Electrochemical sensing of oxalic acid using silver nanoparticles loaded nitrogen-doped graphene oxide

Zafar, Muhammad Adeel; Liu, Yang; Allende, Scarlett; Jacob, Mohan V.

doi:10.1016/j.cartre.2022.100188

Cited by 17 publications

(9 citation statements)

References 40 publications

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“…Furthermore, supercapacitive SPBs also utilize, for the detection of exosomal miRNAs, oxalic acid, glucose, uric acid, tyrosine, SARS-CoV-2, and also blood pH. − …”

Section: Assembling Biosensor Devicesmentioning

confidence: 99%

Advanced Self-Powered Biofuel Cells with Capacitor and Nanogenerator for Biomarker Sensing

Yadav,

Patil,

Dutta

2023

ACS Appl. Bio Mater.

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Self-powered biofuel cells (BFCs) have evolved for highly sensitive detection of biomarkers such as noncodon micro ribonucleic acids (miRNAs) in the presence of interfering substrates. Self-charging supercapacitive BFCs for in vivo and in vitro cellular microenvironments represent the most prevalent sensing mechanism for diagnosis. Therefore, self-powered biosensing (SPB) with a capacitor and contact separation with a triboelectric nanogenerator (TENG) offers electrochemical and colorimetric dual-mode detection via improved electrical signal intensity. In this review, we discuss three major components: stretchable self-powered BFC design, miRNA sensing, and impedance spectroscopy. A specific focus is given to 1) assembling of sensors for biomarkers, 2) electrical output signal intensification, and 3) role of supercapacitors and nanogenerators in SPBs. We outline the key features of stretchable SPBs and the sequence of miRNA sensing by SPBs. We have emphasized the need of a supercapacitor and nanogenerator for SPBs in the context of advanced assembly of the sensing unit. Finally, we outline the role of impedance spectroscopy in the detection and estimation of biomarkers. We highlight key challenges in SPBs for biomarker sensing, which needs improved sensing accuracy, integration strategies of electrochemical biosensing for in vitro and in vivo microenvironments, and the impact of miRNA sensing on cancer diagnostics. This article attempts a specific focus on the accuracy and limitations of sensing unit for miRNA biomarkers and associated tool for boosting electrical signal intensity for a potential big step further.

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“…Furthermore, supercapacitive SPBs also utilize, for the detection of exosomal miRNAs, oxalic acid, glucose, uric acid, tyrosine, SARS-CoV-2, and also blood pH. − …”

Section: Assembling Biosensor Devicesmentioning

confidence: 99%

Advanced Self-Powered Biofuel Cells with Capacitor and Nanogenerator for Biomarker Sensing

Yadav,

Patil,

Dutta

2023

ACS Appl. Bio Mater.

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“…A semicircle region at higher frequencies attributed to the chargetransfer resistance (R ct ) and a linear region at lower frequencies corresponding to the diffusion process was observed for both electrodes. [55,56] The Rct values could be estimated by fitting the plot with an equivalent Randles circuit (inset, Figure 7), which was 206 and 79 Ω on the bare GCE and graphene/GCE, respectively. The substantial decrease in the R ct of graphene/GCE by a www.advmatinterfaces.de factor of ≈2.6 times suggests the fast electron-transfer kinetics due to the excellent electro-conductibility of the graphene material.…”

Section: Application Of Graphene In An Electrochemical Sensormentioning

confidence: 99%

Plasma‐Based Synthesis of Freestanding Graphene from a Natural Resource for Sensing Application

Zafar

Liu

Hernández

et al. 2023

Adv Materials Inter

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The bottomup approach, that is, modified Hummers' method, is a well-established chemical synthesis technique to synthesize graphene. However, this technique, not only utilizes strong acids and oxidants [4,5] but also entails numerous steps of synthesis such as dilution, mixing, oxidation, reduction, washing, centrifuging, and intense stirring. [6] On the other hand, some of the bottom-up methods, in particular, chemical vapor deposition (CVD) and plasma-enhanced chemical vapor deposition (PE-CVD) are expensive and laborious methodologies comprising pre-synthesis and post-synthesis requirements, that is, high vacuum, pre-heating, and subsequent transfer of graphene to other substrates. [7][8][9] Recently, a new bottom-up approach, so-called atmospheric pressure microwave plasma (APMP) is gaining popularity as it synthesizes graphene without the hassles of pre-heating, high vacuuming, and the need for a substrate. Most importantly, the graphene obtained through this method happens to be freestanding and scalable. [10,11] The precursors used for producing graphene have a significant role in determining the sustainability of the synthesis process. Often graphene is produced from commercially available graphite, [12] graphene oxide (GO), [13] methane, or other unreplenishable hydrocarbons. [14] These resources Atmospheric pressure microwave plasma has the lead in synthesizing freestanding and scalable graphene within seconds without the need for high vacuum and temperature. However, the process is limited in utilizing chemical sources for synthesis, such as methane and ethanol. Herein, the usage of an extract of a sustainable precursor, that is, Melaleuca alternifolia, commonly known as tea tree, is for the first time reported to synthesize graphene nanosheets in atmospheric pressure microwave plasma. The synthesis is carried out in a single step at a remarkably low microwave power of 200 W. The morphology, structure, and electrochemical properties of graphene are studied using state-of-the-art characterization techniques such as Raman spectroscopy, X-ray diffraction, transmission electron microscopy (TEM) and electrochemical impedance spectroscopy. The TEM images reveal the presence of a combination of nanostructures such as nano-horns, nano-rods, or nano-onions consisting of multi-layer graphitic architectures. An excellent sensing capability of as-synthesized graphene is demonstrated through the detection of diuron herbicide. A commendable linear range of 20 µm to 1 mm and a limit of detection of 5 µm of diuron is recorded.

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“…Oxalic acid (OA) can generally be found naturally in various plants, animals, and microorganisms (Zafar et al 2022). In some findings, the addition of oxalic acid was able to affect the inhibition of several types of metals including aluminum-magnesium (Rashid and Khadom 2022) and copper (Bernard et al 2007).…”

Section: Bioactive Compounds Of Propolismentioning

confidence: 99%

Propolis extract as a green bacterial corrosion inhibitor on three types of metals

et al. 2022

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Abstract. Watiniasih NL, Budiarsa IN, Antara ING, Wiradana PA. 2022. Propolis extract as a green bacterial corrosion inhibitor on three types of metals. Biodiversitas 23: 4852-4860. Corrosion causes severe damage to various types of metals, which is a serious problem in the infrastructure sector. Several studies have been conducted to find more efficient natural inhibitors. This study was aimed to determine the effectiveness of antioxidants from propolis extract in inhibiting the growth of bacteria that cause corrosion on various metals. The ethanol extract was carried out to obtain the bioactive contained in the propolis extract, then analyzed its antioxidant activity with DPPH and characterized using GC-MS. Various concentration of propolis extract were tested on NA+1% Fe medium to determine its resistance to corrosion-causing bacteria. Propolis extract was tested on several types of metals in inhibiting the corrosion rate. The results showed that the tested propolis extract had strong antioxidant activity with an IC50 value of 82.496 ppm. The characterization of the metabolite profile showed that the propolis extract was dominated by chemical components that act as antioxidants and antibacterial agents. In the future, the results of this study can be used as a practical guide for the application of bioactive compounds through a biocontrol approach to the growth of corrosion-causing bacteria.

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Electrochemical sensing of oxalic acid using silver nanoparticles loaded nitrogen-doped graphene oxide

Cited by 17 publications

References 40 publications

Advanced Self-Powered Biofuel Cells with Capacitor and Nanogenerator for Biomarker Sensing

Advanced Self-Powered Biofuel Cells with Capacitor and Nanogenerator for Biomarker Sensing

Plasma‐Based Synthesis of Freestanding Graphene from a Natural Resource for Sensing Application

Propolis extract as a green bacterial corrosion inhibitor on three types of metals

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