铋系光催化剂的制备及其对环境污染物的降解性能研究
发布时间：2018-07-28 12:23
【摘要】：本文通过一种新颖的、简单的阴离子交换的方法实现了 BiOCl到多种材料(BiOF、Bi7F11O5和BiF3)的转换。在转换过程中,主要研究了 F/Bi的摩尔比、氟源和反应溶剂对BiOCl样品的影响。X-射线衍射仪(XRD)、扫描电子显微镜(SEM)、高分辨率透射电子显微镜(HRTEM)、比表面积(BET)、紫外可见漫反射光谱(UV-DRS)、荧光光谱(PL)和电化学阻抗谱(EIS)等分析测试手段被用来表征产物的形貌和结构。进一步的,转换机理被提出、各种催化剂的光催化性能被研究。令人惊讶的是,形成的Bi7F1FO5/BiOCl复合物降解甲基橙(MO)的光催化性能是BiOCl样品的3倍。基于以上的实验现象和表征结果分析,Bi7F11O5/BiOCl复合物提高的光催化性能主要归因于形成的Bi7F11O5/BiOCl复合物的异质结,由于异质结明显的提高了光生电荷的分离效率。本次研究对于材料转换提供了一种简单的、有效的方法。
[Abstract]:In this paper, a novel and simple anion exchange method is used to realize the conversion of BiOCl to a variety of materials (BiOF, Bi7F11O5 and BiF3). In the process of conversion, the molar ratio of F/Bi is studied. Effects of Fluorine sources and reaction solvents on BiOCl samples .X- ray diffractometer (XRD), scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM), specific surface area (BET), UV-Vis diffuse reflectance (UV-DRS), fluorescence spectrum (PL) and electrochemical impedance spectroscopy (EIS), etc. Analytical methods are used to characterize the morphology and structure of the product. Furthermore, the conversion mechanism has been proposed and the photocatalytic properties of various catalysts have been studied. Surprisingly, the photocatalytic activity of the resulting Bi7F1FO5/BiOCl complex for the degradation of methyl orange (MO) was three times higher than that of the BiOCl sample. Based on the above experimental phenomena and characterization results, the photocatalytic performance of Bi7F11O5 / BiOCl complex is mainly attributed to the heterojunction of the formed Bi7F11O5/BiOCl complex, and the separation efficiency of photogenerated charge is improved obviously because of the heterojunction of Bi7F11O5 / BiOCl complex. This study provides a simple and effective method for material conversion.
【学位授予单位】：南京信息工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X505;O643.36
本文编号：2150128
[Abstract]:In this paper, a novel and simple anion exchange method is used to realize the conversion of BiOCl to a variety of materials (BiOF, Bi7F11O5 and BiF3). In the process of conversion, the molar ratio of F/Bi is studied. Effects of Fluorine sources and reaction solvents on BiOCl samples .X- ray diffractometer (XRD), scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM), specific surface area (BET), UV-Vis diffuse reflectance (UV-DRS), fluorescence spectrum (PL) and electrochemical impedance spectroscopy (EIS), etc. Analytical methods are used to characterize the morphology and structure of the product. Furthermore, the conversion mechanism has been proposed and the photocatalytic properties of various catalysts have been studied. Surprisingly, the photocatalytic activity of the resulting Bi7F1FO5/BiOCl complex for the degradation of methyl orange (MO) was three times higher than that of the BiOCl sample. Based on the above experimental phenomena and characterization results, the photocatalytic performance of Bi7F11O5 / BiOCl complex is mainly attributed to the heterojunction of the formed Bi7F11O5/BiOCl complex, and the separation efficiency of photogenerated charge is improved obviously because of the heterojunction of Bi7F11O5 / BiOCl complex. This study provides a simple and effective method for material conversion.
【学位授予单位】：南京信息工程大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X505;O643.36
【参考文献】
相关期刊论文 前10条
1 郭理想;阮海兴;陈伟东;;染料废水处理技术方法的研究[J];化工管理;2016年19期
2 李风娟;;活性炭吸附法处理染料废水研究的进展[J];时代农机;2016年04期
3 周黔兰;杨民;李文举;;浅谈湖泊水库富营养化问题成因及防治对策[J];资源节约与环保;2015年06期
4 赵俊娜;李贵霞;刘曼;刘艳芳;赵瑞英;高湘;李再兴;;臭氧氧化法处理模拟染料废水影响因素及降解动力学研究[J];河北科技大学学报;2014年03期
5 李好样;;水污染的危害与防治措施[J];应用化工;2014年04期
6 宋扬;汪晓军;;絮凝沉淀—Fenton试剂氧化法处理含高浓度硫酸盐的洗涤剂生产废水[J];化工环保;2008年01期
7 裴继春;;水污染的危害及防治[J];工业安全与环保;2006年03期
8 郭建博;周集体;王栋;王平;田存萍;喻晖;周小红;;耐盐菌群对高含盐染料模拟废水的脱色实验研究[J];环境污染治理技术与设备;2005年12期
9 罗洁,陈建山,周钢,黄石峰;TiO_2光催化降解印染废水的工艺条件优化[J];化学与生物工程;2005年06期
10 李乔 ,刘伟利;浅谈水体的富营养化[J];水利天地;2004年02期
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