3.1.5. Textural properties
Fig. 5 shows the nitrogen adsorption–desorption isotherms
of (a) TiO2 and (b) Ag–TiO2 particles. It displays type IV
isotherm according to IUPAC classification, which indicated
mesoporous characteristic of the sample. The appearance of
type H-3 hysteresis loop indicated the formation of
asymmetric, interconnected, slit-like mesoporosity in the
samples [29]. It is to be noted that the uptake of nitrogen
increased steeply above the relative pressure of 0.7. The
corresponding BJH pore size distributions derived from
desorption data of the isotherms are shown in the insets of
Fig. 5. For TiO2 samples, the pore size distributions were
wider than those of Ag–TiO2 samples