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Ultrasensitive colorimetric determination of silver(I) based on the peroxidase mimicking activity of a hybrid material composed of graphitic carbon nitride and platinum nanoparticles

A hybrid material composed of graphitic carbon nitride (g-C 3 N 4 ) and platinum nanoparticles (PtNPs) with peroxidase mimicking activity was used to design a rapid, sensitive and low-cost colorimetric method for the determination of Ag(I). The g-C 3 N 4 -PtNPs hybrid was synthesized by reduction of... Full description

Journal Title: Microchimica Acta 2018, Vol.185(5), pp.1-7
Main Author: Tang, Shurong
Other Authors: Wang, Meili , Li, Guangwen , Li, Xin , Chen, Wei , Zhang, Lan
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0026-3672 ; E-ISSN: 1436-5073 ; DOI: 10.1007/s00604-018-2816-4
Link: http://dx.doi.org/10.1007/s00604-018-2816-4
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recordid: springer_jour10.1007/s00604-018-2816-4
title: Ultrasensitive colorimetric determination of silver(I) based on the peroxidase mimicking activity of a hybrid material composed of graphitic carbon nitride and platinum nanoparticles
format: Article
creator:
  • Tang, Shurong
  • Wang, Meili
  • Li, Guangwen
  • Li, Xin
  • Chen, Wei
  • Zhang, Lan
subjects:
  • Nanohybrid
  • Enzyme mimic
  • Tetramethylbenzidine
  • Colorimetric assay
  • Silver ions
  • Picomolar level detection
  • Water analysis
ispartof: Microchimica Acta, 2018, Vol.185(5), pp.1-7
description: A hybrid material composed of graphitic carbon nitride (g-C 3 N 4 ) and platinum nanoparticles (PtNPs) with peroxidase mimicking activity was used to design a rapid, sensitive and low-cost colorimetric method for the determination of Ag(I). The g-C 3 N 4 -PtNPs hybrid was synthesized by reduction of chloroplatinic acid using sodium borohydride under ultrasonication and in the presence of g-C 3 N 4 . The hybrid can catalyze the oxidation 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue-colored product with an absorption maximum at 652 nm. On addition of Ag(I) and in the presence of citric acid, it will be reduced to form Ag(0) under the catalytic action of PtNPs. Ag(0) is then adsorbed on the surface of the g-C 3 N 4 -PtNPs. This results in the inhibition of the enzyme mimetic activity of the hybrid. Hence, less blue product will be formed from TMB. Under optimum conditions, Ag(I) can be quantified in the 0.05–5.0 nM concentration range with a 22 pM detection limit. This assay is rapid and reliable and was applied to the determination of Ag(I) in spiked real water samples. Graphical abstract A hybrid nanomaterial consisting of graphitic carbon nitride and platinum nanoparticles (g-C 3 N 4 -PtNPs) can catalyze the oxidation of tetramethylbenzidine (TMB) to produce a blue-colored product (TMBox). The enzyme mimetic activity of the hybrid is inhibited by Ag + , thereby decreasing the generation of blue product from TMB.
language: eng
source:
identifier: ISSN: 0026-3672 ; E-ISSN: 1436-5073 ; DOI: 10.1007/s00604-018-2816-4
fulltext: fulltext
issn:
  • 1436-5073
  • 14365073
  • 0026-3672
  • 00263672
url: Link


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titleUltrasensitive colorimetric determination of silver(I) based on the peroxidase mimicking activity of a hybrid material composed of graphitic carbon nitride and platinum nanoparticles
creatorTang, Shurong ; Wang, Meili ; Li, Guangwen ; Li, Xin ; Chen, Wei ; Zhang, Lan
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subjectNanohybrid ; Enzyme mimic ; Tetramethylbenzidine ; Colorimetric assay ; Silver ions ; Picomolar level detection ; Water analysis
descriptionA hybrid material composed of graphitic carbon nitride (g-C 3 N 4 ) and platinum nanoparticles (PtNPs) with peroxidase mimicking activity was used to design a rapid, sensitive and low-cost colorimetric method for the determination of Ag(I). The g-C 3 N 4 -PtNPs hybrid was synthesized by reduction of chloroplatinic acid using sodium borohydride under ultrasonication and in the presence of g-C 3 N 4 . The hybrid can catalyze the oxidation 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue-colored product with an absorption maximum at 652 nm. On addition of Ag(I) and in the presence of citric acid, it will be reduced to form Ag(0) under the catalytic action of PtNPs. Ag(0) is then adsorbed on the surface of the g-C 3 N 4 -PtNPs. This results in the inhibition of the enzyme mimetic activity of the hybrid. Hence, less blue product will be formed from TMB. Under optimum conditions, Ag(I) can be quantified in the 0.05–5.0 nM concentration range with a 22 pM detection limit. This assay is rapid and reliable and was applied to the determination of Ag(I) in spiked real water samples. Graphical abstract A hybrid nanomaterial consisting of graphitic carbon nitride and platinum nanoparticles (g-C 3 N 4 -PtNPs) can catalyze the oxidation of tetramethylbenzidine (TMB) to produce a blue-colored product (TMBox). The enzyme mimetic activity of the hybrid is inhibited by Ag + , thereby decreasing the generation of blue product from TMB.
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titleUltrasensitive colorimetric determination of silver(I) based on the peroxidase mimicking activity of a hybrid material composed of graphitic carbon nitride and platinum nanoparticles
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abstractA hybrid material composed of graphitic carbon nitride (g-C 3 N 4 ) and platinum nanoparticles (PtNPs) with peroxidase mimicking activity was used to design a rapid, sensitive and low-cost colorimetric method for the determination of Ag(I). The g-C 3 N 4 -PtNPs hybrid was synthesized by reduction of chloroplatinic acid using sodium borohydride under ultrasonication and in the presence of g-C 3 N 4 . The hybrid can catalyze the oxidation 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue-colored product with an absorption maximum at 652 nm. On addition of Ag(I) and in the presence of citric acid, it will be reduced to form Ag(0) under the catalytic action of PtNPs. Ag(0) is then adsorbed on the surface of the g-C 3 N 4 -PtNPs. This results in the inhibition of the enzyme mimetic activity of the hybrid. Hence, less blue product will be formed from TMB. Under optimum conditions, Ag(I) can be quantified in the 0.05–5.0 nM concentration range with a 22 pM detection limit. This assay is rapid and reliable and was applied to the determination of Ag(I) in spiked real water samples. Graphical abstract A hybrid nanomaterial consisting of graphitic carbon nitride and platinum nanoparticles (g-C 3 N 4 -PtNPs) can catalyze the oxidation of tetramethylbenzidine (TMB) to produce a blue-colored product (TMBox). The enzyme mimetic activity of the hybrid is inhibited by Ag + , thereby decreasing the generation of blue product from TMB.
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