کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1254293 | 971368 | 2016 | 4 صفحه PDF | دانلود رایگان |
In this work, Bi2Ti2O7/TiO2 composites were synthesized and studied as potential visible-light-activated photocatalysts in the reduction of aqueous Cr(VI). Bi2Ti2O7/TiO2 composites with tunable compositions were synthesized via a solvothermal-calcination two-step method, simply by changing the molar ratios of Bi(NO3)3·5H2O to tetrabutyl titanate in the reactants. The compositions, structures and optical properties of the as-synthesized Bi2Ti2O7/TiO2 composites were characterized by X-ray diffraction, field emission scanning electron microscopy and UV–vis diffuse reflectance spectra. The photocatalytic activity of the as-synthesized Bi2Ti2O7/TiO2 composites was tested in the reduction of aqueous Cr(VI) under visible-light (λ > 420 nm) irradiation, and compared with that of TiO2 nanoparticles. It was observed that the as-synthesized Bi2Ti2O7/TiO2 composites exhibited much higher photocatalytic activity than TiO2 nanoparticles, and the most efficient composite (300 mg) can achieve the complete reduction of Cr(VI) in 300 mL of 50 mg/L K2Cr2O7 aqueous solution under visible-light (λ > 420 nm) irradiation in 90 min.
Bi2Ti2O7/TiO2 composites as potential visible-light-activated photocatalysts in the reduction of aqueous Cr(VI) were synthesized via a solvothermal-calcination two-step method. The as-synthesized Bi2Ti2O7/TiO2 composites exhibited much higher photocatalytic activity than TiO2 nanoparticles, and the most efficient composite (300 mg) can achieve the complete reduction of Cr(VI) in 300 mL of 50 mg/L K2Cr2O7 aqueous solution under visible-light (λ > 420 nm) irradiation in 90 min.Figure optionsDownload as PowerPoint slide
Journal: Chinese Chemical Letters - Volume 27, Issue 6, June 2016, Pages 867–870