Method for photocatalytic oxidation of hydrocarbons

Abstract

The invention provides a method for preparing an aldehyde compound through photocatalytic oxidation of hydrocarbon C-H bonds. The method comprises the step that with nitrogen-doped titanium dioxide (N-doped TiO2) as a catalyst and air or oxygen as an oxygen source, the corresponding aldehyde, ketone or acid compound can be generated through the oxidation of the C-H bonds after illumination. The method has the advantages that the conditions are mild, the oxidation efficiency is high, and the product yield is high; under the illumination condition, with the air or oxygen as the oxygen source, the method is economical and environmentally friendly, accords with sustainable energy strategies and has broad application prospects.

Description

technical field [0001] The invention relates to the field of photocatalytic conversion of organic compounds, in particular to a method for preparing aldehydes, ketones or acid compounds by photocatalytic oxidation and cracking of C-H bonds of hydrocarbon compounds. Background technique [0002] Oxidative cleavage of C–H bonds plays an important role in organic synthesis. However, the inherent non-polarity, thermodynamic stability, and kinetic inertness of the C-H bond make the cleavage of the C-H bond difficult and challenging. In non-catalytic processes, some metered oxidants are mostly used under high temperature and high pressure conditions. In the catalytic process, some transition metal complexes or oxides are mainly used as catalysts, and hydrogen peroxide or oxygen is used as the oxygen source. However, in these processes, it is generally necessary to add complex ligands or alkali and other additives. Only then can it be realized. Because these conditions are relat...

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Problems solved by technology

Due to these harsh conditions, the selectivity of the product is difficult to control, which often leads to the formation of some over-oxidized products.

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