| NH2-UiO-66/BiOBr/Bi2S3光催化剂的合成及其光催化性能 |
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| 引用本文： | 胡长朝,蔡露,李钰,陈子银,张瑞.NH2-UiO-66/BiOBr/Bi2S3光催化剂的合成及其光催化性能[J].西华大学学报(自然科学版),2022,41(4):1-10. |
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| 作者姓名： | 胡长朝 蔡露 李钰 陈子银 张瑞 |
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| 作者单位： | 1.中国石油化工股份有限公司石油勘探开发研究院, 北京 100083 |
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| 基金项目： | 国家重点研发计划（2019YFC1805503）；国家自然科学基金（51508573）；中国石油化工股份有限公司技术开发项目（320075，P21023） |
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| 摘 要： | 采用溶剂热法制备NH2-UiO-66/BiOBr/Bi2S3（UBB）三元复合光催化剂，利用X射线衍射（XRD）、扫描电镜（SEM）表征该催化剂的晶体结构和微观形貌，为了评价其光催化活性及稳定性，在可见光下催化降解有色染料亚甲基蓝（MB，20 mg/L）和罗丹明B（RhB，20 mg/L）。结果表明:NH2-UiO-66的含量为2%时，UBB的光催化活性最好，对MB的降解率在60 min内达到93.5%，对RhB的降解率在30 min内达到98.3%；MB和RhB初始浓度提高到100 mg/L时，光催化降解率仍保持在70%以上；4次循环试验后，UBB的催化活性无明显降低。本文采用紫外可见漫反射光谱（UV-vis DRS）、荧光光谱（PL）和阻抗（EIS）的3种表征方法，分析UBB光催化性能变化的原因，并结合莫特-肖特基（M-S）曲线、活性物质捕捉实验结果，提出适用于UBB三元体系的双Z型电子转移机制。
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| 关 键 词： | 复合光催化剂 BiOBr 光降解 染料 双Z型 |
| 收稿时间： | 2022-03-20 |
Study on Synthesis and Photocatalytic Performance of NH2-UiO-66/BiOBr/Bi2S3 Photocatalyst |
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| HU Changchao,CAI Lu,LI Yu,CHEN Ziyin,ZHANG Rui.Study on Synthesis and Photocatalytic Performance of NH2-UiO-66/BiOBr/Bi2S3 Photocatalyst[J].Journal of Xihua University:Natural Science Edition,2022,41(4):1-10. |
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| Authors: | HU Changchao CAI Lu LI Yu CHEN Ziyin ZHANG Rui |
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| Affiliation: | 1.Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083 China |
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| Abstract: | A ternary composite photocatalyst NH2-UiO-66/BiOBr/Bi2S3 was successfully prepared by solvent thermal method. The crystal structure and microscopic morphology of the photocatalyst were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The photocatalytic activity and stability was investigated by catalytic degradation of colored dyes methylene blue (MB, 20 mg/L) and Rhodamine B (RhB, 20 mg/L) under visible light. The results show that UBB composite photocatalyst has the best photocatalytic performance when the content of NH2-UiO-66 is 2%, and the degradation rate of MB (20 mg/L) and RhB (20 mg/L) could reach 93.5% in 60 minutes, 98.3% in 30 minutes, respectively. The photocatalytic degradation rate remains above 70% when the initial concentration of MB and RhB increas to 100 mg/L. After four cycles of experiments, the photocatalytic activity of UBB could not decrease significantly. Using ultraviolet-visible diffuse reflectance spectrum (UV-vis DRS), fluorescence spectroscopy (PL) and Electrochemical Impedance Spectroscopy (EIS), the reasons for the photocatalytic performance change of UBB were studied. Combining with Mott-Schottky (M-S) curves and active substance trapping experiments, a double Z-type electron transfer mechanism of this ternary system was proposed. |
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