The study mainly developed the preparation of cellulose/chitosan composite aerogels loaded with visible light catalyst β-FeOOH/Fe3O4,which was subsequently used as a phototropic Fenton-like system to improve the catalytic efficiency.The degradation effect of com-posite aerogels on methyl orange(MO)with different β-FeOOH/Fe3O4 mass ratios and different loadings was systematically investigated,and the phototropic Fenton-like degradation mechanism was elaborated.The results showed that in phototropic Fenton-like degradation,the deg-radation rate of MO increased with the increase of loadings.When the mass ratio of β-FeOOH/Fe3O4 was 2:1,the degradation ability at-tained the optimum state,with a degradation rate of 89.1％.The results of free radical trapping experiments showed that the main active sub-tances for photo-induced degradation of methyl orange could be attributed to hydroxyl radicals.
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