Photochemistry catalyzed by copolymer-templated mesoporous SiO2: Decomposition of methanol and formic acid.

Photochemical reactions of methanol and formic acid on L64 copolymer-templated mesoporous SiO2 have been investigated by Fourier transform infrared spectroscopy. Although SiO2 has been generally recognized to be photochemically inert, the reaction pathways HCOOH(a), HCOO(a)/SiO2 --> CO(2(g)) and CH3OH(a), CH3O(a)/SiO2 --> CH2O(a) --> HCOO(a) --> CO(2(g)) are demonstrated. The photons used in this study are unable to promote the SiO2 valance band electrons to the conduction band.