A kind of composite photocatalyst and preparation method thereof

Abstract

The invention discloses a composite photocatalyst, which refers to a composite photocatalyst of bismuth molybdate and cadmium sulfide. The composite photocatalyst can enable water to continuously generate hydrogen under visible light irradiation of sunlight, and its preparation method is disclosed. The bismuth molybdate and cadmium sulfide composite photocatalyst prepared by the present invention has a large-area contact interface, which is conducive to carrier separation. The structure of the bismuth molybdate and cadmium sulfide is stable and the band gap is matched, which improves the photocatalytic activity and stabilizes the catalytic effect. It has excellent properties of photolysis of water to produce hydrogen, photodegradation of organic pollutants, heavy metal ions and reduction of carbon dioxide; the synthesis method has common raw materials, simple preparation operation process, easy to realize process parameters, low cost, easy operation, high yield and long cycle life. , has broad application prospects and industrialization prospects in the fields of photolysis of water to produce hydrogen, photodegradation of organic pollutants, reduction of heavy metal ions and carbon dioxide.

Description

technical field [0001] The invention relates to a composite photocatalyst and a preparation method thereof, belonging to the technical field of nanometer material preparation, in particular to a composite nanometer material and a preparation method thereof. Background technique [0002] In recent years, the energy crisis has intensified, oil has become increasingly depleted, and oil prices have risen, resulting in slow global economic growth. Countries have implemented various policies to solve the energy crisis, and some countries have launched wars to seize crude oil, the Iranian Revolution, the Persian Gulf War, and Iraq All wars are for the control of oil, and the ultimate goal is to solve the energy crisis. In order to solve the energy crisis in the world, many new energy sources and new methods have also been developed, such as photolysis hydrogen production, wind power generation, tidal power generation, geothermal power generation, etc., but most of the methods have ...

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Problems solved by technology

In the prior art, some patents use ultraviolet light to decompose water and produce hydrogen. Hydrogen is indeed an ideal energy source. Under the action of a catalyst, water is decomposed to produce hydrogen and oxygen. After the hydrogen is burned, water is produced, without any pollution to the environment. Moreover, the energy generated is very considerable, and hydrogen can be used to replace traditional energy sources; there are also technical papers that disclose hydrogen production by using ultraviolet light to produce hydrogen, but the proportion of ultraviolet light in sunlight is only 2%, and the rest 98% are all wasted. Although sunlight is infinite, such a small proportion cannot be mass-produced.

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