氧化铁/还原氧化石墨烯/钨酸铋复合光催化剂的光催化性能研究  

Study on property of Fe_(2)O_(3)-rGO-Bi_(2)WO_(6) composite photocatalyst

作　　者：付璐[1] 刘顺强[1] 张浩[1] 钱清华[1] 张萍[1] 杜岗[1] Fu Lu;Liu Shunqiang;Zhang Hao;Qian Qinghua;Zhang Ping;Du Gang(Lianyungang Technical College,Lianyungang 222006)

机构地区：[1]连云港职业技术学院,连云港222006

出　　处：《化工新型材料》2021年第4期122-126,共5页New Chemical Materials

基　　金：江苏省高等自然科学研究面上项目(20KJD430007);江苏省高等学校大学生创新创业训练计划项目(202011050018Y);江苏省高等学校自然科学研究面上项目(19KJD520004);连云港市“521”项目资助(2017001)。

摘　　要：采用一步水热法成功制备出了具有完整微球形貌的氧化铁/还原氧化石墨烯/钨酸铋(Fe_(2)O_(3)-rGO-Bi_(2)WO_(6))异质结复合光催化剂。将不同光催化剂复合、离子掺杂、氧化石墨烯(GO)复合这3种钨酸铋(Bi_(2)WO_(6))催化性能改性方法有效地结合在一起。通过X射线衍射仪(XRD)、扫描电子显微镜(FE-SEM)、紫外可见分光光度计(UV-Vis)等手段系统地研究了不同Fe/Bi比值下Fe_(2)O_(3)-rGO-Bi_(2)WO_(6)样品形貌、晶体结构和可见光光催化性能及其变化规律。结果表明:在石墨烯、异质结以及少量Fe3+离子掺杂的协同作用下,随着Fe/Bi比值从0到1,Fe_(2)O_(3)-rGO-Bi_(2)WO_(6)样品的吸收波长出现先红移再转变为蓝移的现象,禁带宽度相应的先减小后增大,光催化降解速度先增快后逐渐减慢。Fe_(2)O_(3)-reduced graphene oxide(rGO)-Bi_(2)WO_(6)(F-r-B)heterojunction composite photocatalyst with complete microspherical morphology was successfully synthesized by one-step hydrothermal method.The effective combination of three modification methods for BWO catalytic performance,such as combination of different photocatalysts,ion doping and GO composite,was combined effectively together.The morphology,crystal structure,visible-light photocatalytic performance and their evolution trend of F-r-B samples with the different Fe/Bi values were systematically studied using X-ray diffractometer (XRD),scanning electron microscope (FE-ESEM),UV-visible spectrophotometer (UV-Vis)and other analytical instruments.On account of the synergistic effect of rGO,heterojunction and minor Fe3+ion doping,the absorption wavelength of F-r-B samples firstly undergone a red shift and then changed to a blue shift,the band gap correspondingly decreased first and then increased,and its visible light photocatalytic activity first increased and then decreased.

关 键 词：氧化石墨烯 复合光催化剂 离子掺杂 可见光光催化活性 

分 类 号：O643.36[理学—物理化学] TB33[理学—化学]