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This article by hydrothermal method the synthesis the The anatase TiO 2 < / sub > nano - crystals , the large scale micron level SnO 2 crystals and Sn -doped TiO < / sub> nano-materials . TiCl3 as precursor , 180 ℃ thermostat to maintain 24h, synthesis of pure rutile phase nano TiO 2 crystals . NaCl was added as a mineralizing agent , the reaction product is pure rutile . Add KF mineralizer concentration greater than 0.2mol / L , and the resultant into pure anatase nano- TiO 2 . TiCl3 as precursors in the precursor to add a certain amount of sodium titanate nanotubes , the filling degree of 68 % , 150 ° C constant temperature maintenance 24h , the product was anatase of TiO 2 nanocrystals crystal morphology is massive , when sintered at 400 ℃ titanate nanotubes are added , Synthesis coryneform anatase crystal , the crystal diameter of about 10nm and a length of 30 -100nm , the maximum aspect ratio of approximately 5:1 . SnCl4 · 5H2O and ZnO precursor , KOH as a mineralizing agent first warmed to 180 ° C , reacted for 12 hours , synthesis ZnSnO3 , then raise the temperature to 430 ° C , reacted for 24 hours , using the solute ZnSnO3 decomposition at high temperatures conditions, to achieve the re-growth of the crystal , synthetic a the micron level SnO 2 rod-shaped crystals, the diameter of the crystals up to 150- 200nm and a length of 3-5μm . Use of TiCl3 SnCl4 · 5H2O mixed hydrothermal reaction , the synthesis of Sn-doped rutile TiO 2 nano - crystals , which Ti3 Sn4 ion ratio of 1:1 , the resulting crystal length 80 -200nm. Based on the measurement of X-ray fluorescence spectroscopy (EDS) , found that the low resultant Sn ingredients doping concentration only 2.81at % description of Sn in TiO 2 crystal solid solubility is low .
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