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Great improvement on tetracycline removal using ZnO rod-activated carbon fiber composite prepared with a facile microwave method
Ist Teil von
Journal of hazardous materials, 2017-02, Vol.324 (Pt B), p.329-339
Ort / Verlag
Netherlands: Elsevier B.V
Erscheinungsjahr
2017
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
[Display omitted]
•ZnO rod-ACF was prepared by a method involving a microwave within only 3min.•ZnO rods (average diameter of 0.3–0.5μm, length of 1.0–1.5μm) were grown on ACF.•99% of tetracycline was degraded and 90.7% TOC was removed within 1h under UV light.•ZnO rod-ACF achieved high performances even after three cycles of uses.
New composite materials of activated carbon fiber (ACF) coated with zinc oxide (ZnO) were obtained by applying a green, cost-effective and rapid synthetic route using a commercial microwave oven. ZnO rods with a uniform and stable structure and an average diameter of 0.3–0.5μm and length of 1.0–1.5μm were achieved after only 3-min microwave treatment. The properties of ZnO were efficiently transferred to ACF, such that the resulting material, termed ZnO rod-ACF, demonstrated a promising potential as an efficient photocatalyst and simultaneously as an adsorbent. Pharmaceutical tetracycline at a concentration of 40mg/L was used to evaluate the organic pollutant removal capacity of the synthesized materials. At pH 8, ZnO rod-ACF exhibited excellent removal capacity (over 99%) and mineralization (90.7%) of tetracycline in aqueous solution within 1h under UV irradiation. The stability of ZnO rod-ACF was maintained and the mineralization of tetracycline was also maintained at 81.35% after multiple usage cycles. The photodegradation pathways of tetracycline were proposed based on the identified reaction intermediates.