Structural and pH effects on the photo- oxidation of some polyalcohols and sugars by the suspensions of TiO2 particles

✍ Scribed by O. Enea

• Book ID: 103065541
• Publisher: Elsevier Science
• Year: 1986
• Tongue: English
• Weight: 293 KB
• Volume: 31
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(86)80098-6

✦ Synopsis

The anodic photocurrent produced under the irradiation (350 c 1 < 420 nm) of the suspensions containing TiOr particlesmethyl viologen-polyalcohol or sugar, was measured at various pH values. The dependences of the rates of the changes of photocurrent with time (Ai/At) and the maximum photocurrent values (i,) as functions of pH have shown: (a) the speciftc adsorption of the polyalcohol or sugar molecules occurs before their photo-oxidation, and (b) the participation of both hydroxilic groups and OH-ions in the mechanism of the hole consumption is simultaneous. The hole scavenging efficiency of several compounds having a different chain length and number of OH groups was examined in order to obtain more information on the conversion of biomass components into electricity and/or convenient fuels.