title: Sonophotocatalysis of oxalic acid solution.
abstract: Sonophotocatalysis of oxalic acid was performed in various atmospheric conditions. Sonophotocatalysis means a coupled reaction of sonolysis and photocatalysis. CO(2), CO and H(2) were obtained. The yield of CO(2) was twice larger than the sum of yields of photocatalysis and sonolysis in an Ar atmosphere. Namely, synergistic effect was observed. Further improvement was observed after pre-sonication. Hydrogen peroxide produced during sonication is a key material for the synergistic effect. In surroundings including O(2), however, synergistic effect could not be observed. The role of ultrasonic waves on the sonophotocatalysis of organic compounds was investigated.
authors.affiliation: Meisei University, Department of Chemistry, 2-1-1, Hodokubo, Hino-shi, Tokyo 191-8506, Japan. harada@chem.meisei-u.ac.jp <harada@chem.meisei-u.ac.jp>
authors.forename: Hisashi
authors.initials: H
authors.lastname: Harada
authors.forename: Hisashi
authors.initials: H
authors.lastname: Tanaka