CAJ | 학술논문

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.
재리자액체[ Bmim] OH보조적수열조건하합성료결정도교호적편태산납미관,경470℃단소2 h,가전변위예태광형TiO2납미관.대산물적물상、형모화비표면적등진행료표정.결과표명,예태광형TiO2납미관적비표면적약위355 m2/g,주공경약위25 nm.예태광형TiO2납미관화편태산납미관균정현출명현적자외광최화강해대록분분적활성,예태광형TiO2납미관적강해효솔약위44%(1 h).리자액체적가입불부가확대수열합성적온도범위,차유조우제고편태산납미관적결정도.
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.