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具有大比表面积和丰富表面缺陷的三维多孔纳米材料在气体传感中极具潜力.通过液相共沉淀法制备了三维微米花状锌基前驱物,于400℃热处理即转化为ZnO多孔微米花,它继承了锌基前驱物的外观形貌,但片状“花瓣”的表面形成大量无序孔洞,使得ZnO多孔微米花具有大比表面积(31.3 m2?g-1)和丰富的表面缺陷.鉴于ZnO多孔微米花的独特微观形貌结构,用其构建的气体传感器对乙醇气体表现出最佳工作温度低、灵敏度高、响应(恢复)快速等优点,与文献报道的ZnO基乙醇气体传感器相比处于领先水平.结合其制备过程简单、成本低等优点,ZnO多孔微米花在气体传感领域有潜在的应用价值.
The three-dimensional porous nanomaterials with large specific surface area and abundant surface defects have great potential in gas sensing.The three-dimensional micron flower-like zinc-based precursors were prepared by liquid coprecipitation method and were transformed into ZnO porous micron flowers , Which inherited the appearance of zinc-based precursors. However, the surface of the flaky “petal” formed a large number of disordered pores, making the ZnO porous flower with large surface area (31.3 m2? G-1) and abundant surface In view of the unique microstructure of porous ZnO flower, the gas sensor constructed by it has the advantages of low working temperature, high sensitivity and fast response (recovering) to the ethanol gas. Compared with ZnO-based ethanol gas Sensor compared to the leading level.With its simple preparation process, low cost, porous ZnO flower has potential applications in the field of gas sensing.