Construction Of Polyoxometalates Functionalized Nano Sensor Array And Mechanism Study On Sensitive Of Trace Nitrogen-free Explosives

Anti-terrorism in the western region is related to China's national defense security,social stability and the belt and road initiative's strategic implementation.The development of sensing materials for common explosives or explosive precursors in the western region is of great significance to maintain the long-term stability and economic development of the country.Starting from the selection of sensing materials and the construction of sensors,this paper takes trace nitrogen-free explosive gas as the main research object,and develops three kinds of sensors respectively to realize the identification detection of nitrogen-free explosive and other five common explosives.First,ZnO and polyacid are doped by coordination interaction,and a group of sensor arrays are constructed to realize the identification of trace explosive gas TNT?2,4,6-trinitrotoluene?,DNT?2,4-dinitrotoluene?,Teryl?Terkel?,PA?picric acid?,RDX?hexagen?and TATP?triacetone triperoxide?.Secondly,a TiO₂/PW₁₁sensor chip is constructed by in-situ grafting method,and high sensitivity detection of explosive gases TNT,DNT,Teryl,PA,RDX and TATP is realized by adjusting light intensity.Thirdly,polyacid,Au NCs and PPV are doped respectively and their responses to trace nitrogen-free explosive gas are compared.The results show that the sensor constructed by polyacid doped PPV has no response to explosive gas.Therefore,the sensor constructed by Au NCs/PPV with higher performance is selected to achieve the purpose of identifying and detecting trace explosive gas TNT,DNT,Teryl,PA,RDX and TATP.