Effect of Surface Site Defects on Photocatalytic Properties of BiVO₄/TiO₂ Heterojunction for Enhanced Methylene Blue Degradation

Table 2

Specific surface area (S_BET), pore volume, average pore diameter, and onset hysteresis loops (P/P°) of catalysts determined from N₂ chemisorption at 77 K using the BET equation.

Catalysts	SBET (m^2g^−1)	Pore volume (cm^3g^−1)	Pore size (Å)	Onset of hysteresis loops (P/P°)
BiVO4	7	0.05	363	0.80
10 wt% BiVO4/TiO2	94	0.56	188	0.75
5 wt% BiVO4/TiO2	69	0.59	274	0.79
2 wt% BiVO4/TiO2	74	0.59	265	0.78
TiO2	67	0.31	169	0.73