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. It was due to partial
filled-in of the pores with the Ag nanoparticles in the samples.
The textural properties (BET surface area, total pore volume
and pore diameter) of TiO2 and Ag–TiO2 samples are shown in
Table 1. It indicates that BET surface area, total pore volume
and pore size of TiO2 samples were higher than those of Ag–
TiO2 samples. It demonstrated that the presence of Ag
nanoparticles within the pores lowered the textural properties
of the samples.
3.1.5. Textural propertiesFig. 5 shows the nitrogen adsorption–desorption isothermsof (a) TiO2 and (b) Ag–TiO2 particles. It displays type IVisotherm according to IUPAC classification, which indicatedmesoporous characteristic of the sample. The appearance oftype H-3 hysteresis loop indicated the formation ofasymmetric, interconnected, slit-like mesoporosity in thesamples [29]. It is to be noted that the uptake of nitrogenincreased steeply above the relative pressure of 0.7. Thecorresponding BJH pore size distributions derived fromdesorption data of the isotherms are shown in the insets ofFig. 5. For TiO2 samples, the pore size distributions werewider than those of Ag–TiO2 samples. It was due to partialfilled-in of the pores with the Ag nanoparticles in the samples.The textural properties (BET surface area, total pore volumeand pore diameter) of TiO2 and Ag–TiO2 samples are shown inTable 1. It indicates that BET surface area, total pore volumeand pore size of TiO2 samples were higher than those of Ag–TiO2 samples. It demonstrated that the presence of Agnanoparticles within the pores lowered the textural propertiesof the samples.
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