Weiwei Du , Cailing Ni , Chao Liu , Hewei Yan , Jun Zhu , Yumei Luo , Ye Tao , Ao Meng , Yuancheng Qin
{"title":"Strong acid- and irradiation-resistant nitrogen-rich covalent organic polymers with high iodine adsorption capacity","authors":"Weiwei Du , Cailing Ni , Chao Liu , Hewei Yan , Jun Zhu , Yumei Luo , Ye Tao , Ao Meng , Yuancheng Qin","doi":"10.1016/j.molliq.2024.126372","DOIUrl":null,"url":null,"abstract":"<div><div>The removal of radioactive iodine from nuclear waste is very important for the development of nuclear energy. Covalent organic polymers (COPs) have been widely investigated for iodine capture due to their simple operation, diverse structures, and abundant pores. However, the disposal of nuclear waste in a strongly acidic and radioactive environment is still a great challenge. Herein, three nitrogen-rich COPs were successfully designed and synthesized by Schiff-base polycondensation reactions. The high density of N atoms in triazines and imines enhanced the binding capacity of iodine molecules, with an optimal gas-phase iodine adsorption capacity of 4.98 g g<sup>−1</sup> and a liquid-phase iodine adsorption capacity of 1224.6 mg g<sup>−1</sup>. The backbone structure of the hydrazone bond connection and the introduction of thiophene effectively enhanced the stability of the TZ-COPs. The adsorption performance of TZ-2 was maintained after 6 M HNO<sub>3</sub> immersion and 100 kGy radiation irradiation, respectively. In addition, TZ-2 still has 92.32 % adsorption performance in five cycles, with excellent reversible regeneration ability. Therefore, this work is important for the preparation of nitrogen-rich COPs for the efficient and reversible removal of radioiodine from nuclear waste.</div></div>","PeriodicalId":371,"journal":{"name":"Journal of Molecular Liquids","volume":"415 ","pages":"Article 126372"},"PeriodicalIF":5.3000,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Liquids","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167732224024310","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The removal of radioactive iodine from nuclear waste is very important for the development of nuclear energy. Covalent organic polymers (COPs) have been widely investigated for iodine capture due to their simple operation, diverse structures, and abundant pores. However, the disposal of nuclear waste in a strongly acidic and radioactive environment is still a great challenge. Herein, three nitrogen-rich COPs were successfully designed and synthesized by Schiff-base polycondensation reactions. The high density of N atoms in triazines and imines enhanced the binding capacity of iodine molecules, with an optimal gas-phase iodine adsorption capacity of 4.98 g g−1 and a liquid-phase iodine adsorption capacity of 1224.6 mg g−1. The backbone structure of the hydrazone bond connection and the introduction of thiophene effectively enhanced the stability of the TZ-COPs. The adsorption performance of TZ-2 was maintained after 6 M HNO3 immersion and 100 kGy radiation irradiation, respectively. In addition, TZ-2 still has 92.32 % adsorption performance in five cycles, with excellent reversible regeneration ability. Therefore, this work is important for the preparation of nitrogen-rich COPs for the efficient and reversible removal of radioiodine from nuclear waste.
期刊介绍：
The journal includes papers in the following areas:
– Simple organic liquids and mixtures
– Ionic liquids
– Surfactant solutions (including micelles and vesicles) and liquid interfaces
– Colloidal solutions and nanoparticles
– Thermotropic and lyotropic liquid crystals
– Ferrofluids
– Water, aqueous solutions and other hydrogen-bonded liquids
– Lubricants, polymer solutions and melts
– Molten metals and salts
– Phase transitions and critical phenomena in liquids and confined fluids
– Self assembly in complex liquids.– Biomolecules in solution
The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include:
– Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.)
– Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.)
– Light scattering (Rayleigh, Brillouin, PCS, etc.)
– Dielectric relaxation
– X-ray and neutron scattering and diffraction.
Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
