Key Laboratory of Advanced Functional Materials, Key Laboratory of and Functional Molecule Design and Interface Process, Anhui Jianzhu University, Hefei 230601, PR China.
Key Laboratory of Advanced Functional Materials, Key Laboratory of and Functional Molecule Design and Interface Process, Anhui Jianzhu University, Hefei 230601, PR China.
J Colloid Interface Sci. 2018 Aug 15;524:129-138. doi: 10.1016/j.jcis.2018.04.012. Epub 2018 Apr 4.
A novel 4-aminothiophenol functionalized graphene oxide composite (GO-SH) was prepared by an easy reaction route. Chemical structure and element analysis showed that the sulfhydryl groups (-SH) were successfully decorated on GOs. The sorption capacity toward U(VI) from aqueous solution was conducted by batch experiments. The results indicated the maximum sorption capacity of GO-SH composite toward U(VI) at pH = 5.5 and T = 298 K could reach 281.69 mg·g on the base of the Langmuir model. The sorption kinetic curve for U(VI) fitted well with the pseudo-second-order model. X-ray photoelectron spectroscopy and infrared analysis demonstrated that the surface-grafted sulfhydryl groups contributed to the sorption of U(VI) by forming the surface complexation. The GO-SH also showed high stability and excellent reuse capability. Therefore, GO-SH can be regarded as a potential sorbent for the efficient removal of U(VI) from aqueous solutions.
一种新型的 4-氨基硫酚功能化氧化石墨烯复合材料（GO-SH）通过简单的反应路线制备。化学结构和元素分析表明，巯基（-SH）成功地修饰在 GO 上。通过批量实验研究了其对水溶液中 U(VI)的吸附能力。结果表明，在 pH=5.5 和 T=298 K 的条件下，GO-SH 复合材料对 U(VI)的最大吸附容量基于朗缪尔模型可达 281.69mg·g。U(VI)的吸附动力学曲线很好地符合拟二级模型。X 射线光电子能谱和红外分析表明，表面接枝的巯基通过形成表面配合物促进了 U(VI)的吸附。GO-SH 还表现出较高的稳定性和优异的可重复使用性。因此，GO-SH 可以被视为一种从水溶液中有效去除 U(VI)的潜在吸附剂。
