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    Synergic removal of tetracycline using hydrophilic three-dimensional nitrogen-doped porous carbon embedded with copper oxide nanoparticles by coupling adsorption and photocatalytic oxidation processes

    Year: 2021

    Journal: J. Colloid Interface Sci., Volume 581, JAN 1, page 350–361

    Authors: Su, Yiping; Li, Shun; Jiang, Guimin; Zheng, Zuquan; Wang, Chao; Zhao, Shiyin; Cui, Daling; Liu, Yong; Zhang, Boping; Zhang, Zuotai

    Organizations: Shenzhen Science and Technology Innovation Committee [JCYJ20180504165648211]; Shenzhen Peacock Plan [KQJSCX20180322151507786, KQTD2016022619584022]; Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control [K18293901]; Guangdong Basic and Applied Basic Research Foundation [2019A1515111042]

    Keywords: Porous composite; Hydrophilic; Tetracycline; Adsorption; Photocatalysis

    Adsorption and photocatalytic oxidation are promising technologies for eliminating antibiotics (e.g. tetracycline) in aquatic environments. However, traditional powdery nanomaterials are limited by drawbacks of difficult separation and lack of synergistic function, which do not conform to the practical demand. Herein, we developed a simple one-step gelation-pyrolysis route to fabricate hydrophilic three-dimensional (3D) porous photocatalytic adsorbent, in which CuO nanoparticles are uniformly and firmly embedded in nitrogen-doped (N-doped) porous carbon frameworks. The obtained N-doped carbon/CuO bulky composites exhibited excellent ability to adsorb tetracycline hydrochloride (TC), which was subsequently photo-oxidized under visible light. Their hydrophilic nature favors the adsorption processes toward TC, with a maximum adsorption capacity reaching 25.03 mg.g(-1). In addition, >94.4% of TC molecules could be photo-degraded in 4 h with good cycling efficiency after three consecutive tests. Finally, a reaction scheme for removal process of TC was proposed. The obtained 3D porous N-doped carbon/CuO nanocomposites show great promise for efficient removal of antibiotics in aqueous solution by synergistically utilizing adsorption and photocatalytic oxidation processes. (C) 2020 Elsevier Inc. All rights reserved.
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