Bi₂WO₆: Er, Yb nanofibers prepared via solvothermal-electrospinning method have high-efficiency photocatalysis performance and superior temperature feedback. Combining crystal integrity and polymer processability, polyacrylonitrile composite fibers are commendable in many aspects, such as large specific surface area, excellent flexibility, controllable structure and high solar energy utilization. The boost in photocatalysis activity can be attributable to non-radiative energy transfer between Er³⁺ ions with bismuth tungstate and doping effect of rare earth ions in Bi₂WO₆, where this doping enhances separation efficiency of electron-hole pairs and promotes generation of highly oxidative species. The electrospun nanofibers also can accurately perform contact-free temperature monitoring and real-time thermal feedback on the degradation system through ²H_11/2 → ⁴I_15/2 and ⁴S_3/2 → ⁴I_15/2 radiation transitions of Er³⁺ ions. In addition, the absolute sensitivity S_A and the relative sensitivity S_R are as high as 0.868% K⁻¹ and 1.548% K⁻¹ at 313 K, respectively, which indicates nanofibers have good thermal sensitivity. This dual-function nanofiber provides new application prospects for the development of innovative multifunctional semiconductor materials to cope with the ecological and energy crisis.

Bi ₂ WO ₆ : 溶剂热-静电纺丝法制备的Er、Yb纳米纤维具有高效的光催化性能和优异的温度反馈。聚丙烯腈复合纤维结合晶体完整性和聚合物可加工性，在比表面积大、柔韧性好、结构可控和太阳能利用率高等方面值得称道。光催化活性的提高可归因于 Er ³⁺离子与钨酸铋之间的非辐射能量转移以及稀土离子在 Bi ₂ WO _{6 中的}掺杂作用，这种掺杂提高了电子 - 空穴对的分离效率并促进了高氧化性物质的产生。电纺纳米纤维还可以通过Er 的² H _11/2  →  ⁴ I _15/2和⁴ S _3/2  →  ⁴ I _15/2辐射跃迁对降解系统进行准确的非接触式温度监测和实时热反馈³⁺离子。此外，绝对灵敏度S_阿和相对灵敏度S _{- [R}是高达0.868％K ^-1和1.548％K ^-1分别在 313 K，这表明纳米纤维具有良好的热灵敏度。这种双功能纳米纤维为开发创新的多功能半导体材料以应对生态和能源危机提供了新的应用前景。