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Titanium Dioxide (TiO2) Decorated Silver Indium Diselenide (AgInSe2): Novel Nano-Photocatalyst for Oxidative Dye Degradation

Abstract

Novel Visible-NIR photocatalyst prepared via hybridization of wide and small band gap semiconductors involving silver indium selenide (AgInSe2) and titanium dioxide by thermal and microwave methods is presented. The process revealed formation of new hybrid nanostructured materials with remarkably different properties than parent semiconductors. New catalysts were characterized by various advanced analytical tools such as, UV-Visible diffuse reflectance, Raman spectroscopy, XRD, SEM, EDS, TEM, XPS, BET etc. The change in optical properties in comparison to parent compounds viz. AgInSe2 and TiO2 resulted in broad absorption band covering entire UV-Visible region which confirmed successful coupling. XRD pattern revealed presence of diffraction peaks from both parent semiconductors. TEM showed spherical morphology with presence of small TiO2 NPs on the surface of AgInSe2 NPs. In-situ formed silver selenide can also generate useful AgInSe2 in the hybridized form which showed rather excellent photocatalytic performance. So-prepared hybrid nanostructured materials were tested for photocatalytic activity against three organic dyes viz. Methylene Blue (MB), Methyl Orange (MO) and Rhodamine B (RhB). Photocatalytic degradation efficiency was 89% for AgInSe2/Ag2Se against MB and found to be better than the parent semiconductors. AgInSe2/TiO2 showed almost no loss in the degradation efficiency even after reuse for five times confirming the stability and effectiveness.

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Publication details

The article was received on 14 Jun 2018, accepted on 05 Jul 2018 and first published on 06 Jul 2018


Article type: Research Article
DOI: 10.1039/C8QI00560E
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Titanium Dioxide (TiO2) Decorated Silver Indium Diselenide (AgInSe2): Novel Nano-Photocatalyst for Oxidative Dye Degradation

    A. S. Kshirsagar and P. K. Khanna, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00560E

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