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A kind of cubic ZnFe_2O_4 with spinel structure was synthesized by an improved solution combustion method via a facile and environmentally friendly pathway and their photocatalytic activity under visible light radiation was investigated.The particle synthesized under the ignition temperature of 573 K has a pure phase.While a small amount impurities,α-Fe_2O_3 and ZnO.were formed in the sample during the combustion process at higher ignition temperature of 623 K.The synthesized ZnFe_2O_4 has a sponge-like porous structure and wide absorption in the visible-light region.The impuritiesα-Fe_2O_3 and ZnO formed in the sample probably enhance the reduction and oxidation ability and promote the separation of photo-generated electrons and holes.Comparing with ZnFe_2O_4 synthesized by the conventional solid state reaction,the ZnFe_2O_4 derived by solution combustion method showed the better photocatalytic activity under visible light radiation.
A kind of cubic ZnFe_2O_4 with spinel structure was synthesized by an improved solution combustion method via a facile and environmentally friendly pathway and their photocatalytic activity under visible light radiation was investigated. The particle synthesized under the ignition temperature of 573 K has a pure phase. Whh a small amount of impurities, α-Fe_2O_3 and ZnO.were formed in the sample during the combustion process at higher ignition temperature of 623 K. The synthesized ZnFe_2O_4 has a sponge-like porous structure and wide absorption in the visible-light region. -Fe 2 O 3 and ZnO formed in the sample probably enhance the reduction and oxidation ability and promote the separation of photo-generated electrons and holes. Comparing with ZnFe 2 O 4 synthesized by the conventional solid state reaction, the ZnFe 2 O 4 derived by solution combustion method showed the better photocatalytic activity under visible light radiation.