CAJ | 학술논문

采用静电纺丝法制备了PVP/FeC6 H5 O7复合纳米纤维,并将复合纤维在500℃高温烧结3 h, X射线衍射分析(XRD)表明,烧结后的产物为正尖晶石结构的γ-Fe2O3晶体.扫描电子显微镜(SEM)观测结果表明,制得了直径均匀、连续的复合纳米纤维,其平均直径约为1000 nm；烧结后的γ-Fe2 O3纳米纤维保持了其连续性,但纤维发生了收缩,直径较烧结前小,平均约为600 nm.比表面积分析表明,γ-Fe2 O3纳米纤维比表面积为57.18 m2/g.气敏性能测试结果表明,230℃为γ-Fe2 O3纳米纤维检测丙酮气体的最佳工作温度.在此温度下,γ-Fe2O3纳米纤维对丙酮气体表现出高响应度[S=6.9, c(Acetone)=7.88×104 mg/m3]和线性度(7.88×102~1.58×105 mg/m3浓度范围内).同时,γ-Fe2O3纳米纤维气体传感器件还表现出良好的长期稳定性.
채용정전방사법제비료PVP/FeC6 H5 O7복합납미섬유,병장복합섬유재500℃고온소결3 h, X사선연사분석(XRD)표명,소결후적산물위정첨정석결구적γ-Fe2O3정체.소묘전자현미경(SEM)관측결과표명,제득료직경균균、련속적복합납미섬유,기평균직경약위1000 nm；소결후적γ-Fe2 O3납미섬유보지료기련속성,단섬유발생료수축,직경교소결전소,평균약위600 nm.비표면적분석표명,γ-Fe2 O3납미섬유비표면적위57.18 m2/g.기민성능측시결과표명,230℃위γ-Fe2 O3납미섬유검측병동기체적최가공작온도.재차온도하,γ-Fe2O3납미섬유대병동기체표현출고향응도[S=6.9, c(Acetone)=7.88×104 mg/m3]화선성도(7.88×102~1.58×105 mg/m3농도범위내).동시,γ-Fe2O3납미섬유기체전감기건환표현출량호적장기은정성.
PVP/FeC6 H5 O7 composite nanofibers were prepared via electrospinning method. After 3 h of calci-nations, the composite PVP/FeC6 H5 O7 nanofibers were turned to γ-Fe2 O3 nanofibers. X-ray diffraction ( XRD) , scanning electron microscopy( SEM) and the Brunauer-Emmett-Teller( BET) method were employed to characterize the products. Before calcinations, the composite nanofibers had smooth and uniform surfaces with an average diameter about 1000 nm. After calcinations, the nanofibers shrank but maintained the continuous structures with an average diameter about 600 nm. When used to detect acetone, sensor based onγ-Fe2O3 nanofibers exhibited high response, good linear dependence(7.88í102-1.58í105 mg/m3), fast response and recovery speed at 230 ℃. The sensor also showed good stability. These properties make theγ-Fe2 O3 nanofibers good candidates for acetone detection.