SiC-Ti3C2/TiO2复合材料的构筑及声-光耦合催化性能
Construction of SiC-Ti3C2/TiO2 composites and its sono-photocatalytic performance
以碳化钛(Ti3C2)和碳化硅(SiC)为原料,通过一步水热法合成了SiC-Ti3C2/TiO2三元复合材料。采用X射线衍射仪、扫描电子显微镜、X射线光电子能谱仪等对样品的晶相、形貌和组成进行了表征分析。探讨了SiC掺杂量对复合材料声-光耦合催化降解四环素的性能影响。其中,SiC的掺杂量为7.5%的三元复合材料表现出最好的声-光耦合催化性能。对比3次循环催化实验中四环素的降解效率和循环前后样品的X射线衍射图,可以发现三元复合样品具有较好的声-光催化稳定性。活性物种捕获实验表明,·OH在声-光催化降解四环素过程中起最主要的作用。(光)电化学测试证实,与Ti3C2/TiO2材料相比,SiC-Ti3C2/TiO2复合材料具有更高的光电流值、较小的界面电荷转移电阻和Tafel斜率以及更优异的本征活性。
SiC-Ti3C2/TiO2 ternary composites were synthesized by in-situ hydrothermal process using titanium carbide (Ti3C2) and silicon carbide (SiC) as raw materials.The obtained samples were characterized by X-ray diffraction,scanning electron microscopy,and X-ray photoelectron spectroscopy for the analysis of their crystal phase,morphology,and composition.The effect of SiC doping amount on the sono-photocatalytic degradation of tetracycline was investigated.Thereinto,the ternary composites with 7.5% SiC exhibit the optimized sono-photocatalytic performance.By comparing the tetracycline-degradation efficiency in three-cycle catalytic experiment and the X-ray diffraction patterns of catalysts before and after three recycles,it can be found that the ternary composites exhibit excellent sono-photocatalytic stability.Active species trapping experiments confirm that ·OH plays major roles in the sono-photocatalytic degradation of tetracycline.(Photo)electrochemical tests demonstrate that,in comparison with Ti3C2 /TiO2,SiC-Ti3C2/TiO2 composites show a higher photocurrent,lower interfacial charge transfer resistance and Tafel slope as well as better intrinsic activity.
碳化钛 / 污染物降解 / 声-光催化 / 复合材料 / 碳化硅 / 二氧化钛
titanium carbide / pollutant degradation / sono-photocatalysis / composites / silicon carbide / titanium dioxide
| [1] |
田卓妍, 吴明伟, 魏文嘉, |
| [2] |
|
| [3] |
|
| [4] |
|
| [5] |
|
| [6] |
|
| [7] |
|
| [8] |
程余磊, 周沁锋, 张子璇, |
| [9] |
|
| [10] |
|
| [11] |
|
| [12] |
|
| [13] |
|
| [14] |
|
上海市Ⅲ类高峰学科—材料科学与工程(高能束智能加工与绿色制造)
2024年上海市大学生创新训练项目(cs2405004)
/
| 〈 |
|
〉 |