A kind of composite photocatalyst and preparation method thereof

Abstract

The invention discloses a composite photocatalyst and a preparation method thereof. The composite photocatalyst is a bismuth molybdate and cadmium sulfide composite photocatalyst and enables water to produce hydrogen continuously under irradiation of visible light of sunlight. The prepared bismuth molybdate and cadmium sulfide composite photocatalyst has a large-area contact interface and facilitates carrier separation, bismuth molybdate and cadmium sulfide are stable in structure and are in band gap matching, so that photocatalytic activity is improved, catalytic effect is stable, and excellent properties of photocatalytically splitting water into hydrogen, photodegrading organic pollutants and reducing heavy metal ions and carbon dioxide are obtained; the raw materials for the synthetic method are common, the preparation operating process is simple, technological parameters are easy to realize, the cost is low, the operation is simple, the yield is high, the service life cycle is long, and the composite photocatalyst and the preparation method thereof have broad application prospect and industrial prospect in the fields of photocatalytic splitting of water into hydrogen, photodegradation of organic pollutants, reduction of heavy metal ions and carbon dioxide and the like.

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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