Preparation of N-TiO₂ Using a Microwave/Sol-Gel Method and Its Photocatalytic Activity for Bisphenol A under Visible-Light and Sunlight Irradiation

Table 1

Characteristics of the prepared photocatalysts.

Photocatalysts	Crystalline phase		Absorbed wavelength (nm)	Band gap (eV)
	Anatase (%)	Rutile (%)
P	82.1	17.9	413	3.00
T	38.7	61.3	420	2.95
0.05 NT	33.2	66.8	429	2.89
0.1 NT	34.5	65.5	438	2.83
0.2 NT	41.9	58.1	445	2.79
0.5 NT	63.0	37.0	445	2.79
1.5 NT	73.6	26.4	445	2.79