BiVO4修饰多孔陶瓷的制备及光催化性能的研究
石家庄学院, 化工学院, 环境催化及清洁技术研究创新中心, 石家庄市低碳能源材料重点实验室, 河北石家庄 050035
| 摘 要： | 本文利用水热法合成了BiVO4单体，并通过聚乙烯醇将其修饰到有机泡沫浸渍法制备的多孔陶瓷载体上，得到BiVO4/多孔陶瓷复合光催化剂，利用XRD、SEM等仪器对该催化剂的组成及形貌进行表征。结果表明，该实验所制备的催化剂修饰效果优良，具有较低的禁带宽度，对太阳光的利用率有一定程度的提高。并且该催化剂具有较高的气孔率和比表面积，对液体浸润性良好，可以有效地与液体中的污染物接触，提高了降解效率。通过使用该催化剂对亚甲基蓝（MB）溶液的降解来分析催化剂的光催化活性。数据表明，当BiVO4的负载量为20%时，BiVO4/多孔陶瓷在可见光下2.5 h内对亚甲基蓝溶液的降解效率高达80.83%。循环实验证明BiVO4/多孔陶瓷具有良好的光催化性能稳定性，这得益于多孔陶瓷载体高效的回收作用。因此本研究对光催化技术的高效应用具有极大的研究意义。 |
| 关 键 词： | BiVO4; 多孔陶瓷; 光催化降解; 水热法; 有机泡沫浸渍法 |
| DOI： | 10.57237/j.mater.2024.03.001 |
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收稿日期: 2024-03-27
接受日期: 2024-04-30
在线出版日期: 2024-05-23
Preparation of BiVO4 Modified Porous Ceramics and Study on Photocatalytic Performance
Environmental Catalysis and Clean Technology Research and Innovation Center, Shijiazhuang Key Laboratory of Low Carbon Energy Materials, School of Chemical Engineering, Shijiazhuang University, Shijiazhuang 050035,
| Abstract: | In this paper, BiVO4 monomer was synthesized by hydrothermal method, and modified by polyvinyl alcohol to a porous ceramic carrier prepared by organic foam impregnation method to obtain a BiVO4/porous ceramic composite photocatalyst, and the composition and morphology of the catalyst were characterized by XRD, SEM and other instruments. The results show that the catalyst prepared in this experiment has excellent modification effect, has a low band gap, and improves the utilization rate of sunlight to a certain extent. In addition, the catalyst has high porosity and specific surface area, good wettability to liquid, and can effectively contact with pollutants in liquid, which improves the degradation efficiency. The photocatalytic activity of the catalyst was analyzed by the degradation of methylene blue (MB) solution by using this catalyst. The data showed that when the loading of BiVO4 was 20%, the degradation efficiency of BiVO4/porous ceramics for methylene blue solution within 2.5 h under visible light was as high as 80.83%. Cycling experiments show that BiVO4/porous ceramics have good photocatalytic performance stability, which is due to the efficient recovery of porous ceramic carriers. Therefore, this study is of great significance for the efficient application of photocatalytic technology. |
| Keywords: | BiVO4; Porous Ceramics; Photocatalytic Degradation; Hydrothermal Method; Organic Foam Impregnation Method |
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