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- W4212795110 abstract "2-Propanol is a typical volatile organic compound in air; the mechanistic studies of 2-propanol photodegradation on TiO2 are important for the development of efficient photocatalysts. Here, we report a systematic study of 2-propanol photodecomposition on rutile (R)-TiO2(110) using the temperature-programmed desorption method. Under 355 nm irradiation, the formation of acetone ((CH3)2CO) is clearly detected on reduced R-TiO2(110). The photoreactivity of molecular 2-propanol is much lower than that of 2-propoxy groups. As the surface temperature increases from 90 to 200 K, the yield of (CH3)2CO production is markedly enhanced by 7 times, which is most likely due to the shift of 2-propanol molecules into dissociated 2-propoxy groups at higher surface temperature. Furthermore, the additional steric hindrance from the two methyl groups of 2-propanol may also inhibit the formation of suitable structures for 2-propanol dissociation on R-TiO2(110) at high 2-propanol coverage, thus lowering the yield of (CH3)2CO formation. The results provide a fundamental insight into secondary alcohol photochemistry on TiO2." @default.
- W4212795110 created "2022-02-24" @default.
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- W4212795110 date "2022-02-16" @default.
- W4212795110 modified "2023-10-16" @default.
- W4212795110 title "Photochemistry of 2-Propanol on Rutile TiO2(110)" @default.
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- W4212795110 doi "https://doi.org/10.1021/acs.jpcc.1c09861" @default.
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