甲醇分散的三元 FeO@γ-APS/氧化石墨烯基纳米杂化物用于从水溶液中去除苯并三唑的新型方法。
Methanol-dispersed of ternary FeO@γ-APS/graphene oxide-based nanohybrid for novel removal of benzotriazole from aqueous solution.
机构信息
Department of Civil and Environmental Engineering, University of Ulsan, South Korea.
Department of Civil and Environmental Engineering, University of Ulsan, South Korea.
出版信息
J Environ Manage. 2018 Mar 1;209:452-461. doi: 10.1016/j.jenvman.2017.12.085. Epub 2018 Jan 5.
A novel nanohybrid: FeO coated with γ-APS polymer deposited on graphene oxide (F@γ-A/G), to remove an emergent heterocyclic contaminant benzotriazole (BTA) from solution. F@γ-A/G was synthesized in methanol-dispersion via aminosilanization under ultra-sonication. We newly found that F@γ-A/G crystallite lattice has a 2D triangular-network intersection with angle of 60° in three types of d, d and d planes with different interplanar spacings. Textural characteristics did not affect BTA adsorption, which was desired at high temperature (40 °C), neutral solution (pH = 6) and controlled by endothermic process. Considering the maximum BTA adsorption capacity of 312.5 mg/g, which was much higher than previously reported adsorbents, the plausible mechanism was attributed to hydrophobic, electrostatic and π-π interaction. Effects of pH and temperature are significant on BTA adsorption to F@γ-A/G. Methanol was the best solvent for multiple cycle regeneration with only 2% loss of BTA removal efficiency even after five cycles of F@γ-A/G.
一种新型纳米杂化材料
FeO 被γ-APS 聚合物涂层包裹并沉积在氧化石墨烯（F@γ-A/G）上，用于从溶液中去除新兴的杂环污染物苯并三唑（BTA）。F@γ-A/G 通过超声辅助下的氨硅烷化作用在甲醇分散体中合成。我们新发现 F@γ-A/G 晶体格子在三种不同的 d、d 和 d 平面上具有 60°的二维三角网络交点，具有不同的层间距。在高温（40°C）、中性溶液（pH=6）下，通过吸热过程进行控制，F@γ-A/G 对 BTA 的吸附不受其结构特征的影响。考虑到最大 BTA 吸附容量为 312.5 mg/g，远高于先前报道的吸附剂，合理的机制归因于疏水、静电和π-π相互作用。pH 值和温度对 F@γ-A/G 吸附 BTA 的影响显著。甲醇是最佳溶剂，即使经过五次 F@γ-A/G 循环，其 BTA 去除效率也仅损失 2%。
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