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

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(T...

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

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^-4to 8×10^-4mol/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 2.46×10⁴,3.08×10³,8.52×10³,2.64×10³,2.45×10³and 3.66×10³(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.