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1 Materials Science Poland

1 2023

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Preparation and characterization of BiOCl/TiO2/MMTcomposite materials

Tuo Biyang, Shi Xiulong, Tian Jinwang, Wang Jianli

Materials Science Poland

2023

Vol. 41, No. 2

354--367

To broaden the light response range of TiO2 and improve its photocatalytic activity, BiOCl/ TiO2 /MMT composite materials(BTMC) with outstanding photocatalytic performance were prepared by the sol-gel method with montmorillonite (MMT) asthe supporting material, tetrabutyl titanate as titanium source and, bismuth nitrate pentahydrate as the bismuth source. Theproperties of the prepared materials were characterized by X-ray diffractometer (XRD), surface and porosity analysis (BET),scanning electron microscopy–energy-dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM),X-ray photoelectron spectrometry (XPS), and ultraviolet-visible diffuse reflection spectroscopy (UV-Vis DRS). When the Bi/Timolar ratio was 20%, the composite material exhibited a slit mesoporous structure, and its specific surface area was 109.02m2/g, with optimum photocatalytic activity. TiO2 and BiOCl formed the type-II heterojunction on the surface of MMT, whichfacilitates the transfer of photogenerated electrons and holes, thus enhancing the photocatalytic activity of BTMC-20. Theresults of this study indicated that BTMC-20 is a promising photocatalytic composite material and has better photocatalyticproperties under visible light.