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

Table 1

Crystallite diameter, pore size, surface area, and band gap E_g of TiO₂^m samples prepared in an autoclave at 200°C and at 530°C.

HCl% (v/v)	Crystallite size (nm)	Pore size (nm)	Surface area (m^2/g)	Crystallite size (nm)	Pore size (nm)	Surface area (m^2/g)	Eg (eV)
200°C				530°C
0.5	8.45	2.96	161.10	22.20	10.72	31.75	3.18
1.0	9.93	4.21	196.00	19.90	12.35	47.30	3.23
1.5	11.54	15.12	183.90	17.60	41.11	65.56	3.27
2.0	11.50	6.57	208.70	20.00	23.56	55.46	3.31
2.5	11.75	5.96	208.10	19.30	19.75	56.83	3.25
3.0	12.05	6.43	198.50	18.40	16.83	60.12	3.32