Aflatoxin B₁ (AFB₁) is one of the most toxic mycotoxins, which has a serious effect on animals and human health and causes secondary pollution in the environment. Herein, the in-situ synthesis of ceria nanocrystals on sepiolite nanofibers successfully improved photocatalytic efficiency for the removal of AFB₁ in aqueous solution under visible light. The optimum removal efficiency of the CeO₂/sepiolite (Ce/Sep) composites was up to 93.3% within 3 h and was nearly 2.7 times higher than that of nano ceria. After a series of characterization, it was indicated that the significantly enhanced removal performance of Ce/Sep composites can be attributed to the large specific surface of sepiolite, leading to the homogeneous distribution of ceria and reducing their particle sizes to 5-20 nm, which increased the reaction active sites. Besides, sepiolite as an electron acceptor also inhibited the photogenerated electron-hole pairs recombine, while the interface effect and function group reaction between sepiolite and ceria extended absorption in the visible light region and effectively improved the separation efficiency of photogenerated electron-hole pairs, which produced more reactive oxygen species to destroy the structure of AFB₁. This work demonstrates that the Ce/Sep composites possess excellent photocatalytic activity and have great application prospects in the treatment of AFB₁ environmental pollution.

黄曲霉毒素B ₁ (AFB ₁ )是毒性最强的霉菌毒素之一，对动物和人体健康造成严重影响，并对环境造成二次污染。在此，在海泡石纳米纤维上原位合成二氧化铈纳米晶体成功地提高了在可见光下去除水溶液中AFB _{1的光催化效率。CeO 2} /海泡石(Ce/Sep)复合材料的最佳去除效率在3内达到93.3%。 h 是纳米二氧化铈的近 2.7 倍。经过一系列表征后，表明 Ce/Sep 复合材料的去除性能显着增强可归因于海泡石的大比表面积，导致二氧化铈的均匀分布并将其粒径减小至 5-20 nm， 这增加了反应活性位点。此外，海泡石作为电子受体也抑制了光生电子-空穴对的复合，而海泡石与二氧化铈之间的界面效应和官能团反应扩大了在可见光区的吸收，有效提高了光生电子-空穴对的分离效率，产生更多活性氧破坏AFB _1的结构. 该工作表明Ce/Sep复合材料具有优异的光催化活性，在处理AFB ₁环境污染方面具有广阔的应用前景。