The unique properties of carbon nanotubes make it very attractive for amperometric sensors. The rapid development of new nanomaterials and nanotechnology has opened up many opportunities for electrical analysis. Modification of the electrode surface by transferring mechanical modifiers is a new field that requires extensive research. This study demonstrates the expansion of electrochemical sensors based on MWCNT/RTIL/CrHCF nano composites (MWCNT/RTIL/CrHCF) modified with graphite electrodes for the detection of dopamine (DP) at 0.1 KNO3. (pH 7). The modified graphite composite electrode (GCE) is equipped with an appropriate amount of chromium deposited on the surface of MWCNT/RTIL/GCE and then hexacyanoferrate (CrHCF) is electrodeposited. Ultraviolet visible radiation, HR TEM, XRD, FTIR, EIS and CV (cyclic voltammetry) were used to examine the morphology and interface characteristics of the composite material. The modified electrode has excellent partial discharge detection performance with a linear range of 0.1 μM to 4.0 μM and a detection limit of 0.0121 nm (signal-to-noise ratio = 3). Under the best conditions, the sensor shows excellent stability and the results are satisfactory while analysing real samples.
Iron oxide (FeO) nanoparticles have gained considerable interest from researchers over the past few decades and have a massive effect on wave absorption materials, magnetic fluid, adsorbent, and a variety of industrial applications. In this study, ferric nitrate, sodium hydroxide, and ammonium hydroxide coalesced to form FeO nanoparticles using the chemical co-precipitation approach. X-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transforms infrared spectroscopy (FTIR), UV-VIS analysis, Photoluminesence (PL) spectrum analysis, and electrochemical measurements were used to characterize FeO nanoparticles. As per XRD, the sample’s crystallite size was 22.63[Formula: see text]nm and 22.64[Formula: see text]nm after it was annealed at 300∘C and 400∘C, respectively. Utilizing XRD, the diffraction patterns were seen. The particles appear to have a fine surface and smooth shape, as seen by SEM photographs. For the detection of FeO nanoparticles, optical and electrochemical examinations were carried out.
In this study, the co-precipitation approach was used to make nanostructured nickel oxide (NiO) commencing with sodium hydroxide (NaOH) and nickel (II) chloride hexahydrate (NiCl2[Formula: see text]6H2O). Through the use of X-ray diffraction (XRD), scanning electron microscopes (SEM), UV-visible (UV–Vis) absorption, and Fourier transform infrared (FTIR) imaging, structural and optical studies were investigated. FTIR, photoluminescence (PL), cyclic voltammetry (CV) studies are taken. The synthesized nanoparticles were annealed at 300[Formula: see text]C and 400[Formula: see text]C. The face-centered cubic (FCC) structure of the NiO and highly crystallized nanoparticles were revealed by XRD investigations. Observation of FTIR spectra validated the composition of functional groups. Scanning electron microscopy image shows the average size is 24 nm. NiO optical band gap at 300[Formula: see text]C (3.37 eV) and 400[Formula: see text]C (2.7 eV) is revealed from UV studies. From CV graph, the sample annealing at 300[Formula: see text]C and 400[Formula: see text]C the specific capacitance was 543.6 and 519.8 F/g, respectively. This study signifies the supercapacitor application of nanosized metal oxide.
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