Functionalized and Enhanced HB Pencil Graphite as Bioanode for Glucose-O<sub>2</sub>Biofuel Cell

Bandapati, Madhavi; Rewatkar, Prakash; Krishnamurthy, Balaji; Goel, Sanket

doi:10.1109/jsen.2018.2878582

Cited by 15 publications

(8 citation statements)

References 74 publications

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“…As can be seen in Figure b, with an increase in the glucose concentration, there was a linear growth in the corresponding oxidation current up to 30 mM; after that, a gradual drop in the oxidation current was noticed . This change in behavior satisfies the saturation kinetics principle of an electrochemical reaction, with no further increase in glucose concentration . The optimized 30 mM glucose concentration was further utilized for subsequent μPAD-EBFC characterizations and analysis.…”

Section: Resultsmentioning

confidence: 73%

“…28 This change in behavior satisfies the saturation kinetics principle of an electrochemical reaction, with no further increase in glucose concentration. 29 The optimized 30 mM glucose concentration was further utilized for subsequent μPAD-EBFC characterizations and analysis. Likewise, the CV analysis of laccase-modified BP was studied to evaluate the reaction kinetics by utilizing Triton X-100.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

Rewatkar

Goel

2020

ACS Sustainable Chem. Eng.

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Recently, as an efficient renewable power source, paper microfluidic enzymatic biofuel cells have received significant attention. Due to their inherent characteristics and outstanding performance, a microfluidic paper-based analytical device for enzymatic biofuel cells (μPAD-EBFCs) has emerged as the best alternative to conventional power supplies for various miniaturized devices. This work presents a novel, user-friendly, and costefficient enzyme and mediator-immobilized electrochemistry-based shelf-stackconfigured μPAD-EBFC. This Y-shaped colaminar fluid-flow EBFC has been realized using multiwall carbon nanotube (MWCNT)-composed Bucky paper (BP) as a bioelectrode, where GOx (anodic enzyme) and laccase (cathodic enzyme) were immobilized with optimized chemistry. The potentiometric oxidation and reduction performances of fabricated bioelectrodes were characterized using different electrochemical techniques. Subsequently, four such Y-shaped μPAD-EBFCs were realized in a shelf-stack configuration using a mini-three-dimensional (3D) printed platform, where the μPAD-EBFCs were connected in various series−parallel arrangements. With such shelf-stack configurations, 4 series-connected μPAD-EBFCs delivered the maximum stable open circuit potential of 1.65 V, with a peak power density of 46.4 μW/cm 2 (58 μA/cm 2 ) at 0.8 V. The generated output power is sufficient to power the small portable device, which can be easily and suitably tuned depending on the application.

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Section: Resultsmentioning

confidence: 73%

Section: ■ Results and Discussionmentioning

confidence: 99%

Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

Rewatkar

Goel

2020

ACS Sustainable Chem. Eng.

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“…It was found that, bioelectrode with plain, 2, 4, 6, 8 comb-like structures exhibited Rct of 12 KΩ ,8.7 KΩ, 7.3 KΩ, 5.7 KΩ, 2.6 KΩ respectively. The plain electrode con guration gave the lowest resistance of 2.6 KΩ which is an indication of better enzyme activity and conjugation (Bandapati et al 2019) than all other bioelectrode con guration due to the high surface area and immobilized enzymes. The amount of enzyme immobilized governs various the e cient electron transfer kinetics (Yang et al 2012) Different bioelectrodes were integrated into the micro uidic device and tested at the lowest ow rate of 3 ml/hour.…”

Section: Number Of Comb Partitionsmentioning

confidence: 91%

Additively Manufactured Microfluidic Enzymatic Biofuel Cell with Comb -like Bioelectrodes

Sivakumar

Goel

2021

Preprint

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3D printing is a growing processing technology, which offers manufacturing of tailored, portable and integrable electrochemical energy harvesting device for realising next generation bioelectronics devices. Enzymatic biofuel cells (EBFCs) associated with biocatalysis uses biofriendly alternatives for energy harvesting. Also at microscale, the precision design and assembling of the bioelectrodes are complex procedures. The combination of computer-assisted design and 3D printing has enabled the realization of customized electrochemical miniaturized devices for various applications. In this work, a completely 3D printed EBFC at a micro level configuration, names as 3D-µEBFC, integrated with new precise bioelectrode configuration has been demonstrated. The 3D-µEBFC consists of bioelectrode with comb-like structures with carbon black which helps in increasing the active surface to volume ratio available for electrocatalysis by 80 times higher than plain electrodes. This micro-device produced an output power density of 13 µW/cm2 with an open circuit voltage of 570 mV. The 3D printed bioelectrodes show high stability, which may transform the fabrication methodology by decreasing production costs and time, letting the development of complex-shaped and purely 3D printed micro-devices.

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“…To avoid these requirements, many researchers have focused on the use of disposable electrodes in the electrochemical sensors/biosensors [25][26][27]. Recently, pencil graphite leads have been widely used as one of disposable electrode materials in electroanalysis, because they have some superior properties such as commercial availability, cheapness, electrochemical reactivity, good mechanical rigidity [26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44]. Besides, pencil graphite electrode (PGE) does not require time-consuming cleaning and polishing procedures required for some other solid electrodes.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Electrochemical Determination of Trifluralin at a Disposable Pencil Graphite Electrode

2021

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A sensitive differential pulse (DP) voltammetric method has been proposed for the determination of trifluralin (TFA) based on both its reduction and oxidation at a disposable pencil graphite electrode (PGE). DP voltammograms recorded under optimized conditions show that oxidation and reduction peak currents increased linearly in the range from 1.0 to 75.0 μM and from 0.50 to 100.0 μM TFA, respectively. LOD and sensitivity values have been determined as 0.39 μM and 11170 μA mM−1 cm−2 for oxidation and as 0.20 μM and 22167 μA mM−1 cm−2 for reduction. The acceptable recovery values (95.2–104.8 %) were obtained from real water samples.

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Functionalized and Enhanced HB Pencil Graphite as Bioanode for Glucose-O₂Biofuel Cell

Cited by 15 publications

References 74 publications

Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

Additively Manufactured Microfluidic Enzymatic Biofuel Cell with Comb -like Bioelectrodes

Sensitive Electrochemical Determination of Trifluralin at a Disposable Pencil Graphite Electrode

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Functionalized and Enhanced HB Pencil Graphite as Bioanode for Glucose-O2Biofuel Cell

Cited by 15 publications

References 74 publications

Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

Optimized Shelf-Stacked Paper Origami-Based Glucose Biofuel Cell with Immobilized Enzymes and a Mediator

Additively Manufactured Microfluidic Enzymatic Biofuel Cell with Comb -like Bioelectrodes

Sensitive Electrochemical Determination of Trifluralin at a Disposable Pencil Graphite Electrode

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Functionalized and Enhanced HB Pencil Graphite as Bioanode for Glucose-O₂Biofuel Cell