Lauric acid surface modified Co2+-ZnO@SSM composite membrane: Photocatalytic degradation of MB and oil/water separation for removal of organic pollutants
Lauric acid surface modified Co2+-ZnO@SSM composite membrane: Photocatalytic degradation of MB and oil/water separation for removal of organic pollutants
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DOI：
10.1016/j.apsusc.2023.156933
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发表时间：
2023-03
影响因子：
6.7
通讯作者：
Qiqi Wu;Wentao Zhang;Chen Qu;Fei Yuan;Yi Huang;Xianfei Chen;Ruoxi Zhang
中科院分区：
文献类型：
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作者：
Qiqi Wu;Wentao Zhang;Chen Qu;Fei Yuan;Yi Huang;Xianfei Chen;Ruoxi Zhang
采用水热法制备了月桂酸改性的不锈钢丝网负载Co2+掺杂ZnO（LA/Co2+-ZnO@SSM），以实现油水分离和光催化活性的双重功能。通过改变LA的浸泡时间，可以有效地调节LA/Co2+-ZnO@SSM复合膜的表面极性。LA/Co2+-ZnO@SSM在LA浸泡120 min后达到超疏水性，WAC值达到156.6 ± 3.0°。在不同的油水混合物体系中，LA/Co2+-ZnO@SSM复合膜表现出优异的油水分离能力和分离通量，10次循环后的分离效率仍保持在90%以上。同时，LA/Co2+-ZnO@SSM复合材料也保持了良好的光催化活性，对亚甲基蓝的光催化降解效率达到90%。即使在复杂的有机物和油的溶液中，光催化降解效率仍在75%以上。此外，LA/Co2+-ZnO@SSM复合膜还表现出较低的附着力、良好的柔韧性和抗压能力。研究结果表明，具有可见光驱动吸附和油水分离功能的LA/Co2+-ZnO@SSM复合膜可作为一种新型的净化策略应用于实际复杂废水的处理。
The stainless steel wire mesh supported Co2+-doped ZnO with lauric acid modification (LA/Co2+-ZnO@SSM) was prepared through hydrothermal method for dual-functional oil/water separation performance and high photocatalytic activity. By changing the immersing time of LA, the surface polarity of the LA/Co2+-ZnO@SSM composite membrane could be efficiently adjusted from hydrophilic to hydrophobic. The superhydrophobicity of LA/Co2+-ZnO@SSM was achieved after LA immersing 120 min, and the WAC value reached as 156.6 ± 3.0°. In different oil/water mixture systems, the LA/Co2+-ZnO@SSM composite membrane exhibited excellent oil/water separation ability and separation throughput, and the separation efficiency still remained above 90 % after 10-cycle separation. Meanwhile, the LA/Co2+-ZnO@SSM composite also maintained an excellent photocatalytic activity, and the photocatalytic efficiency for methylene blue degradation reached 90 %. Even in the solution of complex organics and oil, the photocatalytic degradation efficiency was still above 75 %. In addition, LA/Co2+-ZnO@SSM composite membrane also showed a low adhesion, good flexibility and anti-pressure ability. All results indicated that the dual-functional LA/Co2+-ZnO@SSM composite membrane with visible light-driven photocatalysis and oil/water separation performance could be used for practical complex wastewater as a novel purification strategy.