Titanium dioxide(TiO2)nanoparticles were prepared in the hydrothermal way and used for photocatalytic degradation of methylene blue.Product morphology,composition and crystal type were respectively analyzed by environmental scanning electron microscope(ESEM),transmission electronmicroscope(TEM),energy dispersed x-ray analysis(EDAX),and X-ray diffractomer techniques(XRD),and the effects of different photocatalytic conditions on the degradation rate of methylene blue in visible light were discussed.Results show that the product belongs to anatase-type TiO2.In the visible region(λ≥460nm),the optimal experimental conditions for photocatalysis are as follows:methylene blue concentration is 20μg/mL,light time is 60min,the amount of photocatalyst is 0.5 g and the maximum degradation rate is 57.35%.This provides basic data for further development of TiO2-based composite photocatalyst.
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