Synthesis of Mesoporous TiO₂ Spheres via the Solvothermal Process and Its Application in the Development of DSSC

Table 2

Crystallite diameter, surface area, pore size, and forbidden energy band gap E_g of samples thermally treated in air at 530°C as a function of the H₂O concentration.

H2O% (v/v) (530°C)	Crystallite size (nm)	Surface area (m^2/g)	Pore size (nm)	Eg (eV)
1.9	19.30	56.83	19.75	3.18
2.4	18.40	56.29	17.19	3.23
2.9	18.10	62.52	33.14	3.27
3.4	16.60	68.15	30.89	3.31
3.9	16.90	71.40	22.93	3.25
4.9	17.10	66.84	22.17	3.32