I think titanium propoxide is a good precursor to obtain TiO2 nanowires via electrospinning technique.

Dear Huang Wang

Regarding the question you asked, I should denote that the answer is strongly dependent to the later application you expect from the TiO2-rich nanofibers.

In a case the as-spun fibers are readily undergo further calcination for production of TiO2 nanowiers, PVP and PVA are the choices of interest. You must barre it in your mind that solvent/TiO2 ananoparticles/ polymer ( the step wise mixing procedure follows the consequence) is really important since electrospinning is a time consuming procedure and you require to avoid the precipitation of particles in solution. Thereof, The choice of water as the solvent has many benefits.

In a case you need to fabricate carbon fibers with the further process of carbonization, the choice of DMF/TiO2 nanoparticles/PAN or PVA as the high value sources of carbon has attracted many attentions. Just remeber in each case you need to sonicate your solvent-particle mixture at least for 3 h.

Thanks to both of you.

Jin Goo Lee can you please let me know that y u think that Ti perpoxide is better choice?

Aref Daneshfar , thanks for your response. can you tell me that y water is best as solvent? and you mean if water use as a solvent then sonication time is 3 h?

In general, sol-gel mechanism is commonly used to prepare the precursor of electrospinning technique for inorganic nanowires. Many studies have demonstrated that metal alkoxides including Titanium propoxide are good sources for homogeneous sol-gel solutions. Besides, it is possible to control hydrolysis reaction of the sol-gel precursor by addition of acetic acid (maybe related to estherification), which can help to manipulate the surface morphology of the TIO2 nanowires such as porosity. One of the most famous papers related to TiO2 nanowires using Titanium propoxide was reported by D. Li & Y. Xia.

Nano Lett., Vol. 3, No. 4, 2003

Source of TiO2 is much related to your final application of fabricated nanofibers.

Using titanium precursor, you will need a calcination step to obtain your TiO2 nanofibers. TTIP as mentioned by others, is a titanium precursor widely used to obtain pure TiO2 nanofibers. However, its hydrolysis in air and humidity happens so fast. So the solution preparation needs a little skill and expertise!

Using TiO2 nanopowders you'll need a ultrasonic step to disperse it in a polymer solution. There is no calcination step and the electrospinning process is easier. However, you don't have pure TiO2 nanofibers in your final product.

what is the reason you need to fabricate electrospun nanofiber? where you want to apply the electrospun nanofibers can help you to choose a correct TiO2 source.

Thanks to all. I want to use for environmental applications.but stability of the solution is also a problem