超声-气相联合扩散法快速合成ZIF-8用于硝基芳香化合物炸药的传感  

Rapid synthesis of ZIF-8 by a combined ultrasound-vapor phase diffusion method for nitroaromatic explosives sensing

作　　者：赵轶鸣 胡钟飞 陈宇[1] 丁玉洁[1] ZHAO Yiming;HU Zhongfei;CHEN Yu;DING Yujie(School of Chemical&Environmental Engineering,Anhui Polytechnic University,Wuhu 241000)

机构地区：[1]安徽工程大学化学与环境工程学院,芜湖241000

出　　处：《分析试验室》2022年第2期135-140,共6页Chinese Journal of Analysis Laboratory

基　　金：国家自然科学基金(21405001);高校优秀青年骨干人才国外访问研修项目(gxgwfx2019043);大学生创新创业基金(201515363056,2016103630046,201710363182,201810363184)资助。

摘　　要：三维微孔沸石咪唑基骨架(ZIF-8)纳米晶通过超声-气相联合扩散法快速合成。对该纳米晶进行荧光研究表明,纳米晶对硝基芳香化合物炸药具有良好的荧光淬灭能力。通过建立的Stern-Volmer方程,在1×10^(-4)-8×10^(-4)mol/L范围内,每种炸药的浓度与纳米晶的荧光淬灭程度呈线性关系。对于2,4,6-三硝基苯酚(TNP)、硝基苯(NB)、4-硝基甲苯(4-NT)、1,3-二硝基苯(1,3-DNB)、2,4-二硝基甲苯(2,4-DNT)和2,6-二硝基甲苯(2,6-DNT),计算淬灭常数值分别为2.46×10^(4),3.08×10^(3),8.52×10^(3),2.64×10^(3),2.45×10^(3)和3.66×10^(3)(mol/L)^(-1),这个结果表明,该材料对各淬灭剂的灵敏性依次为TNP>4-NT>2,6-DNT>NB>1,3-DNB>2,4-DNT。因此,ZIF-8可以作为一种出色的荧光传感器,对硝基芳香化合物炸药进行选择性检测。Three-dimensional microporous zeolitic imidazolate framework(ZIF-8)nanocrystals were rapidly synthesized via combining ultrasound with vapor phase diffusion method.The fluorescent study indicated that the nanocrystals owned a good quenching ability for nitroaromatic explosives.By constructing Stern-Volmer equations,the linear relationships were obtained between the extent of fluorescence quenching and the concentrations of nitroaromatic explosives ranging from 1×10^(-4)to 8×10^(-4)mol/L.For 2,4,6-trinitrophenol(TNP),nitrobenzene(NB),4-nitrotoluene(4-NT),1,3-dinitrobenzene(1,3-DNB),2,4-dinitrotoluene(2,4-DNT)and 2,6-dinitrotoluene(2,6-DNT),the calculated values of quenching constants were 2.46×10^(4),3.08×10^(3),8.52×10^(3),2.64×10^(3),2.45×10^(3)and 3.66×10^(3)(mol/L)^(-1),respectively.The results showed that the sensitive order for all the quenching agents was TNP>4-NT>2,6-DNT>NB>1,3-DNB>2,4-DNT.Therefore,the ZIF-8 can act as an outstanding sensor for specific selective identification and quantification of nitroaromatic explosives.

关 键 词：金属有机框架 ZIF-8 硝基芳香化合物炸药 TNP 荧光传感器 

分 类 号：O657.3[理学—分析化学]