Synthesis of Mo-Modified TiO2 Material with Enhanced Photocatalytic activity

Ha Tran Huu, Ngoc Ngo Van, Vien Vo, Lan Nguyen Thi

Abstract


The Mo-modified TiO2 was synthesized via facile impregnation combined with pyrolysis of mixtures in several different initial mass ratios of precursors as mTi(OH)4/m(NH4)6Mo7O24.4H2O equaling 5, 10 and 15 in 500 oC for an hour. The as-prepared samples, denoted as n-MT-500 within n for the initial mass ratio of precursors, were characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, Raman spectroscopy, as well as X-ray photoelectron spectroscopy, which all not only illustrate the presence of TiO2 and MoO3 components in the composites but also demonstrate the introduction of Mo hetero-atom into anatase lattice. All of the obtained samples performed higher photocatalytic activity under visible light than TiO2 via the photodecomposition of RhB in aqueous solution, in which 10-MT-500 exhibits the highest degradation efficiency up to 87% after 5-hour illumination.


Keywords


TiO2; MoO3; photocatalyst; Ilmenite; modified-TiO2

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References


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DOI: https://doi.org/10.51316/jca.2021.090

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