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- 저자 : Velluchamy Muthuraj (검색결과 2 건)
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Polyaniline intercalated with Ag1.2V3O8 nanorods based electrochemical sensor
Karunamoorthy Saravanakumar,Vellaichamy Balakumar,Kadarkarai Govindan,Am Jang,Giehyeon Lee,Velluchamy Muthuraj 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.91 No.-
A sensitive electrochemical based sensor was demonstrated for the determination of uric acid (UA) bypolyaniline (PANI) intercalated with Ag1.2V3O8-PANI (AgV-PANI). In this study, a simple ultrasonicationmethod has been employed to prepare AgV-PANI nanorods and the crystalline structure, surfacetopography, and elemental status of the as-synthesized nanocomposites were investigated using variousanalytical techniques. These analyses revealed the formation of a good crystalline and50 nm diameterwith length of100–300 nm AgV-PANI nanorod-like structure. Distinguishable PANI particles wereapparently placed on the Ag1.2V3O8 surface, and the surface of the nanorods was exceptionally smooth. The incorporation of PANI with Ag1.2V3O8 significantly improved the charge-transfer characteristics andenhanced the peak current in the cyclic voltammogram compared with the case of pristine Ag1.2V3O8nanorods. The lowest threshold of UA detection was observed to be 0.017 mM (S/N = 3), and the detectionrange was wide (0.1–10 mM). Moreover, the AgV-PANI-modified electrode demonstrated excellentselectivity and sensitivity towards UA detection in the existence of other biologically importantinterferents. The present study confirmed that the proposed Ag1.2V3O8-PANI based electrochemicalsensor has good reproducibility and a long shelf life (40 d).
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S. Lakshmi Prabavathi,Kadarkarai Govindan,K. Saravanakumar,장암,Velluchamy Muthuraj 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
The CoWO4 nanoparticles assembled with g-C3N4 nanosheets were successfully fabricated by means of asimple hydrothermal method, followed by ultrasonication. The surface topography, crystalline structure,chemical status, and optical properties of as-prepared materials are well characterized herein. Thesestudies unveil the formation of CoWO4 nanoparticles assembled on the surface of g-C3N4 nanosheetswith good crystallinity. EDX and XPS studies substantiated that there were no impurities in thesynthesized photocatalyst materials. Furthermore, surface topographical (TEM) analysis affirms thatCoWO4 nanoparticles were successfully anchored to g-C3N4 nanosheet. This worthy interfacial contactbetween CoWO4 and g-C3N4 leads the transfer and separation of photo-induced charge carriers. Theeffect of catalyst loading and initial substrate concentrations on photocatalytic degradation of norfloxacinby as-prepared samples were examined under visible light. We found that the rate of CoWO4 and g-C3N4photocatalytic degradation of norfloxacin was 3.18 times and 2.69 times higher than that of pure g-C3N4and CoWO4, respectively. Enhanced photocatalytic activity was because the synergism between CoWO4nanoparticles and g-C3N4 nanosheets inhibit the fast recombination of photogenerated e –h+ pairs. Inaddition, the radical scavenger study substantiates that OH plays dominate role for norfloxacindegradation rather than O2. A possible mechanism responsible for photodegradation of the Z-schemewas ultimately proposed. This work can be useful in the rational design and delivery of new types ofZ-scheme photocatalysts.
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