Detection of formaldehyde by cyclic voltammetry using a PANI/GO composite film–modified electrode

Wang, Yanfang; Liu, De Li; Han, Jia-Jun; Guo, Ao-Ran

doi:10.1007/s11581-022-04499-2

Cited by 9 publications

(4 citation statements)

References 37 publications

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“…It was found that the specific surface area of PANI/GO-Azo was 30.33 m 2 /g. These results were compared with the reported literature of PANI and PANI/GO which exhibited surface areas of 13.33 and 14.44 m 2 /g, respectively . According to the Barrett–Joyner–Halenda (BJH) pore size analysis, it was observed that most of the pores present in PANI/GO-Azo are of mesoporous configuration, which ranges between 2 and 20 nm (Figure c).…”

Section: Resultsmentioning

confidence: 71%

“…These results were compared with the reported literature of PANI and PANI/GO which exhibited surface areas of 13.33 and 14.44 m 2 /g, respectively. 67 According to the Barrett−Joyner−Halenda (BJH) pore size analysis, it was observed that most of the pores present in PANI/GO-Azo are of mesoporous configuration, which ranges between 2 and 20 nm (Figure 3c). These large mesopores help in providing better ionic transportation, thereby facilitating the formation of an electrical double layer.…”

Section: Structure Of Pani/go-azo Nanocompositementioning

confidence: 99%

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Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Baby,

Sunny,

Vigneshwaran

et al. 2023

ACS Appl. Energy Mater.

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Electronically conducting polymers (ECPs)/carbon nanomaterialbased polyaniline electrodes have received great interest in the field of supercapacitors due to their high specific capacitance, good electronic conductivity, good mechanical strength, good chemical and electrochemical stabilities, etc. Among the various available ECPs, they have received much importance due to their excellent electrochemical performances. Herein, we report a facile synthesis of a PANI-grafted graphene oxide (GO)-azopyridine (Azo) (PANI/GO-Azo) nanocomposite and use it as electrodes for fabricating supercapacitors. The azo units present in the nanocomposite act as a spacer between PANI and GO. The interfacial polymerization method is adopted for the synthesis of PANI/GO-Azo nanocomposites. The PANI/ GO-Azo nanocomposite electrode exhibits a gravimetric capacitance of 426 F g −1 at a current density of 0.25 A g −1 in 1 M H 2 SO 4 (aqueous) electrolyte. The electrode possesses good cycling stability of more than 5000 cycles with a Coulombic efficiency of 98.5%. An asymmetric supercapacitor fabricated with PANI/GO-Azo as the positive electrode and activated carbon as the negative electrode delivers an energy density of 12.45 W h kg −1 with a power density of 274.9 W kg −1 . This study proclaims that the PANI/GO-Azo nanocomposite electrode is highly promising for next-generation supercapacitors.

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Section: Resultsmentioning

confidence: 71%

Section: Structure Of Pani/go-azo Nanocompositementioning

confidence: 99%

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Baby,

Sunny,

Vigneshwaran

et al. 2023

ACS Appl. Energy Mater.

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“…CV was used to characterize working electrodes as well as the stage of catechin detection in the solution prepared with pure substance and in the solutions prepared with the real samples. The method is very suitable for these tests and provides valuable information on the electrochemical behavior of the substance under analysis [ 99 ]. The potential range was optimized, being between −0.4 and +0.7 V, and the scan rate varied from 0.1 to 1.0 V·s −1 .…”

Section: Methodsmentioning

confidence: 99%

Assessment of the Antioxidant Activity of Catechin in Nutraceuticals: Comparison between a Newly Developed Electrochemical Method and Spectrophotometric Methods

Munteanu

Apetrei

2022

IJMS

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The analysis of antioxidants in different foodstuffs has become an active area of research, which has led to many recently developed antioxidant assays. Many antioxidants exhibit inherent electroactivity, and, therefore, the use of electrochemical methods could be a viable approach for evaluating the overall antioxidant activity of a matrix of nutraceuticals without the need for adding reactive species. Green tea is believed to be a healthy beverage due to a number of therapeutic benefits. Catechin, one of its constituents, is an important antioxidant and possesses free radical scavenging abilities. The present paper describes the electrochemical properties of three screen-printed electrodes (SPEs), the first one based on carbon nanotubes (CNTs), the second one based on gold nanoparticles (GNPs) and the third one based on carbon nanotubes and gold nanoparticles (CNTs-GNPs). All three electrodes were modified with the laccase (Lac) enzyme, using glutaraldehyde as a cross-linking agent between the amino groups on the laccase and aldehyde groups of the reticulation agent. As this enzyme is a thermostable catalyst, the performance of the biosensors has been greatly improved. Electro-oxidative properties of catechin were investigated using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), and these demonstrated that the association of CNTs with GNPs significantly improved the sensitivity and selectivity of the biosensor. The corresponding limit of detection (LOD) was estimated to be 5.6 × 10−8 M catechin at the CNT-Lac/SPE, 1.3 × 10−7 M at the GNP-Lac/SPE and 4.9 × 10−8 M at the CNT-GNP-Lac/SPE. The biosensors were subjected to nutraceutical formulations containing green tea in order to study their catechin content, using CNT-GNP-Lac/SPE, through DPV. Using a paired t-test, the catechin content estimated was in agreement with the manufacturer’s specification. In addition, the relationship between the CNT-GNP-Lac/SPE response at a specific potential and the antioxidant activity of nutraceuticals, as determined by conventional spectrophotometric methods (DPPH, galvinoxyl and ABTS), is discussed in the context of developing a fast biosensor for the relative antioxidant activity quantification.

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“…This process forms active sites on their surface or interior, enhancing their catalytic activity, particularly in oxidizing formaldehyde. Notable examples include polypyrrole [ 152 ], polyaniline [ 155 ], polydopamine [ 153 ], and polyacrylonitrile [ 154 ]. Advancements in synthesis and the exploration of new materials are expected to further improve these catalysts’ efficiency and broaden their applications.…”

Section: Electrochemical Sensors For Formaldehydementioning

confidence: 99%

Recent Advances in Electrochemical Sensors for Formaldehyde

Yang,

Hao,

Huang

et al. 2024

Molecules

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Formaldehyde, a ubiquitous indoor air pollutant, plays a significant role in various biological processes, posing both environmental and health challenges. This comprehensive review delves into the latest advancements in electrochemical methods for detecting formaldehyde, a compound of growing concern due to its widespread use and potential health hazards. This review underscores the inherent advantages of electrochemical techniques, such as high sensitivity, selectivity, and capability for real-time analysis, making them highly effective for formaldehyde monitoring. We explore the fundamental principles, mechanisms, and diverse methodologies employed in electrochemical formaldehyde detection, highlighting the role of innovative sensing materials and electrodes. Special attention is given to recent developments in nanotechnology and sensor design, which significantly enhance the sensitivity and selectivity of these detection systems. Moreover, this review identifies current challenges and discusses future research directions. Our aim is to encourage ongoing research and innovation in this field, ultimately leading to the development of advanced, practical solutions for formaldehyde detection in various environmental and biological contexts.

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Detection of formaldehyde by cyclic voltammetry using a PANI/GO composite film–modified electrode

Cited by 9 publications

References 37 publications

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Assessment of the Antioxidant Activity of Catechin in Nutraceuticals: Comparison between a Newly Developed Electrochemical Method and Spectrophotometric Methods

Recent Advances in Electrochemical Sensors for Formaldehyde

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