简便制备具有晶格空位且对铀具有高效吸附性能的低成本HKUST-1。

Facile preparation of low-cost HKUST-1 with lattice vacancies and high-efficiency adsorption for uranium.

作者信息

Yang Aili, Li Ping, Zhong Jingrong

机构信息

Institute of Materials, China Academy of Engineering Physics Huafeng Xincun No. 9 Mail-box 9071-7 Jiangyou 621900 China

出版信息

RSC Adv. 2019 Apr 2;9(18):10320-10325. doi: 10.1039/c9ra01427f. eCollection 2019 Mar 28.

In this work, we prepared HKUST-1 and HKUST-1 with lattice vacancies (HLV) using benzoic acid (BA) as a low-cost modulator to replace part of the traditional trimesic acid ligand (HBTC). The structure and morphology of the products were characterized by FTIR, XRD, SEM and XPS. The adsorption performance of the products for uranium from aqueous solutions was investigated. The results showed that the sorption of U(vi) on HKUST-1 and HLV agreed with the Langmuir isotherm model ( = 0.9867 and = 0.9828) and the maximum adsorption capacity was 430.98 mg g and 424.88 mg g, respectively. According to kinetics studies, the adsorption fitted better with a pseudo-second-order model ( = 1.0000 and = 0.9978). The as-prepared adsorbents were used for the removal of uranium from real water samples as well. The results showed that HLV with lower cost is a promising adsorbent for uranium from aqueous solutions.

在本工作中，我们使用苯甲酸（BA）作为低成本调节剂来替代部分传统的均苯三甲酸配体（HBTC），制备了HKUST-1和具有晶格空位的HKUST-1（HLV）。通过傅里叶变换红外光谱（FTIR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对产物的结构和形貌进行了表征。研究了产物对水溶液中铀的吸附性能。结果表明，U(Ⅵ)在HKUST-1和HLV上的吸附符合朗缪尔等温线模型（分别为 = 0.9867和 = 0.9828），最大吸附容量分别为430.98 mg g和424.88 mg g。根据动力学研究，吸附更符合准二级模型（分别为 = 1.0000和 = 0.9978）。所制备的吸附剂也用于从实际水样中去除铀。结果表明，成本较低的HLV是一种从水溶液中吸附铀的有前景的吸附剂。