Facile fabrication of electrochemically reduced graphene oxide/polythionine-methylene blue and its use as a platform for detection of nicotinamide adenine dinucleotide in the artificial urine sample

Ding, Minling; Niu, Huizhe; Zhang, Nan; Hou, Tongtong; Guan, Ping; Hu, Xiaoling

doi:10.1016/j.electacta.2022.140715

Cited by 10 publications

(7 citation statements)

References 42 publications

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“…The constant increase in peak currents with subsequent potential scans indicates the deposition of conducting ERGO on the PGE. One can attribute the cathodic current peak (c 2 ) to the irreversible electrochemical reduction of GO, while the cathodic peak c 1 and the anodic peak a 1 are attributable to the redox pair of a number of electrochemically active O‐containing groups present on the graphene planes, which remained stable against reduction via the cyclic voltammetry technique [47–49] …”

Section: Resultsmentioning

confidence: 99%

Nanocomposite of Electrochemically Reduced Graphene Oxide and Poly (p‐aminobenzenesulfonic acid) Incorporated with Ni (II) Ions as an Electrocatalyst for the Oxidation of Methanol

Habibi,

Farhadi,

Minaie

2023

ChemistrySelect

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A new nanocomposite containing Ni(II) ions, electrochemically reduced graphene oxide (ERGO) and poly (p‐aminobenzenesulfonic acid) (Pp‐ABSA) on pencil graphite electrode (PGE) was prepared using electrochemical deposition coupled with self‐assembly accumulation method and characterized with different techniques. The electrochemical behavior and electrocatalytic activity of modified PGEs were investigated. The Ni/Pp‐ABSA/ERGO/PGE showed a unique electrocatalytic oxidation through an Electrochemical‐Chemical (EC’) pathway for methanol in alkaline media (Jpf=7.04 mA cm−2 and Eonest=0.38 V) compared to Ni/PGE, Ni/Pp‐ABSA/PGE and Ni/ERGO/PGE. The obtained results showed that the self‐assembled incorporation of Ni(II) ions in Pp‐ABSA/ERGO film prepared on PGE surface produced a stable modifier with high electrocatalytic activity towards methanol oxidation. In conclusion, the introduced method for the preparation of Pp‐ABSA/ERGO‐based nanocomposites can open a new, cheap and simple way to design a high‐performance electrocatalyst for direct methanol fuel cell systems.

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Section: Resultsmentioning

confidence: 99%

Nanocomposite of Electrochemically Reduced Graphene Oxide and Poly (p‐aminobenzenesulfonic acid) Incorporated with Ni (II) Ions as an Electrocatalyst for the Oxidation of Methanol

Habibi,

Farhadi,

Minaie

2023

ChemistrySelect

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“…0.33 and 0.36 V (vs Ag/AgCl), 20 it is still insufficient to minimize the interfering effects and surface fouling. Various redox mediators, such as toluidine blue O (TBO), 21 methylene blue (MTB), 22 and thionine (THI), 23 The optimized reagent layer configuration was further modified with the additional HBD/NAD + biocatalytic layer along with a chitosan outer layer toward the biosensing of the HB target using the coating layout shown in Figure 3A. The effect of the detection potential was investigated over the −0.10 to +0.20 V range.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…0.33 and 0.36 V (vs Ag/AgCl), it is still insufficient to minimize the interfering effects and surface fouling. Various redox mediators, such as toluidine blue O (TBO), methylene blue (MTB), and thionine (THI), are thus commonly being used for facilitating the electron transfer and low-potential amperometric detection of NADH. The effect of these mediator-CNTs-modified SPCE strips (Figure A(a)) toward chronoamperometric responses of NADH oxidation (Figure A(b)) at a low positive potential of 0.1 V vs Ag/AgCl was thus studied and compared.…”

Section: Resultsmentioning

confidence: 99%

Self-Testing of Ketone Bodies, along with Glucose, Using Touch-Based Sweat Analysis

et al. 2022

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β-Hydroxybutyrate (HB) is one of the main physiological ketone bodies that play key roles in human health and wellness. Besides their important role in diabetes ketoacidosis, ketone bodies are currently receiving tremendous attention for personal nutrition in connection to the growing popularity of oral ketone supplements. Accordingly, there are urgent needs for developing a rapid, simple, and low-cost device for frequent onsite measurements of β-hydroxybutyrate (HB), one of the main physiological ketone bodies. However, real-time profiling of dynamically changing HB concentrations is challenging and still limited to laboratory settings or to painful and invasive measurements (e.g., a commercial blood ketone meter). Herein, we address the critical need for pain-free frequent HB measurements in decentralized settings and report on a reliable noninvasive, simple, and rapid touch-based sweat HB testing and on its ability to track dynamic HB changes in secreted fingertip sweat, following the intake of commercial ketone supplements. The new touch-based HB detection method relies on an instantaneous collection of the fingertip sweat at rest on a porous poly(vinyl alcohol) (PVA) hydrogel that transports the sweat to a biocatalytic layer, composed of the β-hydroxybutyrate dehydrogenase (HBD) enzyme and its nicotinamide adenine dinucleotide (NAD+) cofactor, covering the modified screen-printed carbon working electrode. As a result, the sweat HB can be measured rapidly by the mediated oxidation reaction of the nicotinamide adenine dinucleotide (NADH) product. A personalized HB dose–response relationship is demonstrated within a group of healthy human subjects taking commercial ketone supplements, along with a correlation between the sweat and capillary blood HB levels. Furthermore, a dual disposable biosensing device, consisting of neighboring ketone and glucose enzyme electrodes on a single-strip substrate, has been developed toward the simultaneous touch-based detection of dynamically changing sweat HB and glucose levels, following the intake of ketone and glucose drinks.

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“…[28][29][30] These oxygen-containing groups affect their electrochemical performance. 31,32 GO reduction is considered an interesting route to obtain a superconductor, along with pure graphene. Various GO reduction methods, such as chemical, thermal and photothermal treatments, have been reported recently.…”

Section: Introductionmentioning

confidence: 99%

An electrochemical sensor for flubendiamide insecticide analysis based on chitosan/reduced graphene oxide

et al. 2023

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Facile fabrication of electrochemically reduced graphene oxide/polythionine-methylene blue and its use as a platform for detection of nicotinamide adenine dinucleotide in the artificial urine sample

Cited by 10 publications

References 42 publications

Nanocomposite of Electrochemically Reduced Graphene Oxide and Poly (p‐aminobenzenesulfonic acid) Incorporated with Ni (II) Ions as an Electrocatalyst for the Oxidation of Methanol

Nanocomposite of Electrochemically Reduced Graphene Oxide and Poly (p‐aminobenzenesulfonic acid) Incorporated with Ni (II) Ions as an Electrocatalyst for the Oxidation of Methanol

Self-Testing of Ketone Bodies, along with Glucose, Using Touch-Based Sweat Analysis

An electrochemical sensor for flubendiamide insecticide analysis based on chitosan/reduced graphene oxide

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