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

• 作者: Xiong-feng Zeng Jian-sheng Wang Ying-na Zhao Wen-li Zhang Meng-huan Wang
• 来源期刊: 矿物冶金与材料学报
• 年，卷（期）: 2021,（3）
• 页码范围: 503-510
• 页数: 8页
• 语种: 英文

摘要

We successfully constructed TiO2-pillared multilayer graphene nanocomposites (T-MLGs) via a facile method as follows: dodeca-nediamine 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 pseudo-first-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.