BiOI decorated electrospun SrTiO₃ nanofibers (BE) with a spiky club structure were fabricated using a rapid microwave-assisted solvothermal method. The exposed (102) plane of BiOI preferentially coupled with the electrospun SrTiO₃ fibers aiming to achieve charge neutrality. XRD analysis demonstrated that a BE composite coupled with an optimal content of BiOI exhibited few crystal imperfections. The resulting BE samples showed a higher degradation efficiency towards methyl orange dye under visible light irradiation (λ > 400 nm) compared to the individual BiOI and SrTiO₃. The BE composite possessed a high degradation rate of 0.015 (k_app, min^–1) and a normalized rate constant of 2.46 × 10^–3 (k_app/surface area), which was 7.7 and 1120 times higher than those of BiOI and SrTiO₃ alone, and a degradation level over 94.6% within 3 h of irradiation under visible light. The high photocatalytic activity could be attributed to the heterostructure formation, p-n junction at the BE interface, high contact between water and dye molecules with the BiOI covered surface, and extended visible light absorption. This work provides an effective approach to produce BE nanofibers for dealing with methyl orange dye and proves that BE composites have the potential to serve as visible-light-driven photocatalysts.

采用快速微波辅助溶剂热法制备了具有尖头棍状结构的BiOI装饰的电纺SrTiO ₃纳米纤维（BE）。BiOI的暴露（102）平面优先与电纺SrTiO ₃纤维耦合，旨在实现电荷中性。XRD分析表明，BE复合材料与最佳含量的BiOI结合时，几乎没有晶体缺陷。 与单独的BiOI和SrTiO ₃相比，所得的BE样品在可见光照射下（λ > 400 nm）对甲基橙染料具有更高的降解效率。BE复合材料具有0.015（k _app，min ^–1的高降解率），归一化速率常数为2.46×10 ^–3（k _app /表面积），比单独的BiOI和SrTiO _3分别高7.7和1120倍，在可见光下照射3小时内降解水平超过94.6％。光。高的光催化活性可以归因于异质结构的形成，BE界面处的pn结，水和染料分子与BiOI覆盖的表面之间的高度接触以及扩展的可见光吸收。这项工作提供了一种生产用于处理甲基橙染料的BE纳米纤维的有效方法，并证明了BE复合材料具有用作可见光驱动的光催化剂的潜力。