AuNPs/Neutral red-biofunctionalized graphene nanocomposite for nonenzymatic electrochemical detection of organophosphate via NO2 reduction

Singh, Manorama; Kashyap, Hemant K.; Singh, Puneet Kumar; Mahata, Suhasini; Vijai, K.; Rai, Ankita

doi:10.1016/j.snb.2019.03.131

Cited by 24 publications

(7 citation statements)

References 53 publications

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“…[ 11 ] The aromatic amine and CN groups of NR show a band at 1311 and 1219 cm −1 in the FTIR spectra of DFNS‐PDI‐NR, confirming the successful synthesis of DFNS‐PDI‐NR. [ 42 ] Similar FTIR analysis results have also been obtained for DFNS‐MDI‐NR.…”

Section: Resultssupporting

confidence: 74%

Dendritic Fibrous Nanosilica Hybrid Materials with Near‐Infrared Emission as Multifunctional Sensors for Toxic Pollutants

Chatterjee

Lou

Wang

et al. 2020

Advanced Sustainable Systems

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Two dendritic fibrous nanosilica (DFNS)‐based hybrid materials (DFNS‐PDI‐NR and DFNS‐MDI‐NR) with superior near‐infrared (NIR) emission are developed. Based on the J‐aggregate of neutral red (NR) modified on the surfaces of DFNS, the hybrid materials possess a narrow redshifted emission band at 866 nm compared with the monomeric NR dyes upon excitation in the visible region (575 nm). Significantly, integrating the robust support of DFNS and unique fluorescence properties of the aggregated NR dyes, DFNS‐PDI‐NR and DFNS‐MDI‐NR can serve as a novel type of multifunctional solid‐state chemosensors for the detection of various toxic pollutants including transition‐metal anions (Cr2O72− and MnO4−), nitrophenols, and acetone with turn‐off NIR‐fluorescence signals. The quenching phenomena of DFNS‐PDI‐NR and DFNS‐MDI‐NR toward various toxic pollutants are established by nonlinear bend upward Stern–Volmer fitting. Moreover, these materials can be further used as sensitive probe materials for the determination of Cr2O72− and MnO4− levels in various real water samples.

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Section: Resultssupporting

confidence: 74%

Dendritic Fibrous Nanosilica Hybrid Materials with Near‐Infrared Emission as Multifunctional Sensors for Toxic Pollutants

Chatterjee

Lou

Wang

et al. 2020

Advanced Sustainable Systems

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“…Low water solubility and high absorption coefficient impart long residual effect of OPs in soil. This allows the entry of OPs into food chain causing neurotoxicity to animals due to irreversible inhibition of acetyl cholinesterase (AChE) [4][5][6]. For such reasons, development of novel methods of detection of OPs has been the subject of investigation over decades.…”

Section: Introductionmentioning

confidence: 99%

Development of polyindole/tungsten carbide nanocomposite-modified electrodes for electrochemical quantification of chlorpyrifos

et al. 2019

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The present investigation deals with the development of a novel polymer nanocomposite (PNCs) electrodes for simple, selective and sensitive detection of chlorpyrifos (CHL). PNCs were developed using surfactant facilitated polymerization of indole using different concentrations (wt%) of WC ranging 5-30. Formation of PNCs was ascertained through diversified analytical methods. Electrodes were derived from PNCs over stainless steel substrate for electrochemical quantification of CHL. With concentration of WC, the DC conductivity (10 −2 × S/cm) of electrodes was increased ranging 3.54-0.75 at 313 K. Electrochemical impedance spectroscopy reveals well stability of electrodes in phosphate buffer (PBS, 0.1 M) at pH 7.4. The performance of electrodes towards detection and quantification of CHL was investigated through square wave voltammetry. Study reveals that detection and quantification of CHL were dependent on concentration of WC in nanocomposites. Square wave voltammetry reveals that the electrode derived from PNCs with 5 wt% of WC has rendered highest limits of detection and quantification of CHL (10 −8 mol/L) up to 5.94 and 18. This work describes a viable method of preparation of synergistic blend of WC in PIN matrix having high electrical conductivity, rapid electron shift, huge surface area and enhanced stability for fast and précised electrochemical detection of CHL.

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“…Regarding graphene, Ankita Rai et al 191 demonstrated the detection of methyl parathion, employing a material based on GO functionalized with neutral red (NR) and bovine serum albumin (BSA) via carbodiimide coupling, followed by decoration with AuNPs, resulting in the AuNPs/NR-BSA-GO material. In this material, BSA contributes with its bioactivity and, as well as graphene, works as a platform for functionalization with the redox molecules NR and AuNPs.…”

Section: Sensors Based On Non-biological Moleculesmentioning

confidence: 99%

“…Still based on AuNPs, Ankita Rai et al 191 demonstrated the detection of methyl parathion, employing a material based on GO functionalized with neutral red (NR) and bovine serum albumin (BSA) via carbodiimide coupling, followed by decoration with AuNPs, resulting in the AuNPs/NR-BSA-GO material, as illustrated in Fig. 16B.…”

Section: C-nano-based Platforms For Pesticide Sensingmentioning

confidence: 99%

Chemical safety using functionalized carbon nanomaterials: neutralization and detection of organophosphorus compounds

Fonsaca,

Hostert,

Zarbin

et al. 2024

J. Mater. Chem. A

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AuNPs/Neutral red-biofunctionalized graphene nanocomposite for nonenzymatic electrochemical detection of organophosphate via NO2 reduction

Cited by 24 publications

References 53 publications

Dendritic Fibrous Nanosilica Hybrid Materials with Near‐Infrared Emission as Multifunctional Sensors for Toxic Pollutants

Dendritic Fibrous Nanosilica Hybrid Materials with Near‐Infrared Emission as Multifunctional Sensors for Toxic Pollutants

Development of polyindole/tungsten carbide nanocomposite-modified electrodes for electrochemical quantification of chlorpyrifos

Chemical safety using functionalized carbon nanomaterials: neutralization and detection of organophosphorus compounds

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