This study investigated the effects of annealing temperature on the structure evolution and antifungal performance of TiO2/Fe3O4 nanocomposites. The TiO2/Fe3O4 nanocomposites were fabricated through a combination of sonochemical and coprecipitation routes. The TiO2 structure evolved from an amorphous phase to a crystalline anatase phase starting at an annealing temperature of [Formula: see text]C while Fe3O4 evolved to [Formula: see text]-Fe2O3 and [Formula: see text]-Fe2O3 starting at an annealing temperature of [Formula: see text]C. The increases in the crystallite sizes and lattice parameters were also identified because of the increase in the annealing temperature. The TiO2/Fe3O4 nanocomposites tended to agglomerate due to van der Waals forces. The molecular structural dynamics of TiO2/Fe3O4 nanocomposites were also studied by infrared spectroscopy within the wavenumber range of 400–4000[Formula: see text]cm[Formula: see text]. The antifungal activity of TiO2/Fe3O4 nanocomposites was better than those of individual TiO2 and Fe3O4. These results showed that structure evolution plays an essential role in the antifungal performance of TiO2/Fe3O4 nanocomposites.

中文翻译：

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退火温度对天然砂制备的 TiO2/Fe3O4 纳米复合材料结构演变和抗真菌性能的影响

本研究考察了退火温度对 TiO2 结构演变和抗真菌性能的影响。2/铁3○4纳米复合材料。二氧化钛2/铁3○4纳米复合材料是通过结合声化学和共沉淀途径制造的。二氧化钛2结构从无定形相演变为结晶锐钛矿相，退火温度为 [公式：见正文]C 而 Fe3○4演化为【公式：见正文】-Fe2○3和[公式：见正文]-Fe2○3从[公式：见正文]C的退火温度开始。由于退火温度的增加，还发现了微晶尺寸和晶格参数的增加。二氧化钛2/铁3○4由于范德华力，纳米复合材料倾向于聚集。二氧化钛的分子结构动力学2/铁3○4纳米复合材料还通过红外光谱在400-4000波数范围内进行了研究[公式：见正文]cm[公式：见正文]。二氧化钛的抗真菌活性2/铁3○4纳米复合材料优于单个 TiO2和铁3○4. 这些结果表明，结构演化在 TiO 的抗真菌性能中起着至关重要的作用。2/铁3○4纳米复合材料。