Preparation And Properties Of Magnetic Diatomite Based Composites

In this paper,magnetic diatomite based composites were prepared by hydrothermal method and electrostatic self-loading method,and the enhancement effect of adding Fe3O4 and diatomite on photocatalytic materials was discussed.（1）In order to control the morphology of Ag3PO4 and inhibit its photocatalysis properties,Ag3PO4/Fe3O4/Diatomite composites was prepared,and the application of dye degradation,adsorption and sterilization was discussed.After Fe3O4 and diatomite added,the photocatalytic effect of Ag3PO4 was greatly improved and had great application in adsorption.When Ag3PO4/Fe3O4/Diatomite composites was added,all the Escherichia coli as experimental subjects were inactivated.In addition,due to the magnetic properties of Fe3O4,Ag3PO4/Fe3O4/Diatomite composites is easy to recover in the external magnetic field and the degradation effect of the composite remains high after three cycles,which is due to the strong electron transfer characteristics of Fe3O4,which enhances the photocatalytic performance of Ag3PO4.（2）The g-C₃N₄/diatomite/Fe₃O₄ composites were synthesized by an electrostatic self-assembly method.The band edge of g-C₃N₄ was red shifted due to the addition of Fe₃O₄ and diatomite.Consequently,the visible light response of the composites was intensified.The results also showed that the photocatalytic performance of the g-C₃N₄/diatomite/Fe₃O₄ composites was improved versus pure g-C₃N₄.H₂O₂ was also added to the reaction system.In this way,the synergistic effect of photocatalysis and the Fenton effect can largely improve the catalytic efficiency of the g-C₃N₄/diatomite/Fe₃O₄ composites.The composites are extremely easy to be collected in the presence of an external magnetic field,proving the good recyclability of the g-C₃N₄/diatomite/Fe₃O₄ composites.（3）The results of the UV-vis analysis imply that the Fe₃O₄ and diatomite are beneficial to efficiency.The WO₃/Fe₃O₄/Diatomite composites can be recycled by a magnet,indicating that the composites possess magnetic and recyclable.It can be concluded from the photocatalytic experiment that the WO₃/Fe₃O₄/Diatomite composites have a good photocatalytic effect in both acidic and alkaline conditions for RHB-MO-MB mixture day.Figure[46]table[8]reference[141]...