let me show you this and then i'll talk about the doping i want to do , hopefully within this process.. 

Abstract TiO2 nanoparticles were synthesized by a homogeneous controlled precipitation method using industrial
titanium sulfate (Ti(SO4)2). The obtained powders were characterized by X-ray diffraction (XRD), transmission electron
microscope (TEM), Fourier transform infrared spectroscopy (FTIR) and ICP plasma spectrometer. EDTA was used as
complexing agent to improve the purity and the formation of TiO2 nanoparticles. Experimental results indicated that the
high-purity TiO2 nanoparticles were 20 nm in mean size and nearly monodispersed.
Keywords synthesis, high purity, TiO2, nanoparticle
1. Introduction
TiO2 nanoparticles are extensively studied for their wide
use as a pigment or catalyst, in photovoltaic applications
and removal of heavy metal ions from solutions for detoxification
and oxidation of toxic organic contaminants in water
to carbon dioxide, etc. (Diebold, 2003; Xie et al., 2003).
TiO2 nanoparticles can be synthesized through a sol-gel
method, a hydrothermal method, and via hydrolysis of
inorganic salts (Yang et al., 2003; Shi et al., 2002; Gao &
Elder, 2000; Hamoudi et al., 2001; Sugimoto et al., 2002;
Wang et al., 2002; Xu et al., 1999; Chen et al., 2002; Ding
& Liu, 1997). The present paper describes a method of
preparing monodispersed high-purity TiO2 nanoparticles
through controlled precipitation from industrial titanium
sulfate.
2. Experimental
In a typical synthesis process, Ti(SO4)2 was dissolved in
deionized water to obtain a 0.05 mol⋅L−1 solution, to which
was added 0.01 mol⋅L−1 EDTA solution under continuous
stirring at room temperature. Then 0.1 mol⋅L−1 aqueous
NaOH solution was added to the above liquid till a white
precipitate appeared. The solution was heated to 80°C
slowly and kept at that temperature for 2 h. The precipitate
was centrifuged, washed with deionized water and then
dried. The powder obtained was calcined at 600°C for 2 h.
X-ray diffraction (XRD) was used to identify the crystal
phase of the powder using a Rigaku Dmax-2000 diffractometer
(40 kV, 100 mA, Cu Kα radiation). The particle size
and morphology were examined with a Hitachi-800
Transmission Electron Microscope (TEM). FTIR spectra
were recorded on a Hitachi 260-50 infrared spectrophotometer.
The impurity contents of the samples were determined
with an ICP plasma spectrometer.
3. Result and discussion
Figure 1 shows the X-ray diffraction patterns of samples
calcined at 400°C, 500°C and 600°C, with the peaks indexed
according to JCPDS (Cards No.21-1272 or
No.21-1276) for anatase and rutile TiO2 lattices, showing
that only anatase appeared for the 400°C and 500°C-calcined
powders, and a mixture of anatase and rutile for the
600°C-calcined powder. The sharp peaks indicate particle
growth with rising calcination temperature, accompanied
by grain growth. From the widths at the half-height of the
peaks, the average particles sizes were calculated from
Scherer equation: D = Kλ / (β cosθ ) , where D is the average
particles size, K is Scherer’s constant, K=0.89, λ is the
wavelength of the X-ray used, β is the half-peak width, and
θ is the Bragg angle. The calculated particle sizes averaged
between 15 and 20 nm. By using the matrix-flushing
method, the relative contents of anatase and rutile for the
TiO2 powder calcined at 600°C were found to be 92.5%
and 7.5% respectively.
Fig.