Evaluation of the anatase/rutile phase composition influence on the photocatalytic performances of mesoporous TiO2 powders

Microwave gas sensing with a microstrip interDigital capacitor: Detection of NH3 with TiO2 nanoparticles

“…Moreover, titania P25 shows a type II isotherm characteristic of macroporous materials [30]. A H3-type hysteresis loop is observed at high relative pressure and can be related to the typical capillary condensation and evaporation processes that occur in the presence of large pores [30]. As reported, P25 sample is characterized by a wide pore size distribution with a maximum pore width of 97.5±0.5 nm [30].…”

“…These two species are induced by two acid sites of different strength. Moreover, titania P25 shows a type II isotherm characteristic of macroporous materials [30]. A H3-type hysteresis loop is observed at high relative pressure and can be related to the typical capillary condensation and evaporation processes that occur in the presence of large pores [30].…”

“…Ammonia is adsorbed on TiO2 as coordinated NH3 and NH4+ due to surface Lewis acidity [29]. These two species are induced by two acid sites of different strength whereas P25 sample is characterized by a wide pore size distribution with a maximum pore width of 97.5±0.5 nm [30]. Moreover, Titania P25 shows a type II isotherm characteristic of macroporous materials [30].…”

“…These two species are induced by two acid sites of different strength whereas P25 sample is characterized by a wide pore size distribution with a maximum pore width of 97.5±0.5 nm [30]. Moreover, Titania P25 shows a type II isotherm characteristic of macroporous materials [30]. This kind of isotherm (H3-type with hysteresis loop) can be related to the typical capillary condensation and evaporation processes that occur in the presence of large pores [30].…”

“…Moreover, Titania P25 shows a type II isotherm characteristic of macroporous materials [30]. This kind of isotherm (H3-type with hysteresis loop) can be related to the typical capillary condensation and evaporation processes that occur in the presence of large pores [30]. Hence, it is still difficult to correlate NH3 and NH4 + species and nano and macroporous structure upon dielectric properties.…”