MgBi-LDHs and NiBi-LDHs are prepared by co-precipitation,and the catalysts are characterized and analyzed by UV/VIS spectrophotometer,and the effects of initial pH,catalyst molar ratio and light type on the degradation effect of Rhodamine B(RhB)are explored;scanning electron microscopy(SEM)is used to analyze the morphology and elemental distribution of materials.The experimental results show that when the initial pH of the solution is 6,under the condition of xenon lamp irradiation for 4 hours,Mg-Bi(3:1)has the best degradation effect,and the removal rate is as high as 91.24%;under the condition of ultraviolet lamp irradiation for 4 hours,Mg-Bi(5:1)degradation effect is the best,and the removal rate can reach 92.16%.The preparation of this photocatalyst provides a cheap and simple measure for the degradation of Rhodamine B,which has certain guiding significance for the synthesis of other high-efficiency photocatalysts.
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