New viewpoints of magnetic-field influence on photocatalysis via 2-propanol oxidation

Magnetic-field effect on heterogenous photocatalysis was investigated on Pt/TiO2 by photocatalytic oxidation of 2-propanol. Two-level factorial design of dissolved oxygen concentration (DO), temperature, and magnetic flux density was applied for the first time. The high magnetic flux density with high DO significantly enhanced 22% 2propanol oxidation. The singlet-triplet intersystem crossing of radicals, as well as the Lorentz force suppressing the recombination of photogenerated electrons and holes, enabled such an extraordinary magnetic effect. Moreover, paramagnetic oxygen and platinum on TiO2 reinforced the intersystem crossing, which contributed to the significant improvement of photocatalytic oxidation of 2-propanol under magnetic field.

Automated summary

The effect of magnetic field on heterogenous photocatalysis of Pt/TiO2 for the oxidation of 2-propanol was investigated. A two-level factorial design was applied to examine the impact of dissolved oxygen concentration, temperature, and magnetic flux density. It was found that high magnetic flux density along with high dissolved oxygen concentration significantly enhanced the oxidation of 2-propanol by 22%. The extraordinary magnetic effect was attributed to the singlet-triplet intersystem crossing of radicals and the Lorentz force suppressing the recombination of photogenerated electrons and holes. The presence of paramagnetic oxygen and platinum on TiO2 further reinforced the intersystem crossing, leading to a significant improvement in the photocatalytic oxidation of 2-propanol under a magnetic field.