ملخص
Visible-light-induced antibacterial activity of carbon-doped anatase-brookite titania nano-heterojunction photocatalysts are reported for the first time. These heterostructures were prepared using a novel low temperature (100 C) nonhydrothermal low power microwave (300 W) assisted method. Formation of interband C 2p states was found to be responsible for the band gap narrowing of the carbon doped heterojunctions. The most active photocatalyst obtained after 60 min of microwave irradiation exhibits a 2-fold higher visible-light induced photocatalytic activity in contrast to the standard commercial photocatalyst Evonik-Degussa P-25. Staphylococcus aureus inactivation rate constant for carbon-doped nano-heterojunctions and the standard photocatalyst was 0.0023 and -0.0081 min-1, respectively. It is proposed that the photoexcited electrons (from the C 2p level) are effectively transferred from the conduction band of brookite to that of anatase causing efficient electron-hole separation, which is found to be responsible for the superior visible-light induced photocatalytic and antibacterial activities of carbon-doped anatase-brookite nano-heterojunctions.
اللغة الأصلية | English |
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الصفحات (من إلى) | 1663-1672 |
عدد الصفحات | 10 |
دورية | ACS Applied Materials and Interfaces |
مستوى الصوت | 5 |
رقم الإصدار | 5 |
المعرِّفات الرقمية للأشياء | |
حالة النشر | Published - مارس 13 2013 |
منشور خارجيًا | نعم |
ASJC Scopus subject areas
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