脉冲放电等离子体协同 TiO/WO 复合材料降解水中抗生素氯霉素：机制与降解途径。
Degradation of antibiotic chloramphenicol in water by pulsed discharge plasma combined with TiO/WO composites: mechanism and degradation pathway.
机构信息
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian University of Technology, Dalian 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), Dalian University of Technology, Dalian 116024, China; School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China; School of Electrical Engineering, Dalian University of Technology, Dalian 116024, China.
出版信息
J Hazard Mater. 2019 Jun 5;371:666-676. doi: 10.1016/j.jhazmat.2019.03.051. Epub 2019 Mar 12.
Pulsed discharge plasma (PDP) combined with TiO/WO composites for chloramphenicol (CAP) degradation was investigated. The prepared TiO/WO composites were characterized by scanning electron microscope, transmission electron microscope, nitrogen adsorption apparatus, zeta sizer, X-ray diffraction, Raman spectra, UV-Vis absorption spectroscopy, X-ray photoelectron spectroscopy, photocurrent and electrochemical impedance spectroscopy. The degradation performance showed that the addition of TiO/WO composites significantly enhanced the removal efficiency of CAP in PDP system. At a peak voltage of 18 kV, the highest removal efficiency of CAP could reach 88.1% in PDP system with 4 wt% TiO/WO, which was 36.8% and 26.0% higher than that in sole PDP system and PDP/TiO system, respectively. The TiO/WO composites significantly accelerated interfacial charge transfer process compared to the pure TiO. Besides, the effect of catalyst dosage and peak voltage on CAP removal was evaluated. OH, OO, h and high-energy electrons contributed to CAP degradation in PDP-TiO/WO system. Addition of TiO/WO composites can decompose O and produce more OH and HO. The degradation intermediates were measured by liquid chromatography-mass spectrometry (LC-MS) and ion chromatography (IC). The cycling degradation experiment showed that the TiO/WO composites have good reusability as well as stability.
脉冲放电等离子体（PDP）与 TiO/WO 复合材料联合用于氯霉素（CAP）降解的研究。通过扫描电子显微镜、透射电子显微镜、氮吸附仪、纳米粒度仪、X 射线衍射、拉曼光谱、紫外-可见吸收光谱、X 射线光电子能谱、光电流和电化学阻抗谱对制备的 TiO/WO 复合材料进行了表征。降解性能表明，TiO/WO 复合材料的添加显著提高了 PDP 体系中 CAP 的去除效率。在峰值电压为 18 kV 时，在 PDP 体系中添加 4 wt% TiO/WO 时，CAP 的去除效率最高可达 88.1%，分别比单独的 PDP 体系和 PDP/TiO 体系高 36.8%和 26.0%。与纯 TiO 相比，TiO/WO 复合材料显著加速了界面电荷转移过程。此外，还评估了催化剂用量和峰值电压对 CAP 去除的影响。OH、OO、h 和高能电子有助于 PDP-TiO/WO 体系中 CAP 的降解。添加 TiO/WO 复合材料可以分解 O 并产生更多的 OH 和 HO。通过液相色谱-质谱（LC-MS）和离子色谱（IC）测量了降解中间体。循环降解实验表明，TiO/WO 复合材料具有良好的可重复使用性和稳定性。
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