• KAMATCHI THIYAGARAJAN

      Articles written in Bulletin of Materials Science

    • C$_3$N$_4$ supported on chitosan for simple and easy recovery of visible light active efficient photocatalysts

      KAMATCHI THIYAGARAJAN STANLY SAMUEL P SENTHIL KUMAR SUNDARAM GANESH BABU

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      To investigate the photocatalytic activities of heterogeneous systems under visible light, graphitic carbon nitride (g-C$_3$N$_4$) and chitosan (CS) were chosen as a model system. By solution cast method, C$_3$N$_4$ were embedded into a CS biopolymer matrix in this study. The purpose is to degrade methyl orange (MO) using a novel C$_3$N$_4$/CS nanocomposite thin film. Using a visible light-equipped photoreactor with a tungsten incandescent lamp, photo-decolourization of dye was carried out. To catalyse the photodegradation of organic dye pollutant MO, a C$_3$N$_4$/CS nanocomposite film photocatalyst was found to be successful and a recovery of 100% of the photocatalyst is achieved by a simple new hand-picking technique.Usingscanning electron microscopy, transmission electron microscopy, X-ray diffraction, Fourier transform-infrared spectroscopy and UV–visible diffuse reflectance spectroscopy, detailed characterization was carried out. C$_3$N$_4$/CS has high capacity and better photocatalytic activity compared to g-C$_3$N$_4$ and CS, because C$_3$N$_4$ possesses a larger surface area and CS has highabsorption efficiency which is indicated by the photocatalytic discolouration of MO under visible light irradiation. The C$_3$N$_4$/CS nanocomposite thin film photocatalyst is regarded as an excellent catalyst with 98% degradation efficiency and is prepared by the simple solution cast method. The total organic carbon value was measured to be 86%. These values evidencethat the mineralization of MO was carried out under these conditions.

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