摘要
利用静电纺丝技术结合高温煅烧方法制备了一维中空多孔结构的In2O3无机纳米纤维。采用热重分析仪(TGA)测试了前驱体复合纳米纤维在热处理过程中物质的质量变化;利用X射线衍射仪(XRD)确认产物的晶型;借助傅里叶红外变换光谱仪(FTIR)分析煅烧前后产物官能团的变化;利用扫描电镜(SEM)和透射电镜(TEM)观察纳米纤维的微观形貌和结构,分析无机纳米纤维中空多孔结构的形成机理;利用荧光分光光度计测试了In2O3纳米纤维光致发光性能。结果表明,当In(NO3)3·4.5H2O/PVP=30%时,静电纺前驱体复合纳米纤维成型良好,且经高温煅烧后仍能保持纤维结构,但纤维直径明显减小;组成纳米纤维的In2O3纳米颗粒均为立方铁锰矿型,平均粒径大小约为27nm;在室温下,In2O3纳米纤维经250nm光激发后在505nm处出现较强的绿光发射峰。
One-dimensional In2 O3 nanofibers with hollow porous structure were prepared by electrospinning and thermal treatment.Thermogravimetry (TGA)was used to analyze the quality changes of precursor composite nanofibers during heat treatment process.X-ray diffractometry (XRD)was used to distinguish the crystal structures of products.The changes of functional groups of precursor composite nanofibers and In2 O3 nanofi-bers were analyzed by Fourier transform infrared spectroscopy(FT-IR).The morphology and structure of the nanofibers were characterized by scanning electron microscopy (SEM)and transmission electron microscopy (TEM).Fianlly,the photoluminescence property of In2 O3 was tested by fluorescence spectrophotometer.The experimental results showed that when In(NO3 )3 ·4.5 H2 O/PVP=30%,the formation of precursor composite nanofibers was favorable,and the products under high calcination temperature still remained fibrous structure, but the diameters of fibers were obviously reduced.In2 O3 nanoparticles existing in In2 O3 nanofibers all had cu-bic bixbyite structure.The average particle size was about 27 nm.A strong green photoluminescence with peak at 505 nm was observed in the In2 O3 nanofibers upon excitation at 250 nm at room temperature.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第16期16096-16100,16106,共6页
Journal of Functional Materials
基金
国家高技术研究发展计划(863计划)资助项目(2012AA030313)
教育部长江学者和创新团队发展计划资助项目(IRT1135)
江苏省产学研联合创新基金资助项目(BY2012068)
江苏省科技支撑计划(工业)资助项目(SBE201201094)
江苏高校优势学科建设工程资助项目
江苏省2013年度普通高校研究生科研创新计划资助项目(CXLX13_742)
