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.

我们通过以下简便方法成功地构建了TiO ₂桩状多层石墨烯纳米复合材料（T-MLGs）：十二烷二胺预起毛，离子交换（Ti ⁴⁺柱撑）和通过水热法原位形成TiO ₂。TiO ₂纳米颗粒均匀分布在石墨烯夹层上。这种特殊的结构结合了石墨烯和TiO ₂纳米颗粒的优点。结果，具有64.3wt％的TiO _2的T-MLG显示出最佳的光降解速率和对环丙沙星的吸附能力。TiO ₂为64.3wt％的T-MLGs的光降解速率在150分钟的发光二极管光照射下为78％。同时，TiO ₂为64.3wt％的T-MLGs的拟一级反应速率常数是原始TiO ₂的拟一级反应速率常数的3.89倍。经过五次连续的光催化测试，复合材料还显示出高稳定性和可重复使用性。这项工作提供了一种通过用其他纳米颗粒代替TiO ₂纳米颗粒来合成半导体柱状石墨烯纳米复合材料的简便方法，以及在废水控制中可持续利用光催化剂的可行方法。