Method for photocatalytic oxidation of alkane by iron oxide

Abstract

The invention relates to a method for photocatalytic oxidation of alkane by iron oxide. The method employs iron oxide and N-hydroxyphthalimide or a derivative thereof to compose a photocatalytic system, and uses air or oxygen as the oxidant to realize selective oxidation of different hydrocarbons under the conditions of 400-650nm visible light irradiation at room temperature, thus generating an oxygen-containing chemical product. The specific steps include: dissolving a substrate hydrocarbon and N-hydroxyphthalimide or a derivative thereof in a solvent, adding an iron oxide catalyst, then replacing the atmosphere in a photoreactor with air or oxygen, and carrying out reaction at 20-35DEG C under 400-650nm visible light irradiation for 10-600min so as to generate corresponding aldehyde, ketone or organic acid. The synthesis method provided by the invention has important application in mild oxidation of hydrocarbons.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a method for iron oxide photocatalytic alkane oxidation. Background technique [0002] Fossil resources such as petroleum and natural gas are the most fundamental material basis of modern civilization. The main components of these fossil resources are various hydrocarbon compounds, so they are also called hydrocarbon resources. The petrochemical industry based on them has created many products for today's society, ensuring the supply of energy and raw materials; the rich and colorful functional chemicals that human modern life depends on, such as plastics, oils, paints, dyes, medicines , Pesticides, etc., most of them are produced step by step from hydrocarbons using chemical methods (Fokin, A.A.; Schreiner, P.R., Chem. Rev. 2002, 102, 1551-1593). The selective oxidation of hydrocarbons to prepare oxygenated chemicals is one of the important methods, and t...

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Problems solved by technology

However, there are few reports on the oxidation of hydrocarbons. In previous reports, because the surface of pure-phase oxides lacks the center that can directly convert hydrocarbons into carbon radicals, most oxides need to convert oxygen into active carbon radicals under light conditions first. Oxygen species, followed by oxidation of hydrocarbon molecules

In this process, the broad energy band structure and fast electron-hole recombination process make most metal oxides less active in oxidizing hydrocarbons.

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