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A series of CuO-K_2Mo_4O_(13)composite materials have been prepared by mixing appropriates quantities,in solid state,of CuO and pure K_2Mo_4O_(13) according to the molar ratios CuO/K_2Mo_4O_(13) = 0.05,0.1,0.2,0.5,and 1.The prepared samples were characterized using techniques such as X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FT-IR),differential thermal analysis(DTA),nitrogen adsorption measurements,and UV spectroscopy.According to XRD results,the phase composition of the CuO-K_2Mo_4O_(13) systems has significantly changed by increasing the molar ratio CuO/K_2Mo_4O_(13) where new phases,identified as K_2Mo_3O_(10) and CuMoO_4,have been detected.The formation of these new phases has been tracked through FT-IR and DTA measurements.The nitrogen adsorption-desorption measurements also reveal a change in the pore type of me studied materials due to the presence of these new phases.The photocatalytic activities of K_2Mo_4O_(13) and CuO-K_2Mo_4O_(13) composites were studied by means of monitoring the ability of these materials to the degradation,under UV irradiation,of methyl red in liquid media.It was found that the phase composition of the used samples significantly controls their photocatalytic activities.
A series of CuO-K_2Mo_4O_ (13) composite materials have been prepared by mixing appropriates quantities in solid state, of CuO and pure K_2Mo_4O_ (13) according to the molar ratios CuO / K_2Mo_4O_ (13) = 0.05,0.1,0.2,0.5 , and 1. The prepared samples were characterized using techniques such as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), differential thermal analysis (DTA), nitrogen adsorption measurements, and UV spectroscopy. According to XRD results , the phase composition of the CuO-K_2Mo_4O_ (13) systems has significantly changed by increasing the molar ratio CuO / K_2Mo_4O_ (13) where new phases, identified as K_2Mo_3O_ (10) and CuMoO_4, have been detected. The formation of these new phases has been tracked through FT-IR and DTA measurements. nitrogen adsorption-desorption measurements also reveal a change in the pore type of me studied materials due to the presence of these new phases. photocatalytic activities of K_2Mo_4O_ (13) and CuO-K_2Mo_4O_ (13) composites were studie d by means of monitoring the ability of these materials to the degradation, under UV irradiation, of methyl red in liquid media. It was found that the phase composition of the used samples significantly controls their photocatalytic activities.