CAJ | 학술논문

采用溶剂热法以WCl6作为前体合成出了一维和二维的钨氧化物纳米结构,研究了反应溶剂和前体浓度对钨氧化物物相和形貌的影响并评价了各种钨氧化物纳米结构对NO2气体的敏感性能.XRD、SEM、TEM和XPS的表征结果表明,通过改变溶剂和调整WCl浓度,可分别获得单斜的W18O49纳米棒、W18O49纳米线和WO3纳米片结构.气敏性能测试结果表明,钨氧化物纳米结构对NO2气体表现出良好的可逆性,与W18O49纳米棒和WO3纳米片相比,W18O49纳米线对NO2具有更高的灵敏度.
채용용제열법이WCl6작위전체합성출료일유화이유적오양화물납미결구,연구료반응용제화전체농도대오양화물물상화형모적영향병평개료각충오양화물납미결구대NO2기체적민감성능.XRD、SEM、TEM화XPS적표정결과표명,통과개변용제화조정WCl농도,가분별획득단사적W18O49납미봉、W18O49납미선화WO3납미편결구.기민성능측시결과표명,오양화물납미결구대NO2기체표현출량호적가역성,여W18O49납미봉화WO3납미편상비,W18O49납미선대NO2구유경고적령민도.
One- and two-dimensional tungsten oxide nanostructures were synthesized by solvothermal method using tungsten hexachloride (WC16) as the precursor. The effects of the solvent and the concentration of WC16 on the phase and the morphology of the as-synthesized tungsten oxide nanostructures were investigated and the NOr sensing properties were evaluated. X-ray diffraction, field emission scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy were employed to characterize the as-synthesized products and the results indicate that the W18O49 nanorod, W18O49 nanowire and WO3 nanosheet with monoclinic structure can be formed by adjusting the solvent and WC16 concentration. The NO2-sensing properties measurements show that the synthesized tungsten oxides have reversible response to NO2 at different concentrations. In comparison with WO3 nanosheet or W18O49 nanorod, the W18O49 nanowire exhibits much higher response to NO2 gas.