Two heterogeneous photocatalysts have been prepared by entrapment of [nBu4N]4W10O32 into a silica matrix, through sol-gel procedure: SiO2/W30% and SiO2/W10% with 30 % and 10% of decatungstate, respectively. They are characterized by the presence of micropores of about 7 Å and 15 Å and mesopores of about 25 Å. Due to the different preparation procedure, SiO2/W10% presents more remarkable porous network than SiO2/W30%. The morphological features of SiO2/W30% and SiO2/W10% differ from those of their parent material SiO2/W0%, indicating that incorporation of the decatungstate induces a significant modification of the porous texture of the siliceous material. These photocatalysts present a good stability in the oxygen-assisted photooxidation of 1-pentanol and 3-pentanol, which have been chosen as models of primary and secondary aliphatic alcohols.
Matrix effects on the photocatalytic oxidation of alcohols by [nBu4N]4W10O32 incorporated into sol-gel silica
MOLINARI, Alessandra;BRATOVCIC, Amra;MALDOTTI, Andrea
2010
Abstract
Two heterogeneous photocatalysts have been prepared by entrapment of [nBu4N]4W10O32 into a silica matrix, through sol-gel procedure: SiO2/W30% and SiO2/W10% with 30 % and 10% of decatungstate, respectively. They are characterized by the presence of micropores of about 7 Å and 15 Å and mesopores of about 25 Å. Due to the different preparation procedure, SiO2/W10% presents more remarkable porous network than SiO2/W30%. The morphological features of SiO2/W30% and SiO2/W10% differ from those of their parent material SiO2/W0%, indicating that incorporation of the decatungstate induces a significant modification of the porous texture of the siliceous material. These photocatalysts present a good stability in the oxygen-assisted photooxidation of 1-pentanol and 3-pentanol, which have been chosen as models of primary and secondary aliphatic alcohols.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
