Facile tailoring of titanate nanostructures at low alkaline concentration by a solvothermal route
- 351 Downloads
Nanostructured titanates with different morphologies such as nanoflakes, nanotubes, and nanofibers have been selectively synthesized by a simple solvothermal treatment of commercial anatase TiO2 using the mixed water–ethanol cosolvent at low alkaline concentration. The effects of solvothermal temperature, volume ratio of H2O to C2H5OH, amount of NaOH and solvents on the formation of titanate nanostructures have been systematically studied through X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). At low concentration of NaOH solution (the actual concentration of OH− in the solution is only 0.58 M), different titanate nanostructures are achieved by simply changing the volume ratio of H2O to C2H5OH at 180 °C and titanate nanotubes can be synthesized between 100 and 180 °C. A probable formation mechanism is proposed based on XRD, SEM and TEM analysis. The influence of cosolvent on the transformation from anatase TiO2 to titanate is also investigated.
KeywordsTiO2 Titanate Lamellar Structure Sodium Titanate Titanate Nanotubes
This work has been supported by National Basic Research Program of China (973 Program, 2010CB732306), National Nature Science Foundation of China (21007016 and 20977030), the Project of International Cooperation of the Ministry of Science and Technology of China (2011DFA50530), Science and Technology Commission of Shanghai Municipality (10520709900 and 10JC1403900) and the Fundamental Research Funds for the Central Universities.
- 1.Iijima S (1991) Nature 56:354Google Scholar
- 24.Bavykin DV, Kulak AN, Walsh FC (2008) Cryst Growth Des 20:3800Google Scholar
- 25.Huang JQ, Cao YG, Wang ML, Huang CG, Deng ZH, Tong H, Liu ZG (2010) J Phys Chem C 114:14748Google Scholar
- 26.Chen Q, Du GH, Zhang S, Peng LM (2002) Acta Crystallogr B58:587Google Scholar