A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite

A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite

In this work, we report a simple but efficient voltammetric sensor for simultaneous detection of ponceau 4R and tartrazine based on TiO<sub>2</sub>/electro-reduced graphene oxide nanocomposites (TiO<sub>2</sub>/ErGO). TiO<sub>2</sub>/ErGO nanocomposites were prepa...

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Main Authors: Zirong Qin, Jinyan Zhang, Ying Liu, Jingtao Wu, Guangli Li, Jun Liu, Quanguo He
Format: Article
Language:English
Published: MDPI AG 2020-08-01
Series:Chemosensors
Subjects:
ponceau 4R
tartrazine
TiO<sub>2</sub>
electro-reduced graphene oxide
voltammetric sensor
Online Access:https://www.mdpi.com/2227-9040/8/3/70
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spelling doaj-32c473142a5e4898ad4093668369f7592020-11-25T03:54:35ZengMDPI AGChemosensors2227-90402020-08-018707010.3390/chemosensors8030070A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide NanocompositeZirong Qin0Jinyan Zhang1Ying Liu2Jingtao Wu3Guangli Li4Jun Liu5Quanguo He6College of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 412007, ChinaIn this work, we report a simple but efficient voltammetric sensor for simultaneous detection of ponceau 4R and tartrazine based on TiO<sub>2</sub>/electro-reduced graphene oxide nanocomposites (TiO<sub>2</sub>/ErGO). TiO<sub>2</sub>/ErGO nanocomposites were prepared by ultrasonically dispersing TiO<sub>2</sub> nanoparticles (TiO<sub>2</sub> NPs) into graphene oxide (GO) solution followed by a green in-situ electrochemical reduction. TiO<sub>2</sub> NPs were uniformly supported on ErGO nanoflakes, which provides a favorable interface for the adsorption and subsequent oxidation of target analytes. TiO<sub>2</sub>/ErGO showed remarkable electrocatalytic capacity for the oxidation of ponceau 4R and tartrazine, with minimized oxidation overpotentials and boosted adsorptive striping differential pulse voltammetric (AdSDPV) response peak currents. Under the optimal experimental conditions, the anodic peak currents of ponceau 4R and tartrazine increase linearly with the respective natural logarithm of concentrations from 0.01 to 5.0 μM. The detection limits (LOD = 3σ/s) for ponceau 4R and tartrazine are 4.0 and 6.0 nM, respectively. The extraordinary analytical properties of TiO<sub>2</sub>/ErGO/GCE are primarily attributed to the synergistic enhancement effect from ErGO nanoflakes and TiO<sub>2</sub> NPs. Moreover, the proposed TiO<sub>2</sub>/ErGO/GCE achieves reliable determination of ponceau 4R and tartrazine in orange juice with excellent selectively, reproducibility and stability. Together with simplicity, rapidness, and low cost, the proposed sensor demonstrates great potential for on-site detection of azo colorants.https://www.mdpi.com/2227-9040/8/3/70ponceau 4RtartrazineTiO<sub>2</sub>electro-reduced graphene oxidevoltammetric sensor
collection DOAJ
language English
format Article
sources DOAJ
author Zirong Qin
Jinyan Zhang
Ying Liu
Jingtao Wu
Guangli Li
Jun Liu
Quanguo He
spellingShingle Zirong Qin
Jinyan Zhang
Ying Liu
Jingtao Wu
Guangli Li
Jun Liu
Quanguo He
A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite
Chemosensors
ponceau 4R
tartrazine
TiO<sub>2</sub>
electro-reduced graphene oxide
voltammetric sensor
author_facet Zirong Qin
Jinyan Zhang
Ying Liu
Jingtao Wu
Guangli Li
Jun Liu
Quanguo He
author_sort Zirong Qin
title A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite
title_short A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite
title_full A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite
title_fullStr A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite
title_full_unstemmed A Simple but Efficient Voltammetric Sensor for Simultaneous Detection of Tartrazine and Ponceau 4R Based on TiO<sub>2</sub>/Electro-Reduced Graphene Oxide Nanocomposite
title_sort simple but efficient voltammetric sensor for simultaneous detection of tartrazine and ponceau 4r based on tio<sub>2</sub>/electro-reduced graphene oxide nanocomposite
publisher MDPI AG
series Chemosensors
issn 2227-9040
publishDate 2020-08-01
description In this work, we report a simple but efficient voltammetric sensor for simultaneous detection of ponceau 4R and tartrazine based on TiO<sub>2</sub>/electro-reduced graphene oxide nanocomposites (TiO<sub>2</sub>/ErGO). TiO<sub>2</sub>/ErGO nanocomposites were prepared by ultrasonically dispersing TiO<sub>2</sub> nanoparticles (TiO<sub>2</sub> NPs) into graphene oxide (GO) solution followed by a green in-situ electrochemical reduction. TiO<sub>2</sub> NPs were uniformly supported on ErGO nanoflakes, which provides a favorable interface for the adsorption and subsequent oxidation of target analytes. TiO<sub>2</sub>/ErGO showed remarkable electrocatalytic capacity for the oxidation of ponceau 4R and tartrazine, with minimized oxidation overpotentials and boosted adsorptive striping differential pulse voltammetric (AdSDPV) response peak currents. Under the optimal experimental conditions, the anodic peak currents of ponceau 4R and tartrazine increase linearly with the respective natural logarithm of concentrations from 0.01 to 5.0 μM. The detection limits (LOD = 3σ/s) for ponceau 4R and tartrazine are 4.0 and 6.0 nM, respectively. The extraordinary analytical properties of TiO<sub>2</sub>/ErGO/GCE are primarily attributed to the synergistic enhancement effect from ErGO nanoflakes and TiO<sub>2</sub> NPs. Moreover, the proposed TiO<sub>2</sub>/ErGO/GCE achieves reliable determination of ponceau 4R and tartrazine in orange juice with excellent selectively, reproducibility and stability. Together with simplicity, rapidness, and low cost, the proposed sensor demonstrates great potential for on-site detection of azo colorants.
topic ponceau 4R
tartrazine
TiO<sub>2</sub>
electro-reduced graphene oxide
voltammetric sensor
url https://www.mdpi.com/2227-9040/8/3/70
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