Hydrothermal Synthesis of TiO2 Nanoparticles and Degradation of Methylene Blue under Visible Light Conditions
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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