Photocatalytic selective oxidation of the terminal methyl group of dodecane with molecular oxygen over atomically dispersed Ti in a mesoporous SiO2 matrix
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- Photocatalytic selective oxidation of the terminal methyl group of dodecane with molecular oxygen over atomically dispersed Ti in a mesoporous SiO2 matrix
- Kim, Jae Yul; Jang, Ji-Wook; Youn, Duck Hyun; Kim, Eun Sun; Choi, Sun Hee; Shin, Tae Joo; Lee, Jae Sung
- RAY-ABSORPTION-SPECTROSCOPY; N-HEXANE; QUANTITATIVE-ANALYSIS; LINEAR COMBINATION; HYDROGEN-PEROXIDE; AEROBIC OXIDATION; SIEVE CATALYSTS; BINARY OXIDES; ALKANES; XANES
- Issue Date
- ROYAL SOC CHEMISTRY
- GREEN CHEMISTRY, v.15, no.12, pp.3387 - 3395
- Extraordinarily high selectivity (80-93%) for the oxyfunctionalization of the terminal methyl group was discovered in the photocatalytic selective oxidation of dodecane with molecular oxygen in a continuous flow system under mild gas phase reaction conditions over mesoporous TiO2-SiO 2 mixed oxide photocatalysts. The oxygenated hydrocarbon products were mainly aldehydes with carboxylic acids and ketones as minor products. By dispersing most of the Ti atomically in a tetrahedral coordination in a SiO 2 matrix, the oxygenated products were stabilized by diluting contiguous Ti sites present on the surface of TiO2 particles. The preferential oxidation of the terminal methyl group was ascribed to the extensive C-C bond breaking by photogenerated holes prior to oxyfunctionalization.
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