Cobalt oxide loaded graphitic carbon nitride as adsorptive photocatalyst for tetracycline removal from aqueous solution.

Author(s) Niu, J.; Xie, Y.; Luo, H.; Wang, Q.; Zhang, Y.; Wang, Y.
Journal Chemosphere
Date Published 2019 Mar
Abstract

The treatment of antibiotic-containing wastewater is of great importance due to the potential threats of antibiotics to human and the ecosystem. We reported the preparation of cobalt oxide loaded graphitic carbon nitride (CoO/g-CN) by an impregnation-calcination method for tetracycline (TC) removal from aqueous solution. The developed CoO/g-CN exhibited high adsorption capacity and fast adsorption kinetic for TC due to the complexation of TC with surface loaded CoO. In particular, 7%CoO/gCN3 sample presented a maximum TC adsorption capacity of 391.4 mg g. It was found that Langmuir and pseudo-second order kinetic models fitted TC adsorption process well. Further photocatalytic studies showed that CoO loaded g-CN was active for TC photodegradation, although the photocatalytic reaction rate constant was lower than that of native g-CN. CoO nanoparticles loading on g-CN played the major role of adsorption sites rather than cocatalyst for photocatalysis. We believe that the developed CoO/g-CN could be a potential adsorptive photocatalyst for antibiotic pollutants removal from wastewater.

DOI 10.1016/j.chemosphere.2018.11.111
Keywords Adsorption; Anti-Bacterial Agents; Catalysis; Cobalt; Graphite; Light; Nitriles; Oxides; Photolysis; Tetracycline; Waste Water; Water; Water Pollutants, Chemical
ISSN 1879-1298
Citation Niu J, Xie Y, Luo H, Wang Q, Zhang Y, Wang Y. Cobalt oxide loaded graphitic carbon nitride as adsorptive photocatalyst for tetracycline removal from aqueous solution. Chemosphere. 2019;218:169-178.

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