From the following article:

"Control of Nucleation in Solution Growth of Anatase TiO2 on Glass Substrate" by Hua Gui Yang and Hua Chun Zeng J. Phys. Chem. B 2003, 107, 12244-12255

"Hydrochloric acid (HCl, 1.5 M) and aqueous ammonia (NH3.H2O, 1.5 M)

were used to adjust the pH of deionized water (1.0 L) to 2.1.

TiF4 (Aldrich Chemical) was then dissolved in this solution to

give a concentration of 0.04 M, during which the pH was

reduced to 1.8."

I expect the pH control, described above, is necessary to control the rate of hydrolysis of TiF4 to TiOx and HF.

thank you mohanal sehgal and Ian A Cade for the idea and solution..theoretically, DI water must be add with HCl and ammonia to adjust the pH value before dissolve TiF4..

... one last thing, as Manohar mentioned, TiF4 is fairly toxic as it liberates HF when it reacts with water.

So, before starting anything, make sure you are familiar with the very negative heath effects of HF and have a calcium-based antidote nearby (a tube of calcium gluconate is traditional).

TiF4 hydrolyses rapidly in water to give an ill defined and insoluble titanium(IV) hydroxide-oxide (like aqueous "Fe(OH)3"). Ti(IV) aquo ions do not exist. In the presence of HCl Ti(IV) forms aquo-chloro-hydroxo complexes, a mixture depending on the chloride concentration and pH. I do not know how efficient fluoride ions compete with chloride and hydroxyde as ligands at Ti(IV) but I could look it up.

TiF4 is not soluble in water. It is very hygroscopic and on hydrolysis gives TiO2, HF, TiOF2 and also dihydrate products. It is volatile and can be sublimed. While TiCl4 is a liquid, TiF4 is solid since it is polymerized through fluorine bridges. This fluoride, however, is soluble in ethanol and pyridine to give TiF4.2EtOH and TiF4.2C5H5N respectively.

Ian A Cade...what is the purpose of calcium gluconate?calcium gluconate gel are use into our body/hand if accidently expose into the solution/gas directly?

based on your experience, how to prepare a solution of TiF4? i must add HCl to into DI water to adjust the pH value before put the TiF4 powder into the same beaker continue with stirring.does it work?

I have never worked with TiF4 (I have used TiCl4), but in my general experience of related compounds I would have to agree with Wolfgang Klaui and Mohammad Kooti above when they say that TiF4 rapidly hydrolyses in water to give a range of TiOxOHyXz type compounds.

As for the calcium gluconate gel I mentioned. It is just there to react with the HF before the HF reacts with your body (though if it isn't available you could probably use any convenient source of Ca2+).

Why the special safety measuires? Well HF is quite dangerous, much more so than the superficially similar HCl. A significant feature of HF is it is very mobile in the body, it will diffuse through your skin very quickly. Once in your body it will react with any calcium it finds to form insoluble CaF2. This is not good for two broad reasons

(1) Your body uses calcium for a wide range of functions - keeping you propped up with bones, is an obvious one, but more importantly Ca2+ is also involved with signalling between nerves and muscles, including your heart.

(2) Having large (on the scale of cells) crystals of insoluble mineral forming throughout your body tends to damage the surrounding tissue (I suppose you might consider this to be like the damage associated with frostbite... but unlike ice crystals which can be removed by warming, CaF2 is very difficult, if not impossible  to remove)

I would suggest you read this msds data before starting any TiF4 work:

http://www.chem.purdue.edu/chemsafety/equip/hfmsds.pdf

TiF4 is relatively more stable in water than TiCl4. In water, the adduct TiF4.2H2O is formed and with time it may undergo hydrolysis to form TiO2. In general the hydrolysis of TiF4 is very slow.