A long period grating (LPG) modified with a mesoporous film infused with a calixarene as a functional compound was employed for the detection of individual volatile organic compounds (VOCs) and their mixtures. The mesoporous film consisted of an inorganic part, SiO nanoparticles (NPs), along with an organic moiety of poly(allylamine hydrochloride) polycation PAH, which was finally infused with the functional compound, p-sulphanato calix[4]arene (CA[4]) or p-sulphanato calix[8]arene (CA[8]). The LPG sensor was designed to operate at the phase matching turning point to provide the highest sensitivity. The sensing mechanism is based on the measurement of the refractive index (RI) change induced by a complex of the VOCs with calixarene. The LPG, modified with a coating of 5 cycles of (SiO NPs/PAH) and infused with CA[4] or CA[8], was exposed to chloroform, benzene, toluene and acetone vapours. The British Standards test of the VOCs emissions from material (BS EN ISO 16000-9:2006) was used to test the LPG sensor performance.
展开▼
机译:用掺入杯芳烃作为功能化合物的中孔膜改性的长周期光栅(LPG)用于检测各个挥发性有机化合物(VOC)及其混合物。中孔膜由无机部分SiO纳米颗粒(NPs)和聚(烯丙胺盐酸盐)聚阳离子PAH的有机部分组成,最后注入功能化合物p-sulphanato calix [4] arene(CA [4 ])或p-sulphanato calix [8] arene(CA [8])。 LPG传感器设计为在相位匹配转折点上运行,以提供最高的灵敏度。感测机制基于对VOC与杯芳烃的复合物引起的折射率(RI)变化的测量。将经过5个循环(SiO NPs / PAH)涂层修饰并注入CA [4]或CA [8]的LPG暴露于氯仿,苯,甲苯和丙酮蒸气中。材料的VOC排放的英国标准测试(BS EN ISO 16000-9:2006)用于测试LPG传感器的性能。
展开▼