摘要
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(FESEM),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.
TiO2/LaFeO3 heterostructures were fabricated by electrospinning technique and hydrothermal syn- thesis method. The physieochemical 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 TiOJLaFeO3 heterostructures were analyzed and discussed.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第1期19-25,共7页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:20871023)
吉林省科技发展计划项目(批准号:20101549
20130102001JC)
吉林省教育厅项目(批准号:2013130
2013146)资助~~
