偏锡酸锌空心立方体的合成及其乙醇气敏性能

Fabrication of Zinc Stannate Hollow Cubes and Their Sensing Properties for Ethanol

采用简易的一步共沉淀法合成偏锡酸锌空心立方体.利用扫描电子、透射电子显微镜、X射线衍射、固体紫外、氮气吸附比表面测试等表征手段对该材料形貌和结构进行表征,结果表明,所合成的偏锡酸锌空心立方体边长约为1.4μm,立方体的壁厚约为210 nm,而且尺寸均匀.气敏性能测试研究表明,偏锡酸锌空心立方体材料对乙醇表现出优异的气敏性能,其最佳工作温度为175℃,并且对体积分数为百万分之一的乙醇气体的响应为1.7.因此,偏锡酸锌空心立方体材料可以做为一种优良的气敏材料.

Zinc stannate hollow cubes were successfully prepared via a simple one-step co-precipitation method, and the morphology and structure were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-vis diffuse reflectance spectra and Brunauer-Emmett-Teller. The results indicate that the zinc stannate is a kind of hollow cubic structure with aside length of 1.4 μm, and the wall thickness of the cubes is about 210 nm with uniform size. The tests show that the sensor based on the hollow cubic zinc stannates has excellent gas sensitivity to ethanol, and its response to volume fraction one millionth of ethanol gas is about 1.7 at the optimum working temperature of 175 ℃. Therefore, the hollow cubic zinc stannates can he used as an excellent gas-sensing material.