| g-C3N4/Bi2S3复合物的制备及可见光催化降解MO |
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| 引用本文： | 张志贝,李小明,陈飞,杨麒,钟宇,徐秋翔,杨伟强,李志军,陈寻峰,谢伟强. g-C3N4/Bi2S3复合物的制备及可见光催化降解MO[J]. 环境科学, 2016, 37(6): 2393-2400 |
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| 作者姓名： | 张志贝 李小明 陈飞 杨麒 钟宇 徐秋翔 杨伟强 李志军 陈寻峰 谢伟强 |
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| 作者单位： | 湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082,湖南大学环境科学与工程学院, 长沙 410082;环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 |
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| 基金项目： | 国家自然科学基金项目(51278175,51378188,51478170);国际科技合作项目(2012DFB30030-03) |
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| 摘 要： | 采用简单溶剂热方法成功合成可见光催化剂g-C_3N_4/Bi_2S_3.合理地利用X射线衍射(XRD)、傅立叶红外光谱分析仪(FTIR)、场发射扫描电子显微镜(FESEM)、透射电子显微镜(TEM、HRTEM)、紫外可见漫反射光谱(UV-vis DRS)等表征手段对合成的样品进行了表征.与纯g-C_3N_4和Bi_2S_3相比,g-C_3N_4/Bi_2S_3复合物对甲基橙(MO)的可见光催化降解具有更高的降解效率.根据能带分析结果,电子-空穴对的有效分离增强了光催化效率.此外,提出了g-C_3N_4/Bi_2S_3对MO的光催化降解过程以阐明降解机制.提供了一种经济简单并易于规模化扩大开发可见光响应催化剂的方法,并在废水处理中具有潜在的应用价值.
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| 关 键 词： | g-C3N4/Bi2S3 可见光 光催化 甲基橙 光降解 |
| 收稿时间： | 2015-09-20 |
| 修稿时间： | 2016-01-12 |
Preparation of Visible-light-induced g-C3N4/Bi2S3 Photocatalysts for the Efficient Degradation of Methyl Orange |
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| ZHANG Zhi-bei,LI Xiao-ming,CHEN Fei,YANG Qi,ZHONG Yu,XU Qiu-xiang,YANG Wei-qiang,LI Zhi-jun,CHEN Xun-feng and XIE Wei-qiang. Preparation of Visible-light-induced g-C3N4/Bi2S3 Photocatalysts for the Efficient Degradation of Methyl Orange[J]. Chinese Journal of Environmental Science, 2016, 37(6): 2393-2400 |
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| Authors: | ZHANG Zhi-bei LI Xiao-ming CHEN Fei YANG Qi ZHONG Yu XU Qiu-xiang YANG Wei-qiang LI Zhi-jun CHEN Xun-feng XIE Wei-qiang |
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| Affiliation: | College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China,College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China and College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control(Hunan University), Ministry of Education, Changsha 410082, China |
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| Abstract: | Visible light responsive heterojunctions of graphitic carbon nitride (g-C3N4) and Bi2S3 were successfully designed and constructed by a simple solvothermal process. The as-prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM) and UV-vis diffuse reflectance spectroscopy (DRS). Under visible light irradiation, the as-prepared g-C3N4/Bi2S3 photocatalysts exhibited highly enhanced photochemical efficiency in the degradation of methyl orange (MO) compared with pure g-C3N4 and Bi2S3. On the basis of the calculated energy bands, the excellent enhancement was attributed to the efficient separation of photoinduced electron-hole pairs. In addition, a detailed degradation pathway of MO degradation by g-C3N4/Bi2S3 composites was proposed to further elucidate the inner photodegradation mechanism. This research may provide a cost-effective and easy-scaling up approach to develop visible-light-driven photocatalysts, which could be applied in wastewater treatment. |
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| Keywords: | g-C3N4/Bi2S3 composites visible light photocatalysis methyl orange(MO) photodegradation |
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