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Visual detection of peroxide-based explosives using novel mimetic Ag nanoparticle/ZnMOF nanocomposite
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2018-08-06 , DOI: 10.1016/j.jhazmat.2018.08.013
Nafiseh Bagheri , Alireza Khataee , Javad Hassanzadeh , Biuck Habibi

A simple and selective colorimetric method for the detection of perilous peroxide explosives was developed using the peroxidase mimetic activity of silver nanoparticles/flake-like zinc metal-organic framework nanocomposite (Ag@ZnMOF). The synthesis of Ag@ZnMOF contained the formation of silver nanoparticles (AgNPs) inside the fine pores of Zn metal-organic framework (ZnMOF). High reactive AgNPs as well as great surface area of MOFs provided a synergetic and high improved catalytic activity for the composite which was studied as a peroxidase mimic in hydrogen peroxide (H2O2)-based oxidations. The achieved system was used for detection of Triacetone triperoxide (TATP) as one of the most hazardous peroxide explosives. TATP was decomposed in an acidic condition to generate H2O2, which was then applied to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of the Ag@ZnMOF as a catalyst. This reaction led to the production of well-known blue colored charge transfer complex (oxTMB), which was recognized by the colorimetric technique. A linear relationship was obtained between the absorption intensity of the produced blue solution and the TATP concentration in the range of 0.4-15 mg L-1, with a detection limit of 0.1 mg L-1. A portable test kit was prepared using the same reagents for TATP measurement in real samples.



中文翻译:

使用新型模拟Ag纳米颗粒/ ZnMOF纳米复合材料目视检测基于过氧化物的炸药

利用银纳米颗粒/片状锌金属有机骨架纳米复合材料(Ag @ ZnMOF)的过氧化物酶模拟活性,开发了一种简单,选择性的比色法检测危险的过氧化物炸药。Ag @ ZnMOF的合成包含在锌金属有机骨架(ZnMOF)的细孔内形成银纳米颗粒(AgNPs)。高反应性的AgNPs和较大的MOF表面积为复合材料提供了协同作用和高的催化活性,这是作为过氧化物酶模拟物在基于过氧化氢(H 2 O 2)的氧化中研究的。所获得的系统用于检测三丙酮三过氧化物(TATP),这是最危险的过氧化物炸药之一。TATP在酸性条件下分解产生H 2然后在Ag @ ZnMOF作为催化剂存在下,将O 2应用于氧化3,3',5,5'-四甲基联苯胺(TMB)。该反应导致了众所周知的蓝色电荷转移复合物(oxTMB)的生产,该复合物已通过比色技术得到了认可。所产生的蓝色溶液的吸收强度与TATP浓度在0.4-15 mg L -1范围内,检测限为0.1 mg L -1之间具有线性关系。使用相同的试剂制备了便携式测试试剂盒,用于实际样品中的TATP测量。

更新日期:2018-08-06
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