Construction of TiO2-pillared multilayer graphene nanocomposites as efficient photocatalysts for ciprofloxacin degradation

被引:17
作者
Zeng, Xiong-feng [1 ]
Wang, Jian-sheng [1 ]
Zhao, Ying-na [1 ]
Zhang, Wen-li [1 ]
Wang, Meng-huan [1 ]
机构
[1] North China Univ Sci & Technol, Hebei Prov Lab Inorgan Nonmetall Mat, Coll Mat Sci & Engn, Tangshan 063210, Peoples R China
关键词
pillared structure; titanium dioxide-pillared multilayer graphene nanocomposites; photocatalysis; ciprofloxacin; IN-SITU; TIO2; COMPOSITE; OXIDE; NANOPARTICLES; HETEROJUNCTION; FABRICATION; INTERFACE; MECHANISM;
D O I
10.1007/s12613-020-2193-y
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We successfully constructed TiO2-pillared multilayer graphene nanocomposites (T-MLGs) via a facile method as follows: dodecanediamine pre-pillaring, ion exchange (Ti4+ pillaring), and interlayer in-situ formation of TiO2 by hydrothermal method. TiO2 nanoparticles were distributed uniformly on the graphene interlayer. The special structure combined the advantages of graphene and TiO2 nanoparticles. As a result, T-MLGs with 64.3wt% TiO2 showed the optimum photodegradation rate and adsorption capabilities toward ciprofloxacin. The photo-degradation rate of T-MLGs with 64.3wt% TiO2 was 78% under light-emitting diode light irradiation for 150 min. Meanwhile, the pseudofirst-order rate constant of T-MLGs with 64.3wt% TiO2 was 3.89 times than that of pristine TiO2. The composites also exhibited high stability and reusability after five consecutive photocatalytic tests. This work provides a facile method to synthesize semiconductor-pillared graphene nanocomposites by replacing TiO2 nanoparticles with other nanoparticles and a feasible means for sustainable utilization of photocatalysts in wastewater control.
引用
收藏
页码:503 / 510
页数:8
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