Bi2WO6-O3协同催化降解染料废水的研究
石家庄学院, 化工学院石家庄市低碳能源材料重点实验室, 河北石家庄 050035
| 摘 要： | 采用水热法制备两种不同形貌特征的Bi2WO6光催化剂，通过SEM、XRD等一系列手段对样品进行了形貌和结构表征，验证了水热法制备Bi2WO6光催化剂时在一定范围内提高反应温度会使Bi2WO6的形貌特征与结构得到改善。利用亚甲基蓝（MB）溶液作为模拟工业有机污水进行单体Bi2WO6、O3单变量平行实验和正交实验验证了Bi2WO6协同臭氧（Bi2WO6/O3）的光催化处理存在协同效果。共考察催化剂投加量、臭氧投加量、pH等条件并优化处理条件及工艺参数以优化协同处理效果，为处理实际污水提供理论基础。结果表明：当催化剂添加量3g/L、O3加入量0.05m³/h、pH值为7时，Bi2WO6/O3的降解率最高可达98.8%，是Bi2WO6单体的7.77倍，是O3单体的1.48倍。此外，根据实验结果，对Bi2WO6/O3在可见光下降解MB的机理进行初步预测：对MB的降解起作用的主要是Bi2WO6产生的空穴（h+），其次是Bi2WO6和O3共同作用生成的•O2-基团，这说明在一定量O3加入范围内，Bi2WO6比O3对污水处理的影响效果更大。 |
| 关 键 词： | Bi2WO6; 亚甲基蓝（MB）; 臭氧; 降解 |
| DOI： | 10.57237/j.res.2023.03.001 |
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收稿日期: 2023-04-17
接受日期: 2023-05-23
在线出版日期: 2023-10-09
Study on Bi2WO6-O3 Synergistic Catalytic Degradation of Dye Wastewater
Shijiazhuang Key Laboratory of Low Carbon Energy Materials, College of Chemical Technology, Shijiazhuang University, Shijiazhuang 050035, China
| Abstract: | Two Bi2WO6 photocatalysts with different morphology characteristics were prepared by hydrothermal method. The morphology and structure of the samples were characterized by a series of methods such as SEM and XRD, verifying that increasing the reaction temperature to a certain extent during the hydrothermal preparation of Bi2WO6 photocatalysts can improve the morphology and structure of Bi2WO6. The use of methylene blue (MB) solution as a simulated industrial organic wastewater for single variable parallel experiments and orthogonal experiments of Bi2WO6 and O3 verifies the synergistic effect of Bi2WO6 and ozone (Bi2WO6/O3) in photocatalytic treatment. We jointly investigated the conditions of catalyst dosage, ozone dosage, pH, and optimized the treatment conditions and process parameters to optimize the synergistic treatment effect, providing a theoretical basis for treating actual wastewater. The results show that when the catalyst dosage is 3g/L and O3 dosage is 0.05m3/h. When the pH value is 7, the highest degradation rate of Bi2WO6/O3 can reach 98.8%, which is 7.77 times that of Bi2WO6 monomer and 1.48 times that of O3 monomer. In addition, based on the experimental results, a preliminary prediction was made on the mechanism of Bi2WO6/O3 degrading MB under visible light: the holes (h+) generated by Bi2WO6 played the main role in MB degradation, followed by the•O2- group generated by the joint action of Bi2WO6 and O3. This indicates that within a certain amount of O3 addition range, Bi2WO6 has a greater impact on sewage treatment than O3. |
| Keywords: | Bi2WO6; Methylene Blue (MB); Ozone; Degradation |
基金
| 1. | 河北省自然科学基金青年基金 (B2021106003) |
| 2. | 河北省高等学校青年拔尖人才计划项目 (BJ2021097) |
参考文献
| [1] | 赵佳倚, 李聪. 高盐工业废水的处理技术研究进展 [J]. 资源节约与环保保, 2021 (03): 100-101. |
| [2] | 祁海江. 工业废水的生产与治理措施 [J]. 冶金管理, 2020 (23): 143-144. |
| [3] | Zheng Sijia, Lu Haifeng et al. The recent development of the aerobic granular sludge for industrial wastewater treatment: a mini review [J]. Environmental Technology Reviews, 2020, 9 (1): 55-66. |
| [4] | Ying Zhang et al. Hierarchically-structured SiO2 -Ag@TiO2 hollow spheres with excellent photocatalytic activity and recyclability [J]. Journal of Hazardous Materials, 2018, 354: 17-26. |
| [5] | Sheng-Xing Long et al. Differential bioaccumulation of mercury by zooplankton taxa in a mercury-contaminated reservoir Guizhou China [J]. Environmental Pollution, 2018, 239: 147-160. |
| [6] | Ronan Guillossou et al. Benefits of ozonation before activated carbon adsorption for the removal of organic micropollutants from wastewater effluents [J]. Chemosphere, 2020, 245 (C): 125530.1-125530.11. |
| [7] | 王佳佳. 新型钨酸铋光催化材料的制备及其在可见光下去除水中有机污染物的研究 [D]. 湖南大学, 2018. |
| [8] | Zhang Yabin, Tan Haibei, et al. TiO2-coated glass hollow fiber membranes: preparation and application for photocatalytic methylene blue removal [J]. Journal of the European Ceramic Society, 2022, 42 (5): 2496-2504. |
| [9] | 陆泽伟, 黄敏怡, 刘国辉, 谢智浩, 朱豪成, 林洁丽. 光催化协同臭氧氧化降解亚甲基蓝溶液实验 [J]. 现代盐化工, 2021, 48 (01): 18-20. |
| [10] | Nanotechnology - Photocatalytics; Report Summarizes Photocatalytics Study Findings from Seoul National University of Science and Technology [Highly Efficient Photocatalytic Methylene Blue Degradation Over Sn(O,s)/TiO2 Photocatalyst Fabricated Via Powder Atomic Layer Deposition...] [J]. Chemicals and Chemistry, 2020: 3341-3348. |
| [11] | 王梦岑, 张淑惠, 张伊晗. Bi2WO6半导体材料光催化剂研究 [J]. 现代盐化工, 2018, 45 (02): 55-56. |
| [12] | Gang Zhao et al. Fabrication of electrospun Bi2WO6 microbelts with enhanced visible photocatalytic degradation activity [J]. Journal of Alloys and Compounds, 2013, 578: 12-16. |
| [13] | He Dong-Qing et al. Photo-Induced Charge Transfer on Pt/Bi2WO6 Composite Photocatalysts. [J]. Journal of nanoscience and nanotechnology, 2020, 20 (3): 1838-1844. |
| [14] | 吴银彪, 李汝琪, 田岳林等.臭氧降解有机污染物的反应机理及影响因素 [J]. 中国环保产业, 2010, 141 (03): 44-47. |
| [15] | Wang Jie et al. Degradation of organic pollutants by ultraviolet/ozone in high salinity condition: Non-radical pathway dominated by singlet oxygen [J]. Chemosphere, 2021, 268 (04): 128796.1-128796.10. |
| [16] | Ioannis A. Katsoyiannis and Silvio Canonica and Urs von Gunten. Efficiency and energy requirements for the transformation of organic micropollutants by ozone, O3 /H2O2 and UV/H 2O2 [J]. Water Research, 2011, 45 (13): 3811-3822. |
