精品文档---下载后可任意编辑TiO2 基复合材料制备及气敏性能讨论的开题报告摘要：本文以 TiO2 作为基础材料，利用化学合成方法制备了一系列 TiO2基复合材料，并讨论了其气敏性能。首先，采纳水热合成方法制备了一系列 TiO2/碳复合材料，其中碳来源于葡萄糖。通过 X 射线衍射（XRD）和透射电子显微镜（TEM）分析，证明了复合材料的形貌和结构。然后，通过气敏性能测试，发现TiO2/碳复合材料具有较高的响应和恢复速度，对氨气和二氧化硫气体有良好的响应能力。接着，利用沉积-浸渍法制备了 CuO/TiO2 复合材料。通过扫描电子显微镜（SEM）和能谱分析（EDS）证实了复合材料的形貌和元素组成。测试结果表明，CuO/TiO2 复合材料对乙醇、苯和二氧化硫气体具有很高的响应性能和较快的响应速度。最后，分别制备了 Ag/TiO2 和 Pt/TiO2 复合材料，并测试其气敏性能。结果表明，Ag/TiO2 和 Pt/TiO2 复合材料对甲苯和二氧化硫气体有较高的敏感度和选择性。关键词：TiO2 基复合材料，气敏性能，水热合成法，沉积-浸渍法，响应速度，选择性Abstract:In this paper, TiO2 was used as the basic material to prepare a series of TiO2-based composite materials by chemical synthesis method, and their gas sensing properties were studied.Firstly, a series of TiO2/carbon composites were prepared by hydrothermal synthesis method, in which carbon was derived from glucose. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were used to analyze the morphology and structure of the composite materials. Then, the gas sensing properties were tested, and it was found that TiO2/carbon composites had a high response and recovery speed, and had good response ability to ammonia and sulfur dioxide gases.Secondly, CuO/TiO2 composite materials were prepared by deposition-impregnation method. Scanning electron microscopy (SEM) and energy spectrum analysis (EDS) were 精品文档---下载后可任意编辑used to confirm the morphology and elemental composition of the composite materials. The test results showed that CuO/TiO2 composite materials had a high response and response speed to ethanol, benzene and sulfur dioxide gases.Finally, Ag/TiO2 and Pt/TiO2 composite materials were prepared respectively, and their gas sensing properties were tested. The results showed that Ag/TiO2 and Pt/TiO2 composite materials had high sensitivity and selectivity to toluene and sulfur dioxide gases.Keywords: TiO2-based composite materials, gas sensing properties, hydrothermal synthesis method, deposition-impregnation method, response speed, selectivity
