Can the size of TiO2 powder be becreased if it was dissolved in 2.5 M NaOH, then Precipetated by 1 M conc. HCL, according to the following equations:

TiO2 + 2NaOH = Na2TiO3 + H2O

Na2TiO3 + 2HCL = 2NaCL + TiO2 +H2O

??

and if it is not possible, what will be the best method to prepare TiO2 nanoparticles with size less than 50 nm ??

Thanks in advance.

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