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通过钛酸丁酯与氢氧化钠浓溶液的两步水热反应合成出宽度为20～240nm、厚度为10～40nm、长度达几十微米的单一物相的Na2Ti3O7纳米带。用X-射线衍射和电子显微镜分别表征了它们的结构和形貌。这些纳米带被加工成化学电阻型传感器以测量气敏特性。测试表明在350～400℃之间对丙酮、乙醇和二硫化碳具有明显感应,而对一氧化碳、苯、氨气和30%的甲醛水溶液几乎不敏感。用化学吸附模型解释其气敏机理。
A single-phase Na2Ti3O7 nanobelts with a width of 20 ~ 240nm, a thickness of 10 ~ 40nm and a length of tens of micrometers were synthesized by a two-step hydrothermal reaction of butyl titanate and sodium hydroxide concentrated solution. Their structures and morphologies were characterized by X-ray diffraction and electron microscopy. These nanoribbons are processed into chemical resistance sensors to measure gas sensing properties. Tests showed significant sensitivities to acetone, ethanol and carbon disulfide between 350-400 ° C, while being almost insensitive to carbon monoxide, benzene, ammonia and 30% aqueous formaldehyde. The chemical adsorption model is used to explain its gas sensing mechanism.