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Wyszukujesz frazę "Kamalakkannan, J." wg kryterium: Autor

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Natural sun-light assisted photocatalytic and electrocatalytic activity of WO3-TiO2 novel nanomaterial
    Autorzy:
    Kamalakkannan, J.
    Balraj, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1157041.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Photocatalysis
    Reusability
    Sun light
    Opis:
    The WO3-TiO2 novel nanomaterial was synthesized by precipitation method and sonication technique. The nanomaterial for the degradation of malachite green (MAG) dye under natural sun light irradiation. The synthesized nanomaterial is characterized by HR-SEM with EDX, PL and UV-Vis DRS analysis. The photodegradation of MAG at various parameters are reported. The mechanisms of dye degradation in natural sun light explain the higher photocatalytic activity of the catalyst. The result indicates the advantage of wastewater treatment by it. The electrochemical study from DSSC analysis showed increased current by WO3-TiO2 nanomaterial. It was proposed that the catalyst was found to be stable and reusable.
    Źródło:
    World Scientific News; 2018, 94, 2; 276-286
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Highly developed construction of Heterostructured InWO3-InMoO3 loaded-TiO2 nanomaterial and Expanding multi-application
    Autorzy:
    Kamalakkannan, J.
    Senthilvelan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1178704.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    HR-TEM
    Photocatalytic
    antibacterial activity
    electrochemical study
    Opis:
    InWO3-InMoO3 loaded-TiO2 nanomaterial was synthesised by co-precipitation method and sonication technique. The nanomaterial was characterized by High-resolution scanning electron microscopy (HR-SEM) with elementary dispersive X-ray (EDX), High-resolution transmission electron microscopy (HR-TEM), photoluminescence spectroscopy (PL) and UV-Vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of InWO3-InMoO3 loaded-TiO2 nanomaterial was studied from the photodegradation of methyl green (MEG) and methylene blue (MB) under UV-light irradiation at 365 nm. The hydroxyl radical formation in the mechanism was confirmed by fluorescence quenching technique. The mineralization confirmed by chemical oxygen demand measurements. A flaxisible mechanism is proposed for higher catalytic activity of InWO3-InMoO3-TiO2 under UV-light for 365 nm. This catalyst was found to be stable and reusable without appreciable loss of catalytic activity up to five cycles. The InWO3- InMoO3 loaded-TiO2 nanomaterial on MEG was high photocatalytic activity that of MB so high photocatalytic activity has been discussed by first order kinetics, rate constant value and high quantum yield. This material was showed increased hydrophobicity that of TiO2 electrochemical study and antibacterial activity of the analysis was also studied.
    Źródło:
    World Scientific News; 2017, 67, 2; 338-364
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphology convenient flower like nanostructures of CdO-SiO2 nanomaterial and its photocatalytic application
    Autorzy:
    Kamalakkannan, J.
    Senthilvelan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182834.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    FE-SEM; HR-TEM; Photocatalytic activity; •OH analysis
    Opis:
    Highly efficient CdO-SiO2 nanomaterial was synthesized by Sol-gel method and sonication technique. The nanomaterial was characterized by Field-emission Scanning electron microscopy (FE-SEM) with elementary dispersive X-ray (EDX), High-resolution transmission electron microscopy (HR-TEM), photoluminescence spectroscopy (PL) and Ultraviolet-Visible diffuse reflectance spectra (DRS). The photocatalytic activity of CdO-SiO2 nanomaterial was studied from the photodegradation of Rh B as it has maximum efficiency at pH = 7 under UV-light irradiation at 365 nm. The photodegradation of dye various Catalyst loading and dye concentration is parameters have been studied. The hydroxyl radical formation in the mechanism was confirmed by fluorescence quenching technique. The mineralization of dye is confirmed by chemical oxygen demand measurements. An achievable mechanism is proposed for higher activity of CdO-SiO2 under UV-light at 365 nm. This catalyst was found to be stable and reusable.
    Źródło:
    World Scientific News; 2017, 62; 46-63
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    UV–Light assisted photocatalytic activity of Activated charcoal-TiO2 nanomaterial
    Autorzy:
    Kamalakkannan, J.
    Balraj, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112779.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Activated charcoal-TiO2
    RB 5 dye
    photocatalyst
    Opis:
    An activated charcoal-TiO2 Catalyst was synthesized via the precipitation method and sonication technique, and three dyes: Reactive Black 5 (RB 5), Rhodamine B (Rh B) and Napthol Blue Black (NBB) were used to assess the quality of the product under UV-Light. The nanomaterial was also characterized by High-resolution scanning electron microscopy (HR-SEM), elementary dispersive X-ray (EDX), photoluminescence spectroscopy (PL) and UV-Vis DRS. The photodegradation of the three dyes when exposed to this nanomaterial indicate the superior photocatalytic activity of RB 5 as compared to the other dyes. A mechanism is proposed for the higher activity of AC-TiO2 than that of TiO2 nanocomposite material. Overall, this nanocomposite material was found to be highly stable and reusable. The nanomaterial is also economically of very low cost.
    Źródło:
    World News of Natural Sciences; 2018, 17; 102-110
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and characterization of TiO2 and TiO2P25 nanomaterial and photocatalytic application
    Autorzy:
    Kamalakkannan, J.
    Karthikeyan, B.
    Senthilvelan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1182809.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    HR-SEM
    HR-TEM
    Photocatalytic properties
    Reusable
    Opis:
    TiO2 nanomaterial was prepared by precipitation method and sonication technique. The nanomaterial was characterized by HR-SEM with EDX, TEM, XRD, FT-IR and PL analysis. The photocatalytic activity of TiO2 was much better than that of TiO2–P25 under UV-light irradiation at 365 nm. The photocatalytic activity was evaluated from the photodegradation of malachite green (MAG). The influence of operational parameters such as the effect of catalyst loading dye concentration and chemical oxygen demand measurements had also been investigated. The Photodegradation was found to follow the pseudo-first-order kinetics. Hydroxyl radical formation in the mechanism was confirmed by fluorescence quenching technique. It was proposed that the catalyst is found to be stable and reusable.
    Źródło:
    World Scientific News; 2017, 65; 81-93
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of InWO3 - TiO2 nanocomposite material and multi application
    Autorzy:
    Kamalakkannan, J.
    Chandraboss, V. L.
    Senthilvelan, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193047.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Photocatalytic activity
    Antimicrobial activity
    Electrochemical activity
    Opis:
    InWO3 -TiO2 nanocomposite material was synthesised by co-precipitation method and sonication technique. The synthesized nanomaterial was characterized by FE-SEM with EDX, HR-TEM, XRD, FT-RAMAN, AFM and BET surface area measurements. The photocatalytic activity of InWO3-TiO2 nanocomposite material was studied from the photodegradation of malachite green (MAG) under UV-light irradiation. The photodegradation of MAG at various parameters are reported. The Photodegradation was found to follow the pseudo-first-order kinetics. The Hydroxyl radical formation in the mechanism was confirmed by fluorescence quenching technique. The antimicrobial activity of the prepared nanomaterials has also been investigated. Cyclic voltammeter (CV)) measurements analysis of the prepared nonamaterial was discussed in detail. It was proposed that the catalyst was found to be stable and reusable.
    Źródło:
    World Scientific News; 2016, 58; 97-121
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectral correlation analysis of Hammett substituent constants and biological activities of some (E)-1-(4-phenoxyphenyl)-3-phenylprop-2-en-1-ones
    Autorzy:
    Kalyanasundaram, N.
    Sakthinathan, S. P.
    Suresh, R.
    Kamalakkannan, D.
    Joseph, S. J.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412539.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 4-phenoxyphenylketones
    UV-spectra
    IR spectra
    NMR spectra
    Hammett constants
    substituent effects
    regression analysis and antimicrobial activities
    Opis:
    A series of aryl chalcones have been synthesized from 4-phenoxyacetophonone with various substituted benzaldehydes. The purity of all chalcones has been checked using their physical constants and spectral data. These spectral data have been correlated with Hammett substituent constants and F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effect of substituents on the above spectral data has been studied. The single parameter correlation with few Hammett constants and F and R parameters gave satisfactory correlation coefficients whereas all multiple correlations gave satisfactory correlation coefficients with Resonance, Field and Swain-Lupton’s parameters. The antimicrobial activities of all chalcones have been studied using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 9; 23-47
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of substituent effects and antimicrobial activities of some 2ʹ,5ʹ-dimethyl phenyl chalcones
    Autorzy:
    Joseph, S. J.
    Kamalakkannan, D.
    Arulkumaran, R.
    Sakthinathan, S. P.
    Suresh, R.
    Sundararajan, R.
    Vijayakumar, S.
    Ranganathan, K.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412597.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 2
    5ʹ-dimethyl phenyl chalcones
    UV spectra
    IR spectra
    NMR spectra
    substituent effects
    antimicrobial activities
    Opis:
    Some 2ʹ,5ʹ-dimethyl phenyl chalcones have been synthesized by Crossed-Aldol condensation between 2,5-dimethyl acetophenone and various substituted benzaldehydes using catalytic amount of sodium hydroxide and ethanol. The yields of the chalcones are more than 93 %. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 5; 99-123
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Insect antifeedant potent halogen substituted phenyl chalcones
    Autorzy:
    Sundararajan, R.
    Arulkumaran, R.
    Vijayakumar, S.
    Kamalakkannan, D.
    Suresh, R.
    John, J. S.
    Ranganathan, K.
    Sakthinathan, S. P
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412081.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Substituted styryl 2′,3′,4′-trichlorophenyl ketones
    sulfated Titania
    IR and NMR spectra
    Insect antifeedant activities
    Opis:
    Some 2′,3′,4′-trichlorophenyl chalcones [(E)-1-(2,3,4-trichlorophenyl)-3-(substituted phenyl)-2-propen-1-ones] have been synthesised using sulfated Titania catalyzed solvent-free aldol condensation between 2,3,4-trichloroacetophenone and substituted benzaldehydes. The purities of synthesised chalcones were checked by their analytical, physical and spectroscopic data reported in literature. The insect antifeedant activities of these chalcones have been studied using 4th instar larvae Achoea Janata L by castor leaf disc bio-assay method. The chloro substituted chalcones shows significant insect antifeedant activity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 1; 67-73
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectral correlation analysis and antimicrobial activities of some 2,4-dimethoxy phenyl chalcones
    Autorzy:
    Joseph, S. J.
    Arulkumaran, R.
    Kamalakkannan, D.
    Sakthinathan, S. P.
    Sundararajan, R.
    Suresh, R.
    Vijayakumar, S.
    Ranganathan, K.
    Kalyanasundaram, N.
    Vanangamudi, G.
    Thirunarayanan, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/412661.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    substituted styryl 2
    4-dimethoxy phenyl ketones
    UV spectra
    IR spectra
    NMR spectra
    substituent effects
    antimicrobial activities
    Opis:
    A series of 2,4-dimethoxy phenyl chalcones have been synthesized by Crossed-Aldol condensation of 2,4-dimethoxy phenyl and various substituted benzaldehydes. The purities of these chalcones have been checked by their physical constants, UV, IR, NMR and MASS spectral data. The spectral data of these chalcones have been correlated with Hammett sigma constants, F and R parameters using single and multi-linear regression analysis. From the results of statistical analysis, the effects of substituents on the spectral group frequencies have been discussed. The anti-microbial activities of these chalcones have been evaluated using Bauer-Kirby method.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 4; 48-65
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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