CAJ | 학술논문

利用静电纺丝技术及水热合成法制备了TiO2/LaFeO3异质结构.采用场发射扫描电子显微镜( FE-SEM), X射线衍射(XRD),傅里叶变换红外(FTIR)光谱和紫外-可见漫反射光谱(UV-Vis)等手段对TiO2/LaFeO3微纳米纤维的结构和表面形态进行表征.通过亚甲基蓝( MB)光降解反应研究了其光催化性能.结果表明,不完全碳化TiO2纤维表面的缺陷位点是LaFeO3纳米粒子的有利生长点. TiO2/LaFeO3异质结材料的带隙明显窄于TiO2,光催化活性得到提高；经140 min紫外光照射后, TiO2/LaFeO3异质结催化剂对MB的降解率为65.34%,分析和探讨了其光催化机理.
이용정전방사기술급수열합성법제비료TiO2/LaFeO3이질결구.채용장발사소묘전자현미경( FE-SEM), X사선연사(XRD),부리협변환홍외(FTIR)광보화자외-가견만반사광보(UV-Vis)등수단대TiO2/LaFeO3미납미섬유적결구화표면형태진행표정.통과아갑기람( MB)광강해반응연구료기광최화성능.결과표명,불완전탄화TiO2섬유표면적결함위점시LaFeO3납미입자적유리생장점. TiO2/LaFeO3이질결재료적대극명현착우TiO2,광최화활성득도제고；경140 min자외광조사후, TiO2/LaFeO3이질결최화제대MB적강해솔위65.34%,분석화탐토료기광최화궤리.
TiO2/LaFeO3 heterostructures were fabricated by electrospinning technique and hydrothermal syn-thesis method. The physicochemical properties of the catalysts were characterized by scanning electron micros-copy ( FE-SEM ) , X-ray diffraction ( XRD ) , Fourier transform infrared spectroscopy ( FTIR ) and ultraviolet-visible diffuse reflectance spectra(UV-Vis). The photocatalytic activity of TiO2/LaFeO3 micro-nanofibers to-ward the decomposition of methylene blue( MB) was investigated. The results indicate that defect sites of in-completely carbonized TiO2 fibers are favorable for the growth of LaFeO3 nanoparticles. The band gap of TiO2/LaFeO3 heterostructures is lower than TiO2 improving the photocatalytic activity. After 140 min TiO2/LaFeO3 heterostructures exhibited 65.34% for MB under UV light, and the photocatalytic mechanism of TiO2/LaFeO3 heterostructures were analyzed and discussed.