中文摘要：

采用水热法合成了类积木状ZnO纳米结构，利用x射线衍射仪（XRD）、X射线能谱分析仪（EDS）和扫描电子显微镜（SEM）对制备的ZnO纳米结构的物相、化学组分及微观形貌进行了表征与分析。对基于ZnO纳米结构的气体传感器进行甲烷气敏特性测试，测试结果表明：该传感器的最佳工作电压为5V，在该电压下对体积分数为200×10-6气体的灵敏度可高达55．4％，最低检测限为1×10-6

英文摘要：

Block-building-like ZnO nanostructure is synthesized by hydrothermal method, and the phase, chemical composition and micro morphology of the prepared ZnO nanostructure have been characterized and analyzed using X-ray diffraction （ XRD ）, energy dispersive spectroscopy （EDS） and scanning electron microscope （ SEM ）. Methane gas sensitive properties of gas sensor are tested based on ZnO nanostructure, and test result proves that the optimum operating voltage is 5 V, and the maximum sensitivity is 55.4 % to volume fraction 200 ×10-6 methane and the lowest detection limit is 1×10-6.