Photocatalytic formation of H-2 and value-added chemicals in aqueous glucose (Pt)-TiO2 suspension

摘要

Commercial and home prepared bare and Pt-supported TiO2 samples were used as the photocatalysts for the aqueous photo-conversion of glucose at ambient pressure and temperature. Aerobic and anaerobic conditions were used to study the products of glucose degradation both in the liquid (arabinose, erythrose, gluconic acid, glucaric acid, fructose and formic acid) and gaseous (H-2 and CO2) phases. The distribution of these molecules was different in the presence of the various powders, depending on the structural and physicochemical properties of the materials, and Pt resulted essential for the anaerobic production of H-2. The home prepared samples resulted more active than the commercial ones. The ruffle and brookite polymorphs were the most active samples both for glucose conversion and H-2 formation (about 1700 mu mol of H-2 were produced over 7 h of irradiation in the presence of Pt-brookite materials). Copyright (C) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.