Nano CuO: Electrochemical sensor for the determination of paracetamol and d-glucose

Avinash, B.; Ravikumar, C.R.; Kumar, Manjeet; Nagaswarupa, H.P.; Santosh, M.S.; Bhatt, Aarti S.; Кузнецов, Денис

doi:10.1016/j.jpcs.2019.06.012

Cited by 129 publications

(26 citation statements)

References 35 publications

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“…The SAED pattern suggests a polycrystalline nature of the NPs as identified by some bright spots and rings. The cross section "d" spacing calculated was around 0.228 nm for the plane (111), which is in close proximity to 0.232 nm for (111) plane of CuO as reported earlier [20].…”

Section: Tem Analysissupporting

confidence: 88%

Synthesis and Characterization of Green CuO using Centella Asiatica Plant Leaf Extract: Electrochemical and Photocatalytic Activities

Rudresha¹,

Hussain²,

Ravikumar³

et al. 2020

Adv. Mater. Lett.

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Section: Tem Analysissupporting

confidence: 88%

Synthesis and Characterization of Green CuO using Centella Asiatica Plant Leaf Extract: Electrochemical and Photocatalytic Activities

Rudresha¹,

Hussain²,

Ravikumar³

et al. 2020

Adv. Mater. Lett.

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“…The resistance of the nonmaterial can be obtained using the Nyquist plot. The semicircular portion at a higher frequency is equal to the electron transfer resistance (R ct ) at the contact interface of the electrode and electrolyte solution [37]. As seen in figure 9, the semicircular diameter of g-Ag NPs is small.…”

Section: Electrochemical Activitymentioning

confidence: 98%

Electrochemical properties of biogenic silver nanoparticles synthesized using Hagenia abyssinica (Brace) JF. Gmel. medicinal plant leaf extract

Murthy¹,

Desalegn²,

Ravikumar³

et al. 2020

Mater. Res. Express

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The biogenic/green silver nanoparticles (g-Ag NPs) were synthesised by using the extract of indigenous medicinal plant of Ethiopia, Hagenia abyssinica (Brace) JF. Gmel. leaf extract for the first time, to investigate the synergistic effect of biomolecules towards the enhancement of electrochemical properties of NPs. The synthesized g-Ag NPs were characterized by UV-visible, UV-DRS, FT-IR, XRD, SEM, EDXA, TEM, HRTEM and SAED techniques. The maximum absorbance, λ max was found to be 461 nm for g-Ag NPs due to surface plasmon resonance. The energy gap, E g of NPs, was found to be 2.31 eV. FTIR spectrum confirmed the presence of bioactive compounds responsible for possible capping and stabilisation of g-Ag NPs. The XRD analysis revealed that the g-Ag NPs are highly crystalline exhibiting sharp peaks for (111), (200), (220) and (311) planes in the diffraction pattern. SEM and TEM micrographs showed differently shaped Ag particles in addition to spherical shape. The average particle size of NPs was found to be 24.08 nm using imageJ analysis. EDX analysis confirmed the presence of Ag in the g-Ag NPs. In addition, the SAED pattern of g-Ag NPs presented concentric patterns for 4 major planes of crystalline silver. The d-spacing values of 0.2428 nm, 0.2126 nm, 0.1483 nm and 0.1263 nm corresponds to d 111 Ag, d 200 Ag, d 220 Ag and d 311 Ag lattice fringes respectively. The cyclic voltammetry (CV) results suggest that g-Ag NPs possess better electrochemical properties due to its lower charge transfer resistance value of 17 Ω. EIS studies too revealed better stability of g-Ag NPs as electrode materials.

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“…The low frequency region straight line is represented by the Warburg element (W) in series with R ct . Warburg element is an estimation of the redox reactions occurring in the system, i.e., the diffusion of electrons from the working electrode and deposition of nickel ions from the electrolyte into the pores on the electrode surface [57], the electrolytic diffusion of ions takes place during the transition from the high-frequency semicircle to the mid-frequency point [58]. The constant phase element (Q 1 ) lies parallel to the charge-transfer resistance (R ct ), as does the low frequency capacitance (Q 2 ) to the leakage resistance (R l ).…”

Section: Impedance Studiesmentioning

confidence: 99%

Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique

Bhatt

Ranjitha²,

Santosh³

et al. 2020

Materials

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Nanostructured NiO and Li-ion doped NiO have been synthesized via a facile microwave technique and simulated using the first principle method. The effects of microwaves on the morphology of the nanostructures have been studied by Field Emission Spectroscopy. X-ray diffraction studies confirm the nanosize of the particles and favoured orientations along the (111), (200) and (220) planes revealing the cubic structure. The optical band gap decreases from 3.3 eV (pure NiO) to 3.17 eV (NiO doped with 1% Li). Further, computational simulations have been performed to understand the optical behaviour of the synthesized nanoparticles. The optical properties of the doped materials exhibit violet, blue and green emissions, as evaluated using photoluminescence (PL) spectroscopy. In the presence of Li-ions, NiO nanoparticles exhibit enhanced electrical capacities and better cyclability. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results show that with 1% Li as dopant, there is a marked improvement in the reversibility and the conductance value of NiO. The results are encouraging as the synthesized nanoparticles stand a better chance of being used as an active material for electrochromic, electro-optic and supercapacitor applications.

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Nano CuO: Electrochemical sensor for the determination of paracetamol and d-glucose

Cited by 129 publications

References 35 publications

Synthesis and Characterization of Green CuO using Centella Asiatica Plant Leaf Extract: Electrochemical and Photocatalytic Activities

Synthesis and Characterization of Green CuO using Centella Asiatica Plant Leaf Extract: Electrochemical and Photocatalytic Activities

Electrochemical properties of biogenic silver nanoparticles synthesized using Hagenia abyssinica (Brace) JF. Gmel. medicinal plant leaf extract

Optical and Electrochemical Applications of Li-Doped NiO Nanostructures Synthesized via Facile Microwave Technique

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