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Fabrication of Bi_2O_3/TiO_2nanocomposites and their applications to the degradation of pollutants in air and water under visible-light 被引量:7
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作者 Ashok Kumar Chakraborty md Emran Hossain +1 位作者 md masudur rhaman K M A Sobahan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第2期458-465,共8页
A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light (λ≥ 420 nm) was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was emplo... A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light (λ≥ 420 nm) was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was employed as an organic binder to unite Bi2O3 and TiO2 nanoparticles. The SEM, TEM, XRD and diffuse reflectance spectra were utilized to characterize the prepared Bi2O3/TiO2 nanoheterojunction. The nanocomposite exhibited unusual high photocatalytic activity in decomposing 2-propanol in gas phase and phenol in aqueous phase and, evolution of CO2 under visible light irradiation while the end members exhibited low photocatalytic activity. The composite was optimized to 5 mol% Bi2O3/TiO2. The remarkable high photocatalytic efficiency originates from the unique relative energy band position of Bi2O3 and TiO2 as well as the absorption of visible light by Bi2O3. 展开更多
关键词 nanoheterojunction Bi2O3/TiO2 composite photocatalyst pollutants visible-light
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