CAJ | 학술논문

采用静电纺丝法,分别选取不同的有机溶剂PVP,PMMA,制备了 SnO 2的有机物纳米纤维。在600℃温度下退火后,得到不同形貌的 SnO 2纳米材料(SnO 2纳米纤维和 SnO 2纳米颗粒)。分别通过 XRD, SEM,TEM,BET 等表征方法对材料的微结构进行了表征,并分别制备了基于 SnO 2纳米纤维和 SnO 2纳米颗粒的气敏元件,测试了这些元件对(0．5~50)×10－6的甲醛气体的敏感性能。测试结果表明,在(0．5~50)×10－6甲醛浓度范围内,SnO 2纳米颗粒气敏元件比SnO 2纳米纤维气敏元件表现出更低的工作温度、更高的响应灵敏度和略长的响应及恢复时间。两种元件都对甲醛表现出良好的选择性。最后,分析了 SnO 2纳米材料对甲醛的吸附机理。
채용정전방사법,분별선취불동적유궤용제PVP,PMMA,제비료 SnO 2적유궤물납미섬유。재600℃온도하퇴화후,득도불동형모적 SnO 2납미재료(SnO 2납미섬유화 SnO 2납미과립)。분별통과 XRD, SEM,TEM,BET 등표정방법대재료적미결구진행료표정,병분별제비료기우 SnO 2납미섬유화 SnO 2납미과립적기민원건,측시료저사원건대(0．5~50)×10－6적갑철기체적민감성능。측시결과표명,재(0．5~50)×10－6갑철농도범위내,SnO 2납미과립기민원건비SnO 2납미섬유기민원건표현출경저적공작온도、경고적향응령민도화략장적향응급회복시간。량충원건도대갑철표현출량호적선택성。최후,분석료 SnO 2납미재료대갑철적흡부궤리。
SnO 2 nanomaterials were synthesized based on an electrospinning method by using different organic solvents (PVP,PMMA).After annealing at temperature of 600 ℃,different morphology SnO 2 nanomaterials (SnO 2 nanofibers and SnO 2 nanoparticles)were obtained.The morphology and structure of SnO 2 nanomaterials were analyzed by using XRD,SEM and TEM.The specific surface area and pore distribution of SnO 2 nanomate-rials were analyzed by BET.The SnO 2 nanoparticlesusing organic solvents PMMA showed more pores and big-ger specific surface area than SnO 2 nanofibersusing organic solvents PVP.The gas sensing properties of the SnO 2 nanomaterials to formaldehyde were measured in formaldehyde concentration range of 0.5-50×10 -6 .The SnO 2 nanoparticlesbased sensorexhibited low operating temperature,high response valuesand longresponse and recover time.Cross-responses of the SnO 2 nanomaterials sensors were tested.BothThe SnO 2 nanoparticlessensor and SnO 2 nanofibers sensor showed goodselectivity to formaldehyde.The sensing mechanism of the SnO 2 nano-materials gas sensor was briefly discussed.