【摘要】：利用聚乙烯吡咯烷酮(PVP)作為表面活性劑,將四氯化錫(SnCl_4)溶解在甲醇溶液中,再通過溶劑熱法,制備了多孔氧化錫(SnO_2)納米球。采用X射線衍射(XRD)儀和掃描電子顯微鏡(SEM)對合成材料的結(jié)構(gòu)和形貌進(jìn)行了表征。結(jié)果表明,SnO_2納米球?yàn)榉植季鶆虻亩嗫浊颉Ｍ瑫r,采用旁熱式氣敏元件結(jié)構(gòu)對樣品進(jìn)行氫氣(H_2)敏感性能研究,測試結(jié)果證明制作的氣體傳感器對氫氣表現(xiàn)出良好的氣敏特性,在最佳工作溫度250℃下對體積分?jǐn)?shù)10~(-4)氫氣的響應(yīng)可達(dá)到6,最低體積分?jǐn)?shù)檢測極限為5×10~(-6),并且響應(yīng)時間和恢復(fù)時間分別為2 s和4 s。
[Abstract]:Porous tin oxide (SnO_2) nanospheres were prepared by solvothermal method by dissolving tin tetrachloride (SnCl_4) in methanol solution using polyvinylpyrrolidone (PVP) as surfactant. The structure and morphology of the synthesized materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The results show that the SnO_2 nanospheres are porous spheres with uniform distribution. At the same time, the structure of the gas sensor is used to study the hydrogen sensitivity of the sample. The test results show that the gas sensor has good gas sensitivity to hydrogen. At the optimum working temperature of 250 鈩，

本文編號：2464982