Preparation method of titanium dioxide/molybdenum trioxide heterojunction and application of titanium dioxide/molybdenum trioxide heterojunction in photocatalytic desulfurization

Abstract

The invention belongs to the technical field of composite catalyst preparation, and relates to photocatalyst desulfurization, in particular to a preparation method of titanium dioxide / molybdenum trioxide heterojunction. The preparation method comprises the following steps: dispersing molybdic acid in deionized water, carrying out uniform mixing, dropwise adding tetrabutyl titanate, fully and uniformly stirring the formed mixture, transferring the mixed solution to a crucible, placing the crucible in a programmed-heating muffle furnace, conducting roasting for 3-8 h at a temperature of 300-900 DEG C, performing cooling to room temperature, and then conducting grinding so as to obtain the titanium dioxide / molybdenum trioxide heterojunction, wherein a solid-to-liquid ratio of tetrabutyl titanate to molybdic acid to deionized water is 3-15 mL: 0.16-0.19 g: 50-100 mL. The invention also discloses application of the titanium dioxide / molybdenum trioxide heterojunction to photocatalytic oxidation fuel oil desulfurization. According to the invention, a synthesis process is simple to operate; the compounding of a photo-induced electron hole pair is reduced, and the service life of a photo-induced carrier is prolonged, so photocatalytic activity is improved; the operation conditions of reaction are mild; and the heterojunction catalyst has stable structure property, can be repeatedly recycled, and shows excellent industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of composite catalyst preparation, relates to photocatalyst desulfurization, in particular to a preparation method of titanium dioxide / molybdenum trioxide heterojunction and its application to photocatalytic desulfurization. [0002] technical background [0003] With the rapid development of industry, transportation has played an increasingly important role. Gasoline and diesel are the main fuels in the transportation industry, and people's demand for gasoline and diesel is also increasing; but gasoline and diesel contain a large amount of Sulfur-containing compounds, the sulfur oxides produced after combustion, cause a series of environmental problems, such as the formation of acid rain, which destroys farmland and vegetation, corrodes buildings and cultural relics, and pollutes rivers and lakes. At the same time, sulfur oxides can also poison automobile exhaust gas treatment catalysts, which in turn will p...

AI Technical Summary

Problems solved by technology

Titanium dioxide is the most widely used photocatalyst. Molybdenum trioxide is a cheap and easy-to-obtain photocatalyst, but they also have many disadvantages, such as large band gap, easy recombination of photogenerated electrons and photogenerated holes, and low photocatalytic efficiency.

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