MOF-808和PCN-222催化降解CWAs的研究进展

Shaoxiong Wu, L. Wang, H. Zhu, Jing Liang, Liangqi Ge, Cong Li, Ting Miao, J. Li, Zhenxing Cheng
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引用次数: 2

摘要

化学战剂,如神经毒剂(GD和VX)和水疱剂(HD),对人类具有很强的毒性。近年来,锆基金属有机骨架材料被发现是一种有吸引力的化学战剂降解材料。其中,金属有机骨架-808 (MOF-808)和多孔配位网络-222 (PCN-222)效果最好。然而,很少有论文关注它们的实际应用。本文分别采用水相法和有机溶剂热法制备了MOF-808和PCN-222。研究了它们在实际净化条件下催化降解化学战剂的性能。结果表明,MOF-808在无缓冲溶液中对VX (10,000 mg L−1)具有较高的催化水解效能。PCN-222反应性较弱,半衰期(t1/2)为28.8 min。它们的不同性能可能源于Zr6节点和框架结构的不同连通性。结果表明,高浓度GD的水解需要强碱性缓冲液中和氢氟酸(HF)的水解产物,以避免催化剂中毒。当以H2O2代替O2作为氧化剂时,两种锆基金属有机骨架在不需要特殊光照的情况下,对HD的降解都具有有效的催化效能,适合实际应用,而HD的产物,如HDO2和V-HDO2,仍然具有发胶毒性。总的来说,通过水相合成制备的MOF-808对高浓度VX、GD和HD的降解效果良好,t1/2分别< 0.5、3.1和2.2 min,显示出了实际应用的潜力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Catalytic degradation of CWAs with MOF-808 and PCN-222: Toward practical application
Chemical warfare agents, such as nerve agents (GD and VX) and blister agents (HD), have strong toxicities to mankind. In recent years, zirconium-based metal-organic frameworks have been found to be attractive materials for chemical warfare agent degradation. Among them, metal-organic framework-808 (MOF-808) and porous coordination network-222 (PCN-222) were the best. However, few papers pay attention to their practical application. In this work, we prepared MOF-808 and PCN-222 using water phase and organic solvothermal methods, respectively. Their performance for the catalytic degradation of chemical warfare agents under practical decontamination conditions was studied. The results showed that MOF-808 displayed a high potency for catalytic hydrolysis of VX (10,000 mg L−1) in unbuffered solution. PCN-222 exhibited weaker reactivity with a half-life (t1/2) of 28.8 min. Their different performances might stem from the different connectivity of the Zr6 nodes and framework structures. The results illustrated that the hydrolysis of high-concentration GD required a strong alkaline buffer to neutralize the hydrolysis product of hydrofluoric acid (HF) to avoid catalyst poisoning. When H2O2 was used as the oxidant instead of O2, both zirconium-based metal-organic frameworks performed with effective catalytic potency for HD degradation without any special lighting and so was suitable for practical application, whereas the products obtained from HD, such as HDO2 and V-HDO2, still possessed vesicant toxicity. Overall, MOF-808 prepared via a water-phase synthesis performed with effective catalysis for the degradation of high-concentration VX, GD, and HD with t1/2 of < 0.5, 3.1 and 2.2 min, respectively, exhibiting its potential for practical applications.
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来源期刊
Journal of Chemical Research-s
Journal of Chemical Research-s 化学科学, 有机化学, 有机合成
自引率
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0
审稿时长
1 months
期刊介绍: The Journal of Chemical Research is a peer reviewed journal that publishes full-length review and research papers in all branches of experimental chemistry. The journal fills a niche by also publishing short papers, a format which favours particular types of work, e.g. the scope of new reagents or methodology, and the elucidation of the structure of novel compounds. Though welcome, short papers should not result in fragmentation of publication, they should describe a completed piece of work. The Journal is not intended as a vehicle for preliminary publications. The work must meet all the normal criteria for acceptance as regards scientific standards. Papers that contain extensive biological results or material relating to other areas of science may be diverted to more appropriate specialist journals. Areas of coverage include: Organic Chemistry; Inorganic Chemistry; Materials Chemistry; Crystallography; Computational Chemistry.
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