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材料导报  2020, Vol. 34 Issue (10): 10108-10113    https://doi.org/10.11896/cldb.19070115
  金属与金属基复合材料 |
铀(Ⅵ)在卟啉基MOF上的吸附行为
孙艳兵, 吕日文, 韩雪雯, 钟玮鸿, 黄剑, 刘畅, 戴荧, 曹小红
东华理工大学核资源与环境国家重点实验室,南昌 330013
Adsorption Behavior of Uranium(Ⅵ) onto Porphyrin-based MOF
SUN Yanbing, LYU Riwen, HAN Xuewen, ZHONG Weihong, HUANG Jian, LIU Chang, DAI Ying, CAO Xiaohong
State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China
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摘要 本实验采用自下而上法制备了两种卟啉基MOF,即Zn-TCPP和Co-TCPP(TCPP为中-四(4-羧基苯基)卟吩)。通过扫描电镜(SEM)、Zeta电位测试、红外光谱(FT-IR)和X射线衍射(XRD)等表征手段对材料的微观形貌和结构进行表征。采用批量吸附实验,考察了pH值、接触时间、初始铀浓度和温度等因素对吸附U(Ⅵ)的影响。实验结果表明,在298.15 K、pH=5.5时,Zn-TCPP和Co-TCPP对U(Ⅵ)的最大理论吸附容量分别为412.2 mg/g和307.7 mg/g。吸附过程主要是受化学作用控制,为表面单分子层吸附。两种材料均具有良好的循环使用性,五次吸附-解吸循环后,对铀的吸附量仍能保持在80％以上。
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孙艳兵
吕日文
韩雪雯
钟玮鸿
黄剑
刘畅
戴荧
曹小红
关键词:  卟啉基MOF  吸附  铀    
Abstract: In this study, two porphyrin-based metal-organic frameworks (MOF) containing Zn-TCPP and Co-TCPP (TCPP represents mes-tetrakis(4-carboxyphenyl) porphin) were synthesized via a simple bottom-up process. The microstructure and morphology of the prepared porphyrin-based MOF were characterized by scanning electron microscopy (SEM), Zeta analysis, infrared spectroscopy (FT-IR) and X-ray diffractometry (XRD). The effects of different pH, contact time, initial uranium concentration and temperature on the adsorption of U(Ⅵ) were investigated. The results of batch experiments showed that the maximum adsorption capacities of Zn-TCPP and Co-TCPP for U(Ⅵ) were 412.2 mg/g and 307.7 mg/g (298.15 K, pH=5.5), respectively. The adsorption process closely fitted the Langmuir isotherm, and pseudo-second-order kinetics models indicated that chemical and monolayer adsorption dominated the adsorption process of U(Ⅵ) onto both porphyrin-based MOF. It was found that both porphyrin-based MOF showed good recyclability and the adsorption capacity was still maintained above 80% after five adsorption-desorption cycles.
Key words:  porphyrin-based MOF    adsorption    U(Ⅵ)
                    发布日期:  2020-04-26
ZTFLH:  TQ424  
基金资助: 国家自然科学基金(11605027);江西省教育厅项目(GJJ160550);江西省研究生创新项目(YC2018-S345;DHYC-201827)
通讯作者:  曹小红,东华理工大学教授,研究生导师。2006年9月至2011年12月,在厦门大学获得分析化学专业理学博士学位。以第一/通讯作者在国内外学术期刊上发表论文10余篇,主持完成国家自然科学基金项目和江西省基金项目6项。主要研究方向为电分析化学,放射性核素的吸附与检测。xhcao@ecit.cn   
作者简介:  孙艳兵,东华理工大学硕士研究生。2017年入学,研究工作主要围绕放射性核素的分离与富集、电化学分析检测,并开展相关基础理论和应用研究。主持江西省研究生创新项目一项。
引用本文:    
孙艳兵, 吕日文, 韩雪雯, 钟玮鸿, 黄剑, 刘畅, 戴荧, 曹小红. 铀(Ⅵ)在卟啉基MOF上的吸附行为[J]. 材料导报, 2020, 34(10): 10108-10113.
SUN Yanbing, LYU Riwen, HAN Xuewen, ZHONG Weihong, HUANG Jian, LIU Chang, DAI Ying, CAO Xiaohong. Adsorption Behavior of Uranium(Ⅵ) onto Porphyrin-based MOF. Materials Reports, 2020, 34(10): 10108-10113.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.19070115  或          http://www.mater-rep.com/CN/Y2020/V34/I10/10108
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