Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China; College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China.
College of Biological and Environmental Engineering, Changsha University, Changsha 410022, China.
J Colloid Interface Sci. 2021 Sep;597:196-205. doi: 10.1016/j.jcis.2021.04.020. Epub 2021 Apr 8.
The electrospun graphene oxide/MIL-101(Fe)/poly(acrylonitrile-co-maleic acid) nanofibers (E-spun GO/MIL-101(Fe)/PANCMA NFs) were fabricated by a facile electrospinning method and used as integrated photocatalytic adsorbents (IPAs) to remove dye pollutant from water samples. Compared with E-spun GO/PANCMA and E-spun MIL-101(Fe)/PANCMA NFs, the fabricated E-spun GO/MIL-101(Fe)/PANCMA NFs exhibited higher adsorption ability and excellent photocatalytic activity towards a model pollutant Rhodamine B (RhB). Under the optimized conditions, the as-prepared IPAs achieved almost complete adsorption of RhB within 15 min with the maximum adsorption capacity of 10.46 mg/g. Under visible-light irradiation, 93.7% of RhB in 20 mL water sample was degraded within 20 min, and the degradation kinetics of RhB fitted well with the first-order kinetic model. In addition, LC-MS analysis of the RhB degradation products confirmed the degradation pathways, and the generated •OH radicals played important roles in the degradation process. Importantly, the E-spun GO/MIL-101(Fe)/PANCMA NFs exhibited good reusability and could be reused for consecutive 20 cycles, which make them promising candidate materials in the field of industrial applications and environmental remediation.
通过简便的静电纺丝方法制备了氧化石墨烯/ MIL-101(Fe)/聚（丙烯腈-co-马来酸）纳米纤维（E-spun GO/MIL-101(Fe)/PANCMA NFs），并将其用作集成光催化吸附剂（IPAs），以去除水样中的染料污染物。与 E-spun GO/PANCMA 和 E-spun MIL-101(Fe)/PANCMA NFs 相比，所制备的 E-spun GO/MIL-101(Fe)/PANCMA NFs 表现出更高的吸附能力和对模型污染物罗丹明 B（RhB）的优异光催化活性。在优化条件下，所制备的 IPA 在 15 分钟内几乎完全吸附 RhB，最大吸附容量为 10.46 mg/g。在可见光照射下，20 mL 水样中 93.7%的 RhB 在 20 分钟内被降解，RhB 的降解动力学符合一级动力学模型。此外，对 RhB 降解产物的 LC-MS 分析证实了降解途径，生成的 •OH 自由基在降解过程中发挥了重要作用。重要的是，E-spun GO/MIL-101(Fe)/PANCMA NFs 表现出良好的可重复使用性，可连续重复使用 20 次，这使它们成为工业应用和环境修复领域有前途的候选材料。
