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 Chemosphere. 2019;218:169178.

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