Department of Chemistry, National Tsing Hua University, Hsinchu, Taiwan.
Langmuir. 2012 Aug 7;28(31):11639-45. doi: 10.1021/la3015892. Epub 2012 Jul 26.
We have prepared nanocomposites of polymers and platelet CMK-5-like carbon and have demonstrated their superior performance for gravimetric gas detection. The zirconium-containing platelet SBA-15 was used as hard template to prepare CMK-5-like carbon, which was then applied as a lightweight and high-surface-area scaffold for the growth of polymers by radical polymerization. Mesoporous nanocomposites composed of four different polymers were used as sensing materials for surface acoustic wave devices to detect ppm-level ammonia gas. The sensors showed much better sensitivity and reversibility than those coated with dense polymer films, and the sensor array could still generate a characteristic pattern for the analyte with a concentration of 16 ppm. The results show that the nanocomposite sensing materials are promising for highly sensitive gravimetric-type electronic nose applications.
我们制备了聚合物和板状 CMK-5 样碳的纳米复合材料，并证明了它们在重量型气体检测方面的优异性能。含锆的板状 SBA-15 被用作硬模板来制备 CMK-5 样碳，然后将其用作聚合物自由基聚合的轻量高表面积支架。由四种不同聚合物组成的介孔纳米复合材料被用作表面声波器件的传感材料，以检测 ppm 级别的氨气。与涂覆致密聚合物膜的传感器相比，这些传感器具有更高的灵敏度和可恢复性，并且传感器阵列仍然可以为浓度为 16 ppm 的分析物产生特征图案。结果表明，纳米复合传感材料有望在高灵敏度重量型电子鼻应用中得到广泛应用。
