【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.更多还原

【Abstract】 Hydrogen titanate nanotubes with high crystallinity were prepared under the ionic liquid [Bmim]OH-assisted hydrothermal conditions and then converted into anatase TiO2nanotubes 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 TiO2nanotubes 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 TiO2nanotubes,in 1 h of reaction. The introduction of ionic liquid could not only enlarge the temperature range of hydrothermal synthesis,but also benefit for improving the crystallinity of hydrogen titanate nanotubes.更多还原