锐钛矿型TiO_2纳米管的离子液体辅助水热合成及紫外光催化活性  

Ionic Liquid-assisted Synthesis of Anatase TiO_2 Nanotubes and Their UV Light Photocatalytic Activities

作　　者：武丽艳[1] 刘治芳 秦清[1] 曹亚安[2] 郑文君[1] 

机构地区：[1]南开大学化学学院材料化学系,先进能源材料化学教育部重点实验室,天津化学化工协同创新中心,天津300071 [2]南开大学弱光非线性光子学教育部重点实验,泰达应用物理学院,天津300457

出　　处：《高等学校化学学报》2014年第5期934-940,共7页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21073095;21371101);国家'111'计划项目(批准号:B12015)资助~~

摘　　要：在离子液体[Bmim]OH辅助的水热条件下合成了结晶度较好的偏钛酸纳米管,经470℃煅烧2 h,可转变为锐钛矿型TiO2纳米管.对产物的物相、形貌和比表面积等进行了表征.结果表明,锐钛矿型TiO2纳米管的比表面积约为355 m2/g,主孔径约为25 nm.锐钛矿型TiO2纳米管和偏钛酸纳米管均呈现出明显的紫外光催化降解对氯苯酚的活性,锐钛矿型TiO2纳米管的降解效率约为44%(1 h).离子液体的加入不仅可扩大水热合成的温度范围,且有助于提高偏钛酸纳米管的结晶度.Hydrogen titanate nanotubes with high crystallinity were prepared under the ionic liquid [ Bmim] OH-assisted hydrothermal conditions and then converted into anatase TiO2 nanotubes by calcination at 470 ℃ for 2 h. The phases, morphologies and specific surface areas of the resulting samples were investigated by means of powder X-ray diffraction（XRD）, transmission electron microscopy（TEM）, Raman spectroscopy and Brunauer-Emmett-Teller（ BET） surface area analysis. The results indicated that the specific surface area and the pore size of anatase TiO2 nanotubes were ca. 355 m2/g and 25 nm, respectively. Both anatase TiO2 nanotubes and hydrogen titanate nanotubes exhibited high UV-light-driven photocatalytic degradation activity of parachlorophenol. The photodegradation efficiency of parachlorophenol reached 44% by anatase TiO2 nano-tubes, in 1 h of reaction. The introduction of ionic liquid could not only enlarge the temperature range of hy-drothermal synthesis, but also benefit for improving the crystallinity of hydrogen titanate nanotubes.

关 键 词：锐钛矿 TiO2 纳米管 离子液体 水热合成 

分 类 号：O611.4[理学—无机化学]