Abstract As porous crystal materials, metal-organic frameworks (MOFs) have attracted wide attention in the field of environmental remediation. In this study, a trivalent iron-tartaric acid metal-organic framework (T2-MOF) was successfully synthesized using the inexpensive raw materials ferric chloride (FeCl3.6H2O) and tartaric acid (C4H6O6). The physical and chemical properties of T2-MOF were studied by using X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy and Brunauer–Emmett–Teller. After that, T2-MOF was used as a catalyst for catalytic ozonation of succinonitrile. The results show that T2-MOF has obvious crystal characteristics and uniform structure. In addition, T2-MOF exhibits strong catalytic performance in ozonation of succinonitrile. The results indicate that the chemical oxygen demand (COD) removal rate is affected by various operating parameters including catalyst characteristics dosages and initial pH values. In the ozonation with 30 mg L−1 T2-MOF, the COD removal rate of 100 mg L−1 succinonitrile reached 73.1% (±4.6%) within 180 min, which was 67.3% (±4.4%) higher than that obtained in the process without catalyst. T2-MOF maintained strong catalytic performance with the pH range of 3.0–7.0. By monitoring the Fe2+ concentration at different reaction time, it was found that the homogeneous catalysis occurred simultaneously with the heterogeneous catalysis.

中文翻译：

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三价铁-酒石酸金属有机骨架催化丁二腈臭氧化

摘要作为多孔晶体材料，金属有机框架（MOF）在环境修复领域引起了广泛关注。本研究利用廉价的原料氯化铁（FeCl3.6H2O）和酒石酸（C4H6O6）成功合成了三价铁-酒石酸金属有机骨架（T2-MOF）。利用X射线衍射、傅里叶变换红外光谱、扫描电子显微镜、能量色散X射线光谱、X射线光电子能谱和Brunauer-Emmett-Teller研究了T2-MOF的物理和化学性质。之后，T2-MOF被用作丁二腈催化臭氧化的催化剂。结果表明，T2-MOF具有明显的晶体特征和均匀的结构。此外，T2-MOF在丁二腈的臭氧化反应中表现出很强的催化性能。结果表明，化学需氧量 (COD) 去除率受到各种操作参数的影响，包括催化剂特性剂量和初始 pH 值。在30 mg L−1 T2-MOF的臭氧氧化中，100 mg L−1丁二腈的COD去除率在180 min内达到73.1%（±4.6%），比100 mg L−1丁二腈的COD去除率提高了67.3%（±4.4%）。该过程无需催化剂。T2-MOF在pH范围3.0-7.0下保持了较强的催化性能。通过监测不同反应时间的Fe2+浓度，发现均相催化与多相催化同时发生。