Abstract
Compared with the traditional adsorption filtration method or oxidation method of titanium dioxide and other materials, photocatalytic degradation of organic pollutants is used to generate extremely active free radicals in the reaction system, through combination or substitution of free radicals with organic pollutants. The process degrades pollutants into non-toxic and harmless inorganic substances. This method is widely used due to its environmental protection, energy saving, and easy operation. Among today's many catalysts, heteropoly acids stand out as a green catalyst with unique properties. It has a variety of types, changes in structure, magnetism, conductivity, redox activity and other advantages, showing good application prospects. Researchers have combined multiple materials to make their properties complementary to become more efficient catalysts. This article introduces the latest work of heteropolyacid photocatalysts for treatment of organic pollutants in wastewater, and summarizes the synthesis conditions and catalytic mechanism of several modified heteropolyacids in photocatalysts. Research progress in the field of photocatalysis is reviewed.
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