Showing papers on "Photocatalysis published in 1977"
506 citations
495 citations
TL;DR: In this article, secondary and tertiary methylbutanols are photo-oxidized on nonporous TiO2 via an olefin, which is formed by dehydration, to give an aldehyde or a ketone.
45 citations
TL;DR: In this article, the suitability of a method to analyze the reduction process of the photocatalytic reaction was discussed, and it was concluded that a high utilization of light energy could not be expected for photocATalytic reactions because both bands of the semiconductor participated in the reaction.
Abstract: Photocatalytic reductions of MnO4−, Cr2O72−, and Fe3+ on illuminated rutile were demonstrated. The suitability of a method to analyze the reduction process of the photocatalytic reaction was discussed. It was concluded that a high utilization of light energy could not be expected for photocatalytic reactions because both bands of the semiconductor participated in the reaction. In such a case, the development of the photocatalvtic process into a photoelectrochemical cell has a great advantage from the point of view of energy utilization.
31 citations
TL;DR: In this paper, the photocatalytic reactions of quinones dissolved in methanol were investigated on an illuminated n-type semiconducting rutile catalyst by employing electrochemical measurements based on the local cell process.
11 citations
2 citations
2 citations
01 Sep 1977
TL;DR: Isobutane was photooxidized on titanium dioxide between -16 and +180 C in tertiary butanol and acetone as mentioned in this paper, and the reaction kinetics obeyed a steady state model of oxygen chemisorption with the involvement of isobutane in the physisorbed phase.
Abstract: Isobutane was photooxidized on titanium dioxide between -16 and +180 C in tertiary butanol and acetone. The formation of tertiary butanol preceded the formation of acetone. Above 20 C the latter compound became clearly predominant. The reaction kinetics obeyed a steady state model of oxygen chemisorption with the involvement of isobutane in the physisorbed phase.
1 citations
01 Sep 1977
TL;DR: The photocatalytic oxidation of isobutane to acetone in the presence of irradiated ultraviolet irradiated titanium dioxide was found to occur in several steps as mentioned in this paper, which implied the photonic formation of the 02- species and its reaction with positive holes.
Abstract: The photocatalytic oxidation of isobutane to acetone in the presence of irradiated ultraviolet irradiated titanium dioxide was found to occur in several steps. Insertion of an oxygen atom onto the tertiary carbon transforming the isobutane into tertiary butanol occurred first. This step implied the photonic formation of the 02- species and its reaction with positive holes. The tertiary butanol was then dehydrated to isobutene which is oxidized acetone and carbon dioxide. Insertion of an oxygen atom onto the primary carbon led to isobutanal after oxidation to the alcohol. An analogous reaction scheme was proposed for all alkanes.
1 citations
1 citations