Section: Resultsmentioning

confidence: 99%

Aggregation-Induced Electrochemiluminescence of Tetraphenylbenzosilole Derivatives in an Aqueous Phase System for Ultrasensitive Detection of Hexavalent Chromium

Guo

Feng

et al. 2020

Anal. Chem.

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Herein, aggregation-induced electrochemiluminescence (AIECL) of tetraphenylbenzosilole derivatives in an aqueous phase system with the participation of a co-reactant was systematically investigated for the first time. All organics that we studied exhibit excellent stability and dramatically enhanced electrochemiluminescence (ECL) and photoluminescence (PL) emission when the water fraction increases. The influence of substituents in the structure of tetraphenylbenzosilole derivatives on AIECL performance was proved by fluorescence, cyclic voltammetry, and related theoretical calculation. Among them, 2,3-bis(4-cyanophenyl)-1,1-diphenyl-benzosilole (TPBS-C) with strong electron-withdrawing cyano groups exhibits the best ECL behavior with the highest ECL efficiency (184.36%). The strongest ECL emission of TPBS-C not only stems from the aggregated molecules that restrict the intramolecular motion of peripheral phenyl groups, which inhibits the nonradiative transition, but also comes from the fact that TPBS-C has the lowest reduction potential, and twice the reduction process of TPBS-C occurs to produce more anion radicals (TPBS-C· –). Significantly, the ECL sensor based on TPBS-C nanoaggregates exhibits excellent detection performance for toxic Cr(VI) with a wide linear range from 10–12 to 10–4 M and an extremely low detection limit of 0.83 pM. This work developed an efficient luminophore with unique AIECL properties and realized the ultrasensitive detection of Cr(VI) in the aqueous phase system.

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Section: Resultsmentioning

confidence: 99%

Aggregation-Induced Electrochemiluminescence of Tetraphenylbenzosilole Derivatives in an Aqueous Phase System for Ultrasensitive Detection of Hexavalent Chromium

Guo

Feng

et al. 2020

Anal. Chem.

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“…The research involved synthetization of Ag@rGO by a simple photochemical process with the GO nanosheets as both stabilizing and reducing agent. This system could susceptibly detect carbaryl with the lowest concentration of 42.000 nM [ 264 ].…”

Section: Various Classes Of Insecticides Detection By Optical Sensorsmentioning

confidence: 99%

Recent Advances on Detection of Insecticides Using Optical Sensors

Fauzi

Fen

Omar

et al. 2021

Sensors

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Insecticides are enormously important to industry requirements and market demands in agriculture. Despite their usefulness, these insecticides can pose a dangerous risk to the safety of food, environment and all living things through various mechanisms of action. Concern about the environmental impact of repeated use of insecticides has prompted many researchers to develop rapid, economical, uncomplicated and user-friendly analytical method for the detection of insecticides. In this regards, optical sensors are considered as favorable methods for insecticides analysis because of their special features including rapid detection time, low cost, easy to use and high selectivity and sensitivity. In this review, current progresses of incorporation between recognition elements and optical sensors for insecticide detection are discussed and evaluated well, by categorizing it based on insecticide chemical classes, including the range of detection and limit of detection. Additionally, this review aims to provide powerful insights to researchers for the future development of optical sensors in the detection of insecticides.

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“…10 In addition, an Ag@GO composite has also been successfully used for the selective detection of Cr(IV). 11 The selective sensing of Pb 2+ and As 3+ was achieved by using a GO-Au nanocomposite. 12,13 Silver nanoparticles (AgNPs) capped with functionalized ligands have been well exploited for the colorimetric sensing of various metal ions.…”

Section: ■ Introductionmentioning

confidence: 99%

Probing the Interaction of Heavy and Transition Metal Ions with Silver Nanoparticles Decorated on Graphene Quantum Dots by Spectroscopic and Microscopic Methods

2022

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We report a comprehensive study of the interaction of transition and heavy metal ions with graphene quantum dots-capped silver nanoparticles (AgGQDs) using different spectroscopic and microscopic techniques. High-resolution transmission electron microscopy studies show that the interaction of metal ions with AgGQDs leads to the formation of metal oxides, the formation of zerovalent metals, and the aggregation of Ag nanoparticles (AgNPs). The metal ions may interact with AgGQDs through selective coordination with -OH and -COOH functionalities, adsorption on the graphene moiety, and directly to AgNPs. For instance, the interaction of Cd2+ with AgGQDs altered the spherical shape of AgNPs into a chain-like structure. On the contrary, the formation of PbO is observed after the addition of Pb2+ to AgGQDs. Interestingly, the interaction of AgGQDs with Hg2+ results in the complete dissolution of Ag0 from the surface of GQDs and subsequent deposition of Hg0 on the graphene moiety of GQDs. Unlike transition metal ions, Cd2+, Pb2+, and Hg2+ can adsorb strongly on the graphene surface at the bridge, hollow, and top sites, respectively. This special interaction of heavy metal ions with the graphene surface would decide the mechanistic pathway in which the reaction proceeds. The transition metal ions Cu2+, Zn2+, Co3+, Mn2+, Ni2+, and Fe3+ induced the aggregation of AgNPs.

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Reduced graphene oxide-wrapped silver nanoparticles for applications in ultrasensitive colorimetric detection of Cr(vi) ions and the carbaryl pesticide

Abstract: The Ag@rGO nanohybrid can be used as a colorimetric sensing platform for ultrasensitive detection of Cr(vi) ions and the carbaryl pesticide.

Cited by 33 publications

References 41 publications

Aggregation-Induced Electrochemiluminescence of Tetraphenylbenzosilole Derivatives in an Aqueous Phase System for Ultrasensitive Detection of Hexavalent Chromium

Aggregation-Induced Electrochemiluminescence of Tetraphenylbenzosilole Derivatives in an Aqueous Phase System for Ultrasensitive Detection of Hexavalent Chromium

Recent Advances on Detection of Insecticides Using Optical Sensors

Probing the Interaction of Heavy and Transition Metal Ions with Silver Nanoparticles Decorated on Graphene Quantum Dots by Spectroscopic and Microscopic Methods

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