Abstract
Photocatalytic reactions of alkynes and alkenes with water have been investigated over TiO/sub 2/ powder. The major photoformed products are those formed by hydrogenation accompanied by double bond carbon or triple bond carbon fission. Oxidation products such as CO and CO/sub 2/ are also formed. From the change in the product yields with the remaining amount of water adsorbed as well as the pressure of water vapor it is concluded that water molecules and not surface OH/sup -/ groups are responsible for the reaction and also that vacant sites for the alkyne (or alkene) adsorption are necessary for the occurrence of the reaction. The fission of the double bond carbon or triple bond carbon observed with the hydrogenation is attributed to the interaction of the alkynes (or alkenes) with the trapped e/sup -/ (Ti/sup 3 +/) and h/sup +/ (OH) pairs. It is suggested that a close association of photoformed electron and hole pairs plays a significant role in the bond fission.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
