摘要
Efficient chemicalwarfare agents(CWAs)detection is required to protect people from the cWAs in war and terrorism.In this work,a Pd-doped SnO_(2)nanoparticles-based gas sensor was developed to detect a nerve agent simulant named methyl salicylate.The sensing measurements of methyl salicylate under different Pd doping amounts found that the 0.5 at.%Pd-doped SnO_(2)exhibited a significant improvement in the detection of methyl salicylate at the ppb(1ppb=10-9)level,and the response value to 160 ppb methyl salicylate is 0.72 at 250℃.Compared with the pure SnO_(2),the response value is increased by 4.5 times,which could be attributed to the influence of the noble metal Pd on the oxygen state and its catalytic effect.In addition,the 0.5at.%Pd-doped SnO_(2)sensor still has an obvious response to 16ppb methyl salicylate with a response value of 0.13,indicating the lower detection limit of the sensor.
基金
supported by the Science and Technology on Aerospace Chemical Power Laboratory,Hubei Institute of Aerospace Chemical Technology(U20B2018)
the Open Research Fund Program of Science and Technology on Aerospace Chemical Power Laboratory(STACPL320201B02 and STACPL320181B03-1)
the National Natural Science Foundation of China(Nos.61971204 and 51902114).
