| Co3O4/TiO2复合光催化剂的制备及其对甲苯的协同降解性能 |
| Co3O4/TiO2 composite photocatalyst: Preparation and synergistic degradation performance of toluene |
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| 摘要: 采用水热法制备TiO2纳米带和Co3O4/TiO2催化材料。通过X射线衍射、扫描电镜、透射电镜、X射线电子能谱和荧光光谱对催化剂进行表征。室温下，相对湿度为50.0%，气体总流量为1.0 L·min-1，空速为1.05×104 h-1，甲苯的体积浓度为25.0 μL·L-1时，以2个6 W真空紫外光灯为光源对催化材料进行甲苯的降解和矿化研究。结果表明，所制备的催化剂为纳米带状，Co3O4的负载抑制了光生电子-空穴的重组，能有效提高催化性能。当以氮气作载气时，Co3O4负载量(质量分数)为6.0%的Co3O4/TiO2具有最好的催化效果，甲苯的降解率仅为34.7%，甲苯的降解主要是真空紫外光的光解作用；当以空气作载气时，有O3产生，Co3O4负载量为6.0%的Co3O4/TiO2和真空紫外协同作用对甲苯降解率为91.7%，矿化率为74.6%，甲苯降解率是氮气作载气条件下的2.6倍。 |
| 关键词: 真空紫外 光催化 甲苯 降解 Co3O4/TiO2 |
| 基金项目: |
| Abstract: TiO2 nanobelts and Co3O4/TiO2 catalytic materials were prepared using the hydrothermal method. The catalyst was characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray electron spectroscopy, and fluorescence spectroscopy. At room temperature, with a relative humidity of 50.0%, the total gas flow rate of 1.0 L·min-1, the space velocity of 1.05×104 h-1, and toluene volume concentration of 25.0 μL· L-1, two 6 W vacuum ultraviolet lamps were used as light sources to catalyze, degrade, and mineralize toluene. The results show that the prepared catalyst is in the shape of nano-ribbons. The loading of Co3O4 inhibits the recombination of photogenerated electrons and holes and can effectively improve the catalytic performance. The Co3O4/TiO2 with a load of 6.0% Co3O4 has the best catalytic effect. When N2 was used as a carrier gas, the degradation rate of toluene was only 34.7%. The toluene degradation is mainly due to the photolysis of vacuum ultraviolet light. When air was used as a carrier gas, O3 was produced. The Co3O4/TiO2 with a load of 6.0% and vacuum ultraviolet synergistically promote toluene degradation. The highest degradation rate of toluene was 91.7% and the mineralization rate was 74.6%. The degradation rate of toluene was 2.6 times that of nitrogen as a carrier gas. |
| Keywords: vacuum ultraviolet photocatalysis toluene degradation Co3O4/TiO2 |
| 投稿时间：2024-06-24 修订日期：2024-10-08 |
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| 周飞,贾晓琳.Co3O4/TiO2复合光催化剂的制备及其对甲苯的协同降解性能[J].无机化学学报,2024,40(11):2232-2240. |
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