BiOBr/Fe_(3)O_(4)@硅藻土复合磁性材料的光催化性能  

Photocatalytic Performance of BiOBr/Fe_(3)O_(4)@Diatomaceous Composite Magnetic Materials

作　　者：甘英洁 郝文杰 胡峥嵘 王秋艺 宋爱君 鲁勖琳[1,2] 沈莉 党雅茹[1,2] 张志伟 吉国佳[1,2] 王月辉 GAN yingjie;HAO wenjie;HU zhengrong;WANG qiuyi;SONG aijun;LU xulin;SHEN Li;DANG yaru;ZHANG zhiwei;JI guojia;WANG yuehui(College of Chemical Engineering,Hebei Normal University of Science&Technology,Qinhuangdao Hebei,066600,China;Institute of Applied Photochemistry,Hebei Normal University of Science&Technology,Qinhuangdao Hebei,066600,China)

机构地区：[1]河北科技师范学院化学工程学院,河北秦皇岛066600 [2]河北科技师范学院应用光化学研究所,河北秦皇岛066600

出　　处：《河北科技师范学院学报》2023年第1期44-54,共11页Journal of Hebei Normal University of Science & Technology

基　　金：河北省“三三三人才工程”资助项目(项目编号:A201901059,A202001023);河北省引进留学人员资助项目(项目编号:360-0803-YZN-SKYO);河北省重点研发计划项目(项目编号:20327311D);河北省重点研发计划项目(项目编号:22326625D)。

摘　　要：采用水热法制备了Fe_(3)O_(4)纳米粉体、硅藻土负载纳米Fe_(3)O_(4)二元催化剂(Fe_(3)O_(4)@D),并与BiOBr粉体进行了复合,成功合成了BiOBr/Fe_(3)O_(4)@D复合纳米粉体。采用X射线衍射仪(XRD)、场发射扫描电子显微镜(FESEM)、傅里叶变换红外光谱仪(FTIR)等仪器对3种催化剂进行了表征,并用制得的催化剂光降解罗丹明B(RhB)。结果表明,3种催化剂均被成功合成;在3种催化剂中,Fe_(3)O_(4)粉体呈球状,且BiOBr/Fe_(3)O_(4)@D直径处于纳米级;在光催化降解RhB的试验中,BiOBr/Fe_(3)O_(4)@D复合纳米粉体的催化性能最好。进一步考察了BiOBr/Fe_(3)O_(4)@D三元催化剂的投加量、PMS质量浓度、初始pH等因素对其光催化性能的影响。结果表明,光反应30 min时,降解率最好,为99.32%;经过5次循环试验后,降解率仍能达到96.86%,具有良好的稳定性;催化过程中·OH和SO-4·为降解过程中的活性物质,并探究了三元催化剂的光催化机理。Fe_(3)O_(4) nano-powder and diatomaceous earth-loaded Fe_(3)O_(4) binary catalysts(Fe_(3)O_(4)@D)were prepared by hydrothermal method,and compounded with BiOBr powders to get BiOBr/Fe_(3)O_(4)@D composite nano-powder.The three catalysts were characterized by X-ray diffractometer(XRD),field emission scanning electron microscope(FESEM)and Fourier infrared spectrometer(FTIR)to photodegrade rhodamine B(RhB).The results showed that all the three catalysts were successfully synthesized,among which the Fe_(3)O_(4) powder was spherical in shape and the diameter of BiOBr/Fe_(3)O_(4)@D was at the nanometer level.In the test of photocatalytic degradation of RhB,the BiOBr/Fe_(3)O_(4)@D composite nano-powder had the best catalytic performance.The impact of the dosage of BiOBr/Fe_(3)O_(4)@D ternary catalyst,the mass concentration of PMS and the initial pH on its photocatalytic performance were studied.The results showed that the best degradation rate of 99.32%was achieved at 30 min of photoreaction.After five cycles,the degradation rate could still reach 96.86%,with good stability.·OH and SO_(4) were the active substances in the degradation process.The photocatalytic mechanism of the ternary catalyst was studied.

关 键 词：BiOBr/Fe_(3)O_(4)@D PMS 光催化性能 罗丹明B 

分 类 号：X703[环境科学与工程—环境工程]