کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4990304 | 1456947 | 2017 | 9 صفحه PDF | دانلود رایگان |
- CDs/g-C3N4/ZnO composites were synthesized by a facile impregnation-thermal method.
- CDs/g-C3N4/ZnO samples were characterized by various characterization technologies.
- CDs/g-C3N4/ZnO samples showed high visible-light-induced photocatalytic performance.
Tetracycline (TC) in the water environment always brings negative impacts on human health and ecosystem equilibrium. Here we report that the carbon dots (CDs)/g-C3N4/ZnO nanocomposite prepared by a facile impregnation-thermal method exhibits outstanding photocatalytic activities for the total photodegradation of TC. Notably, the 30 wt% g-C3N4/ZnO with introducing 4 mL CDs solution (500 mg/L) photocatalyst displays the best photocatalytic activity in the degradation of TC (100 mL, 10 mg/L; 100% degradation within 30 min) under very weak visible irradiation (λ > 420 nm, 18 mW/cm2). In present system, CDs deposited on the surfaces of g-C3N4/ZnO heterojunction not only increases the visible-light response, but also promotes the efficiency of electron-hole pairs separation due to its electrons transfer property. Experiments further confirm that the superoxide radical (O2â) and hydroxyl radical (OH) formed on the surface of the photocatalyst are in charge of the degradation of TC.
Journal: Separation and Purification Technology - Volume 173, 1 February 2017, Pages 295-303