Zhang Longfei, Yang Li, Xu Yewei, Chang Guanjun
State Key Laboratory of Environment-friendly Energy Materials, School of Material Science and Engineering, Southwest University of Science and Technology Mianyang 621010 P. R. China
RSC Adv. 2019 Sep 20;9(51):29772-29778. doi: 10.1039/c9ra04166d. eCollection 2019 Sep 18.
A novel porous organic material 4-hydroxyindole-formaldehyde/NaOH (4-HIF/NaOH) aerogel was prepared a facile polymerization, soaking in NaOH aqueous solution and ambient drying method. 4-HIF/NaOH aerogel porous polymer networks with high surface area have been applied as efficient adsorbents to remove methylene blue from wastewater synergistic effects of cation-π interaction induced electrostatic interaction, electrostatic interaction and π-π interaction. The adsorption capacity calculated by adsorption isotherms at 303 K was 1016.9 mg g which is higher than those observed for methylene blue on other aerogels and most other materials. Furthermore, the methylene blue loaded 4-HIF aerogel can easily be regenerated with 0.1 M HCl solution and ethanol wash, retaining over 75% of the adsorption capacity after recycling five times.
通过简便的聚合、浸泡在氢氧化钠水溶液中以及常压干燥法制备了一种新型多孔有机材料4-羟基吲哚-甲醛/氢氧化钠（4-HIF/NaOH）气凝胶。具有高比表面积的4-HIF/NaOH气凝胶多孔聚合物网络已被用作高效吸附剂，通过阳离子-π相互作用诱导的静电相互作用、静电相互作用和π-π相互作用的协同效应从废水中去除亚甲基蓝。在303 K下通过吸附等温线计算的吸附容量为1016.9 mg/g，高于在其他气凝胶和大多数其他材料上观察到的亚甲基蓝的吸附容量。此外，负载亚甲基蓝的4-HIF气凝胶可以很容易地用0.1 M盐酸溶液和乙醇洗涤再生，循环五次后保留超过75%的吸附容量。
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