| 宋禹昕,梁海欧,白 杰,李春萍.化学通报,2024,87(4):482-489,463. |
| 易分离回收的BiOBr/TiO2/PAN催化剂的制备及光催化降解盐酸四环素研究 |
| Preparation of easily separated and recovered BiOBr/TiO2/PAN catalyst and photocatalytic degradation of tetracycline hydrochloride |
| 投稿时间：2023-12-02 修订日期：2023-12-22 |
| DOI： |
| 中文关键词: 静电纺丝 光催化降解 柔性纳米纤维膜 BiOBr/TiO2/PAN |
| 英文关键词:electrostatic spinning,photocatalytic degradation,Flexible nanofiber membrane,BiOBr/TiO2/PAN |
| 基金项目:内蒙古自治区直属高校基本科研业务费项目(JY20220231,JY20220073)资助 |
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| 中文摘要: |
| 为了用BiOBr提高TiO2的光催化活性,人们做了大量的研究。然而,大多数工作合成的都是粉体结构,难以回收且易造成二次污染。本文通过静电纺丝技术结合溶剂热法制备了柔性的BiOBr/TiO2/PAN 纳米纤维膜,因其独特的自支撑膜结构,使问题得到解决。通过 SEM、TEM、XPS 、XRD和BET等对其结构和形貌进行表征,使用 UV-Vis DRS、EIS和i-t对其光电性能进行分析。结果表明,与单独的TiO2/PAN相比,在可见光照射下,BiOBr/TiO2/PAN 纳米纤维膜对盐酸四环素(TCH)降解的光催化活性增强,在140min内降解效率达到72.97%;5次循环实验中,催化剂的催化性能趋于稳定,循环后的XRD和SEM表明催化剂形貌和晶体结构没有发生改变,表现出优异的耐久性。 |
| 英文摘要: |
| A lot of research has been done to improve the photocatalytic activity of TiO2 with BiOBr. However, most of the work synthesized a powder structure, which has the problem of being difficult to recycle. In this paper, flexible BiOBr/TiO2/PAN nanofiber membranes were prepared by electrostatic spinning technique combined with solvothermal method, which makes them easy to be recycled due to their unique self-supporting membrane structure. The structure and morphology were characterized by SEM, TEM, XPS, XRD and BET, and the photoelectric properties were analyzed by UV-Vis DRS,EIS and i-t. The results showed that the photocatalytic activity of BiOBr/TiO2/PAN nanofiber membrane for the degradation of tetracycline hydrochloride (TCH) under visible light irradiation was enhanced compared with that of TiO2/PAN alone, and the degradation efficiency reached 72.97% within 140 min；The catalytic performance of the catalysts tended to be stabilized in the five cycling experiments, and the post-cycling XRD and SEM showed that the catalyst morphology and crystal structure did not change and exhibited excellent durability. |
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