有机磷神经毒剂是通过抑制神经递质酶破坏神经肌肉传递的有毒化合物,乙酰胆碱酯酶,导致快速死亡。使用水热工艺合成了一种混合复合材料,用于早期检测甲基膦酸二甲酯(DMMP),G系列神经毒剂的模拟物,沙林.使用石英晶体微天平(QCM)和表面声波(SAW)传感器作为检测器。氮掺杂多壁碳纳米管(N-MWCNTs),氧化钴(Co3O4),与N-MWCNT@Co3O4进行比较以检测25-150ppm的DMMP浓度。在25ppm时,N-MWCNT的差分频率(Δf),Co3O4和N-MWCNT@Co3O4传感器分别为5.8、2.3和99.5Hz,分别。选择性结果揭示了对DMMP的偏好而不是潜在的干扰。N-MWCNT的测定系数(R2),用于检测25-150ppmDMMP的Co3O4和N-MWCNT@Co3O4传感器分别为0.983、0.986和0.999。N-MWCNT的响应时间,用于检测100ppmDMMP的Co3O4和N-MWCNT@Co3O4传感器分别为25、27和34s,分别,而相应的回收时间分别为85、105和181s。重复性结果表明,在100ppm的固定DMMP浓度下,可逆的吸附和解吸现象。这些独特的发现表明,合成材料可用于检测有机磷神经毒剂。
Organophosphorus nerve agents are toxic compounds that disrupt neuromuscular transmission by inhibiting the neurotransmitter enzyme, acetylcholinesterase, leading to rapid death. A hybrid composite was synthesized using a hydrothermal process for the early detection of dimethyl methyl phosphonate (DMMP), a simulant of the G-series nerve agent, sarin. Quartz crystal microbalance (QCM) and surface acoustic wave (SAW) sensors were used as detectors. Nitrogen-doped multiwalled carbon nanotubes (N-MWCNTs), cobalt oxide (Co3O4), and N-MWCNT@Co3O4 were compared to detect DMMP concentrations of 25-150 ppm. At 25 ppm, the differential frequencies (Δf) of the N-MWCNT, Co3O4, and N-MWCNT@Co3O4 sensors were 5.8, 2.3, and 99.5 Hz, respectively. The selectivity results revealed a preference for the DMMP rather than potential interference. The coefficients of determination (R2) of the N-MWCNT, Co3O4, and N-MWCNT@Co3O4 sensors for detecting 25-150 ppm DMMP were 0.983, 0.986, and 0.999, respectively. The response times of the N-MWCNT, Co3O4, and N-MWCNT@Co3O4 sensors for detecting 100 ppm DMMP were 25, 27, and 34 s, respectively, while the corresponding recovery times were 85, 105, and 181 s. The repeatability results revealed the reversible adsorption and desorption phenomena for the fixed DMMP concentration of 100 ppm. These unique findings show that synthesized materials can be used to detect organophosphorus nerve agents.