School of Chemistry and Materials Engineering, Huizhou University, Guangdong 516007, PR China.
College of Environmental Science and Engineering, Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
Ecotoxicol Environ Saf. 2019 Apr 30;171:587-593. doi: 10.1016/j.ecoenv.2018.12.099. Epub 2019 Jan 15.
An easily separated photocatalyst, magnetic multi-walled carbon nanotubes/cerium dioxide (MMWCNTs-CeO) nanocomposite, has been successfully prepared by hydrothermal synthesis and subsequent loading of magnetic nanoparticles. The synthesized nanocomposite was characterized by scanning electron microscope, transmission electron microscopy, X-ray photoelectron spectroscopy, powder X-ray diffraction, and vibrating sample magnetometer. The characterization results indicated the successful synthesis of MMWCNTs-CeO nanocomposite. Photocatalytic degradation experiments were conducted to evaluate photocatalytic properties of MMWCNTs-CeO by using methylene blue (MB) as a model pollutant. After a light irradiation of two hours, relatively high degradation efficiency (97.5%) of MB was achieved by using MMWCNTs-CeO nanocomposite as photocatalyst in the presence of HO. The incorporation of magnetic nanoparticles could not only facilitate the separation of photocatalyst from the solution after treatment, but also enhance the photocatalytic degradation efficiency. The results of this study suggested that the synthesized MMWCNTs-CeO nanocomposite showed an attractive prospect for application in the treatment of organic wastewater.
一种易于分离的光催化剂，磁性多壁碳纳米管/二氧化铈（MMWCNTs-CeO）纳米复合材料，通过水热合成和随后负载磁性纳米颗粒成功制备。通过扫描电子显微镜、透射电子显微镜、X 射线光电子能谱、粉末 X 射线衍射和振动样品磁强计对合成的纳米复合材料进行了表征。表征结果表明成功合成了 MMWCNTs-CeO 纳米复合材料。通过使用亚甲基蓝（MB）作为模型污染物，进行光催化降解实验来评估 MMWCNTs-CeO 的光催化性能。在光照两小时后，在 HO 的存在下，使用 MMWCNTs-CeO 纳米复合材料作为光催化剂，MB 的相对高降解效率（97.5%）。磁性纳米颗粒的掺入不仅可以促进处理后光催化剂从溶液中的分离，而且还可以提高光催化降解效率。本研究结果表明，所合成的 MMWCNTs-CeO 纳米复合材料在处理有机废水方面具有广阔的应用前景。
