Synthesis of reduced graphene oxide/Co3O4 nanocomposite electrode material for sensor application

Vinodhkumar, G.; Ramya, R.; Potheher, I. Vetha; Vimalan, M.; Péter, Á.

doi:10.1007/s11164-019-03777-5

Cited by 14 publications

(4 citation statements)

References 52 publications

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“…It was found that G-rGO obtained a 2.43 eV optical energy band gap ( E g ). A similar trend was reported for the reduction of the GO using lemon juice as a reducing agent and microwave-irradiated partially reduced GO. , …”

Section: Resultssupporting

confidence: 83%

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Green Synthesis of Reduced Graphene Oxide Using the Tinospora cordifolia Plant Extract: Exploring Its Potential for Methylene Blue Dye Degradation and Antibacterial Activity

Saini,

Mishra,

Kumar

2024

ACS Omega

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Graphene has attracted significant attention recently due to its unique mechanical, electrical, thermal, and optical properties. The present study focuses on synthesizing green rGO using the Tinospora cordifolia plant extract by mixing it in a suspension of graphene oxide. The plant extract of T. cordifolia acts as a reducing agent and is cost-effective, renewable, and ecofriendly. Green-synthesized rGO (G-rGO) was characterized using FTIR, HR-SEM, EDX, and HR-XRD analyses. G-rGO consists of nanosheets with an average width of approximately 30 nm. G-rGO has a range of hydrodynamic radius (270−470) nm and an average ζ potential of −29.9 mV. Further, G-rGO was used as a nanoadsorbent for optimal exclusion of methylene blue (MB) dye using the response surface methodology (RSM). Adsorption results confirmed 94.85% MB dye removal with 58.81 mg g −1 adsorption capacity at optimum conditions. The G-rGO's antibacterial activity was also tested against Staphylococcus aureus (Grampositive) and Escherichia coli (Gram-negative) bacteria, finding the exhibited zone of inhibition of 10, 11, and 15 mm and 10, 13, and 17 mm at 20, 40, and 80 μg mL −1 concentrations of G-rGO, respectively.

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Section: Resultssupporting

confidence: 83%

“…A similar trend was reported for the reduction of the GO using lemon juice as a reducing agent and microwave-irradiated partially reduced GO. 51 , 52 …”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Reduced Graphene Oxide Using the Tinospora cordifolia Plant Extract: Exploring Its Potential for Methylene Blue Dye Degradation and Antibacterial Activity

Saini,

Mishra,

Kumar

2024

ACS Omega

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“…In particular, easy and powerful analytical approaches desired for food preservation and quality control can be easily achieved with accurate and sensitive sensors. In the preparation of such sensors, especially conductive carbon structures [20][21][22] and nanoparticles [23][24][25] are of great importance. Today, the importance and success of electrochemical sensors reinforced with carbon-based nanomaterials are increasing, as well as the number and variety of commercial electrodes used in the clinic and the field [26][27][28][29].…”

Section: Fatma Bilge Emrementioning

confidence: 99%

Preparation of voltammetric sensors for taurine detection from Cu(II)-loaded carbon materials

Emre

2023

Bull. Chem. Soc. Eth.

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ABSTRACT. In this study, for the detection of taurine in philological fluids, modified electrodes were prepared from glassy carbon electrodes with MWCNT (multi-wall carbon nanotube) + Cu(NO3)2 + carbon-based material. A carbon-based material was obtained by carbonization of Pinus sylvestris branch needles (CPS). Cu(NO3)2 and MWCNT structure (Cu(NO3)2/MWCNT) were added to the carbon-based material and the obtained mixture was used in the modification of the glassy carbon electrode surface. The surface morphology and structure of the prepared electrodes were characterized by electron microscopy scanning (SEM) and atomic force microscopy (AFM). Taurine detection with a modified electrode was made by cyclic voltammetry (CV) in 0.1 M KCl (vs. Ag/AgCl). The calibration curve of the modified electrode for taurine in the 10-150 µM range showed a linear response, and R2 value was 0.976. Limit of detection (LOD) and limit of quantification (LOQ) of the modified electrode were found 19 µM and 9.75 µM, respectively. The application of the electrode as a chemical sensor was carried out with commercially available energy drink samples. Satisfactory results have been obtained from the samples. The sensor can be used for routine taurine analysis. This electrode can quickly determine the amount of taurine in real samples with 90% accuracy in two minutes. KEY WORDS: Taurine detection, Modified electrode, MWCNT, Sensor, Cyclic voltammetry Bull. Chem. Soc. Ethiop. 2023, 37(6), 1565-1576. DOI: https://dx.doi.org/10.4314/bcse.v37i6.20

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“…The above unique structure is acknowledged to strongly influence surface communication and hence the observed electrochemical signal [23,24]. Application of graphene-based materials for construction of active sensors is dominated by combining them with other supportive compounds such as organo-metallic complexes and polymers, metal and metal oxide nanoparticles and other hybrid constituents [25][26][27][28][29][30]. Application of pristine graphene independently as an active sensing materials is not widely applied because of certain disadvantages attributed to surface passivation and slow electrode kinetics [31,32].…”

Section: Introductionmentioning

confidence: 99%

An efficient sensor based on anodic activation of graphene oxide for sensitive and selective determination of dopamine in blood serum

Khudaish,

Al Ghafri,

Al Hatmi

et al. 2023

SQU Journal for Science

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A native graphene oxide (NGO) prepared by Hummers modified method was used as the template materials for the fabrication of electrochemically oxidative graphene oxide (OGO) onto a glassy carbon electrode (GCE). The fabrication of OGO-GCE persuaded via anodic reversible potentiodynamic of NGO base surface materials that increases the concentration of oxygen functionalities. The development of a new aldehyde/alcoholic functional group on OGO-GCE characterized by XPS analysis is a marked signal for oxygen richness surface which provoked on the cost of sp2 hybridized function. The EIS data underline that OGO-GCE promote the electron transfer kinetics much more than NGO-GCE by 9 times as estimated by the rate constant calculation. The XPS and EIS data highlight the influence of anodic treatment on increasing the interlayer spacing distance between the resultant OGO. Differential pulse voltammetry (DPV) results were evident for a promising efficiency of OGO-GCE on the simultaneous determination of dopamine (DA), ascorbic acid (AA) and uric acid (UA). In addition, the selectivity of the proposed sensor for DA quantification in the presence of high concentrations of AA and UA was achieved successfully with a detection limit (DL3s) approach to 12 nM. The analytical performance of OGO-GCE on serum blood revealed its potential application for trace DA quantification.

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Synthesis of reduced graphene oxide/Co3O4 nanocomposite electrode material for sensor application

Cited by 14 publications

References 52 publications

Green Synthesis of Reduced Graphene Oxide Using the Tinospora cordifolia Plant Extract: Exploring Its Potential for Methylene Blue Dye Degradation and Antibacterial Activity

Green Synthesis of Reduced Graphene Oxide Using the Tinospora cordifolia Plant Extract: Exploring Its Potential for Methylene Blue Dye Degradation and Antibacterial Activity

Preparation of voltammetric sensors for taurine detection from Cu(II)-loaded carbon materials

An efficient sensor based on anodic activation of graphene oxide for sensitive and selective determination of dopamine in blood serum

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