Synthesis of MgFe2O4 nanoparticles and MgFe2O4 nanoparticles/CPE for electrochemical investigation of dopamine

Reddy, Sathish; Swamy, B.E. Kumara; Chandra, Umesh; Mahathesha, K. R.; Sathisha, Tammanekar V.; Jayadevappa, H.

doi:10.1039/c1ay05483j

Cited by 34 publications

(17 citation statements)

References 33 publications

(23 reference statements)

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“…(r 2 = 0.9721) (shown with closed circles (-•-)). It demonstrates that the redox of DA undergoes a two electron and two proton processes, which was consistence with that reported in the literature 33 .…”

Section: Effect Of Ph Value On the Determination Of Da At The Oamcpesupporting

confidence: 91%

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Resolution of Dopamine in the Presence of Ascorbic Acid and Uric Acid by the Poly Oxalic Acid Modified Carbon Paste Electrode

Rao¹,

Lavanya²

2015

Chem Sci Trans

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A novel poly oxalic acid carbon paste electrode was fabricated by electro polymerization process and characterized in this study. This poly oxalic acid modified carbon paste electrode by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) exhibited an excellent electro catalytic activity towards the resolution of ascorbic acid (AA), dopamine (DA) and uric acid (UA) compared with bare carbon paste electrode. The effect of pH range from 5.5 to 8.0 was studied and the redox peak was pH dependent with a slope of 60 mV/pH and from the regression coefficient of the effect of scan rate shows that the process is adsorption controlled. The DPV study of 6.2 to 131 μM concentration range of DA shows 6 µM detection limit. The oxidation potentials of AA, DA and UA at the poly oxalic acid modified carbon paste electrode was shifted slightly negatively and the peak currents were much larger than the bare carbon paste electrode. DPV was used for the simultaneous determination of AA, DA and UA in their mixture, and the peak potential separations between AA and DA, DA and UA, AA and UA were197 mV, 169 mV and 367 mV respectively. The limit of detection for AA, DA and UA were 0.93 mM, 7.4 µM and13 µM respectively. This Oxalic acid modified carbon paste electrode showed many merits in stability, sensitivity, facility, economy and also applicable for real sample analysis.

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Section: Effect Of Ph Value On the Determination Of Da At The Oamcpesupporting

confidence: 91%

“…In the above cyclic voltammograms, a pair of cathodic and anodic peaks of DA were appeared symmetrically and the potential separation of the two peaks was close to 60/n mV (n=2) at a low scan rate. It could be inferred that there was a quasi-reversible reaction on the Oxalic acid modified carbon paste 33 . Figure 5.…”

Section: Effect Of Scan Ratementioning

confidence: 99%

Resolution of Dopamine in the Presence of Ascorbic Acid and Uric Acid by the Poly Oxalic Acid Modified Carbon Paste Electrode

Rao¹,

Lavanya²

2015

Chem Sci Trans

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“…The electrochemical methods are sensitive, simple, eco‐friendly and are suitable for the analysis of colored and turbid samples . In the previous literature, nanoparticles based on CdO and CuO and organic compounds modified electrodes have been used for detection of uric acid using carbon‐based electrodes . The conducting polymers and metal oxides have also been used as active electrode materials …”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Activity and Biosensing of Gadolinium Substituted BiFeO₃ Nanoparticles

et al. 2018

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Gadolinium (Gd3+) substituted bismuth ferrite (BF) photocatalysts were synthesized using sol‐gel method and the effect of Gd3+ substitution was investigated on the structural, optical and surface properties of Gd3+ substituted BF nanoparticles. Different techniques such as X‐ray diffraction (XRD), high‐resolution transmission electron microscopy (HRTEM) with Selected area electron diffraction pattern (SAED), Fourier transform infrared spectra (FTIR), ultraviolet‐visible diffuse reflection spectra (UV‐DRS), field emission scanning electron microscopy (FESEM), Brunauer‐Emmett‐Teller (BET), and photoluminescence spectra (PL) were employed to characterize the nanoparticles. Compared to nascent BF, the Gd3+ substituted BF nanoparticles showed improved long‐range ordering, smaller pore diameter, higher porosity and redshift of the band gap. These properties were responsible for their improved photocatalytic activity, when tested for the photodegradation of organic dyes. It was found that 3 % Gd3+ substituted BF nanoparticles exhibited enhanced the photocatalytic activity of indigo carmine dye with a degradation ranging from 34 % to 69 %, while for Congo red dye the degradation varied from 37 % to 73 % under the visible light. Furthermore, bio‐sensing properties of BF materials were improved as detected by the uric acid using cyclic voltammogram technique.

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“…Based on these properties, CdO has been used for applications such as in catalysts , sensors , and in some optoelectronic devices . CdO nanoparticles were prepared via different techniques; for example, solid‐state reaction , mechanochemical method , and co‐precipitation method . Also, a green biosynthesis of CdO nanoparticles of 35 nm in size using Achillea Wilhelmsii plant was reported .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, optical, and dielectric properties of polyvinyl chloride/cadmium oxide nanocomposite films

et al. 2014

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Nano‐sized cadmium oxide (CdO) was synthesized using a sol–gel method and mixed with poly(vinyl chloride) (PVC). X‐ray diffraction and high‐resolution transmission electron microscopy measurements indicated that the average particle size of the CdO is about 70.18 nm. Scanning electron microscopy images revealed a good dispersion of CdO nanoparticles on the surface of the PVC films. The optical energy band gap (Eg) showed a decrease from 5.08 to 4.88 eV with increasing the CdO content. The refractive index dispersion of the nanocomposite films was found to obey the single oscillator model. The dispersion parameters were changed by CdO incorporation. According to the frequency and temperature dependence of the dielectric constant (ε′), the observed αa‐relaxation peaks were assigned to the micro‐Brownian motion of the polymer main chains. The influence of CdO nanoparticles content on the ac conductivity and the activation energy of PVC nanocomposite films were discussed. It was found that both dielectric and optical properties were reinforced by the adding of CdO nanoparticles to the PVC matrix. Finally, the results of the present system are compared with those of similar materials. POLYM. COMPOS., 35:1842–1851, 2014. © 2014 Society of Plastics Engineers

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Synthesis of MgFe2O4 nanoparticles and MgFe2O4 nanoparticles/CPE for electrochemical investigation of dopamine

Cited by 34 publications

References 33 publications

Resolution of Dopamine in the Presence of Ascorbic Acid and Uric Acid by the Poly Oxalic Acid Modified Carbon Paste Electrode

Resolution of Dopamine in the Presence of Ascorbic Acid and Uric Acid by the Poly Oxalic Acid Modified Carbon Paste Electrode

Enhanced Photocatalytic Activity and Biosensing of Gadolinium Substituted BiFeO₃ Nanoparticles

Synthesis, characterization, optical, and dielectric properties of polyvinyl chloride/cadmium oxide nanocomposite films

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Synthesis of MgFe2O4 nanoparticles and MgFe2O4 nanoparticles/CPE for electrochemical investigation of dopamine

Cited by 34 publications

References 33 publications

Resolution of Dopamine in the Presence of Ascorbic Acid and Uric Acid by the Poly Oxalic Acid Modified Carbon Paste Electrode

Resolution of Dopamine in the Presence of Ascorbic Acid and Uric Acid by the Poly Oxalic Acid Modified Carbon Paste Electrode

Enhanced Photocatalytic Activity and Biosensing of Gadolinium Substituted BiFeO3 Nanoparticles

Synthesis, characterization, optical, and dielectric properties of polyvinyl chloride/cadmium oxide nanocomposite films

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Enhanced Photocatalytic Activity and Biosensing of Gadolinium Substituted BiFeO₃ Nanoparticles