The results of some photocatalytic tests by using the

An important parameter in view of possible industrial application of the proposed system is membrane lifetime which strictly depends on the type of material. On this aspect, in our previous work [39] we studied the resistance of the polypropylene membrane during benzene hydroxylation to phenol in a membrane contactor where the membrane is in contact with a solution of Vanadium/H2O2. In that work, the life of the polypropylene membrane was estimated 246 h. Indeed, a physical membrane modification was observed, which caused an increase of the CGP41251 character of the surface in contact with the oxidizing environment. Contact angle measurements confirmed sarcomeres membrane modification: the water contact angle, aqueous side, decreased after membrane use from 127° to 102°. This membrane modification was also confirmed by SEM analyses and measurements of Young’s modulus, which increased from 68.51 N mm−2 of the new membrane till to 92.22 N mm−2 for the used membrane thus evidencing elasticity loss of the membrane. The observed physical membrane modification was ascribed to the attack of the OH radical on the membrane surface aqueous side, with formation of propylene oxide as confirmed by GC–MS analyses.