A recyclable and stable BiOI/agarose hybrid gel photocatalyst for photodegradation of Rhodamine B
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A novel hydrogel-based photocatalyst was prepared by synthesizing dispersively the BiOI microspheres in the agarose hydrogel (AG) matrix. The results from X-ray diffraction and Fourier-transform infrared spectroscopy analyses demonstrated that the BiOI and AG co-exist in the prepared BiOI/AG sample. The scanning electron microscopic observation revealed that the size of BiOI microspheres is about 2 µm. The BiOI/AG composite photocatalyst showed an enhanced photocatalytic property in degrading Rhodamine B under simulated solar light irradiation compared to the TiO2/AG. The stability and recyclability tests confirmed that the BiOI/AG composite photocatalyst is stable during the photodegradation reaction and can be easily separated from the solution and recycled for more than seven times.
This work was supported by the National Natural Science Foundation of China (Grant No. 51772183) and the Fundamental Research Funds for the Central Universities (Grant Nos. GK201602008 and GK201801005). We also thank the National Demonstration Center for Experimental X-physics Education (Shaanxi Normal University) for the support.
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