MOF-BBZ混合配体的合成及对海水中U（VI）的吸附

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Journal of Solid State Chemistry Pub Date : 2025-02-23 DOI:10.1016/j.jssc.2025.125277

Maomao Guo , Wenhui Zhang , Wenhua Pang , Zherui Zhang , Zhuangzhuang Xiong , Qizi Wu , Fuqiu Ma , Guixiang Wang

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引用次数: 0

摘要

从海水中高效提取铀需要具有高容量和选择性的吸附剂。以1,3-苯二甲酸（H2BDC）和1,3,5-苯三甲酸（H3BTC）为混合配体，采用一锅法合成了锆基金属有机骨架（MOF-BBZ）。通过FT-IR、TGA和XRD对其进行了结构表征。在pH为10时，MOF-BBZ对U（VI）的最大吸附量为361.6 mg/g (C0 = 50 mg/L,T = 298.15 K)， Freundlich等温线和拟二级动力学最能描述其吸附行为，而热力学分析表明吸附行为具有自发性（ΔG =−4.812 kJ/mol）和吸热性（ΔH = 19.055 kJ/mol）。最重要的是，MOF-BBZ在含有竞争离子（如Zn2+、Pb2+）的海水中保持了77.0%的U（VI）选择性，证明了其回收铀的实际潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Synthesis of mixed ligand MOF-BBZ and adsorption of U(VI) in seawater

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Synthesis of mixed ligand MOF-BBZ and adsorption of U(VI) in seawater

Efficient uranium extraction from seawater requires adsorbents with high capacity and selectivity. A zirconium-based metal-organic framework (MOF-BBZ) was synthesized via a one-pot method employing 1,3-benzenedicarboxylic acid (H₂BDC) and 1,3,5-benzenetricarboxylic acid (H₃BTC) as mixed ligands. Structural characterization by FT-IR, TGA, and XRD confirmed its robustness. At pH 10, MOF-BBZ achieved a maximum U(VI) adsorption capacity of 361.6 mg/g (C₀ = 50 mg/L,T = 298.15 K). The Freundlich isotherm and pseudo-second-order kinetics best described adsorption behavior, while thermodynamic analysis indicated spontaneity (ΔG = −4.812 kJ/mol) and endothermicity (ΔH = 19.055 kJ/mol). Crucially, MOF-BBZ maintained >77.0 % U(VI) selectivity in seawater containing competing ions (e.g., Zn²⁺, Pb²⁺), demonstrating its practical potential for uranium recovery.

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来源期刊

Journal of Solid State Chemistry 化学-无机化学与核化学

CiteScore

6.00

自引率

9.10%

发文量

848

审稿时长

25 days

期刊介绍： Covering major developments in the field of solid state chemistry and related areas such as ceramics and amorphous materials, the Journal of Solid State Chemistry features studies of chemical, structural, thermodynamic, electronic, magnetic, and optical properties and processes in solids.