铁掺杂氯氧化铋片簇的球磨制备及光降解性能  

Ball Milling Preparation and Photodegradation Performance of Iron Doped Bismuth Oxychloride Clusters

作　　者：李浩然 蔡宇晴 李子全 柏玲 黄镇东 LI Haoran;CAI Yuqing;LI Ziquan;BAI Ling;HUANG Zhendong(State Key Laboratory for Organic Electronics and Information Displays,Nanjing University of Posts and Telecommunications,Nanjing 210023,China)

机构地区：[1]南京邮电大学材料科学与工程学院,省部共建有机电子与信息显示国家重点实验室,江苏南京210023

出　　处：《广州化学》2025年第2期39-44,I0002,共7页Guangzhou Chemistry

基　　金：国家自然科学基金面上项目(52277219)。

摘　　要：层状多功能材料氯氧化铋(BiOCl)在光催化环境修复领域具有良好的应用前景。本文以FeCl_(3)为Cl源,采用球磨辅助水解工艺方法成功制备了少量Fe掺杂的小片层BiOCl纳米片。研究结果表明Bi(NO_(3))_(3)·5H_(2)O与FeCl_(3)之间的摩尔比为3∶1时,获得的Fe掺杂量为0.38%的BiOCl,具有最大的比表面积(9.77 m^(2)/g)和孔体积(0.09 cm^(3)/g),相较于纯BiOCl,比表面增大5.20倍,孔隙率增大3.00倍;由于掺杂能级的形成,光吸收阈值由纯BiOCl的385.09 nm增加到406.56 nm,有效增强了对可见光的利用率,促进载流子的迁移,抑制光生电子-空穴对的复合。光催化实验表明,0.38%Fe掺杂的BiOCl光催化剂对罗丹明B(RhB)具有优越的光降解活性,在300 W氙灯光源照射下,30 min内大约有99.54%的RhB被降解,降解速率约为纯BiOCl的3.74倍,且该光催化剂还展现出较为优异的回收再利用性能。机理研究表明Fe掺杂的BiOCl在光降解RhB过程中,空穴是主要的降解活性载流子,起主导作用。Bismuth oxychloride(BiOCl),a layered multifunctional material,has a good application prospect in the field of photocatalytic environmental remediation.Herein,trace Fe^(3+)doped small layered BiOCl nanosheets(Fe-BOC)were successfully prepared by using ball milling assisted hydrolysis method with FeCl_(3)as the Cl−source.The results indicate that the Fe-BiOC-2 with 0.38%of Fe^(3+),prepared by milling the mixed precursor of Bi(NO_(3))_(3)·5H_(2)O and FeCl_(3)in a molar ratio of 3∶1,has the largest specific surface area(9.77 m^(2)/g)and pore volume(0.09 cm^(3)/g),about 5.20 and 3.00 times of pure BiOCl,respectively.Due to the formation of doping energy levels,the utilization of visible light and the migration of charge carriers are effectively enhanced,meanwhile,the recombination of photo-generated electron hole pairs are suppressed.The photocatalytic experiment shows that Fe-BOC-2 photocatalyst has the most superior photocatalytic activity for RhB degradation,with approximately 99.54%of RhB being degraded within 30 minutes under the irradiation of a 300 W xenon lamp light source.The testing results also prove that photo-generated holes on the surface of Fe-BOC-2 are the main degradation active carriers,playing a dominant role during the photodegradation of Rh.

关 键 词：氯氧化铋 球磨法 掺杂 光催化 罗丹明B 

分 类 号：X703[环境科学与工程—环境工程]