【作者】 陈祥； 林惠明； 曲凤玉；

【Author】 Xiang Chen;Huiming Lin;Fengyu Qu;College of Chemistry and Chemical Engineering,Harbin Normal University;

【机构】 哈尔滨师范大学化学化工学院；

【摘要】 通过静电纺丝法,以醋酸锌作为锌源和聚乙烯吡咯烷酮为增稠剂合成多孔氧化锌纳米纤维。通过调节醋酸锌的量,合成多种结构(纳米纤维,纳米管,管中纤维)的多孔氧化锌纳米纤维,并讨论了其合成机理。多孔氧化锌纳米纤维具有统一结构,直径约为200至300纳米,长度约几个微米。所有纤维都是由许多20–30纳米的氧化锌粒子组成,组装形成的多孔结构使样品具有大的表面积和高孔体积。并对样品进行了丙酮气敏性质的研究,结果显示了其对丙酮高的灵敏度和较低的探测极限,当丙酮浓度为500ppm时,其灵敏度达到243.3,最低可以探测10ppm丙酮,响应恢复时间分别为7s,17s。更多还原

【Abstract】 Porous ZnO nanofibers were prepared through the electrospun method using zinc acetate as zinc source and polyvinylpyrrolidone as thickener agent. Under adjusting the amount of zinc acetate, the synthesized porous ZnO nanofibers show various structures(fiber, tube, and fiber-in-tube). And the formation mechanism was discussed in detail. These porous ZnO samples show the uniform structure about 200 to 300 nm in diameter and several microns in length. All the fibers are composed by many Zn O nanoparticals(20-30 nm) that assemble to form the porous structure and induce the large surface area and high pore volume of the sample. These porous Zn O nanofibers were configured as high performance sensors for acetone sensing, showing high sensitivity(S = 243.3 at 500 ppm), low detection limit(10 ppm), fast response/ recovery(7/17 s), and very good selectivity.更多还原