BiOI/MWCNTs复合光催化剂的调控及其性能研究  

Study on Regulation and Performance of BiOI/MWCNTs Composite Photocatalyst

作　　者：尹鑫 胡家玮[1] 张惠宁 YIN Xin;HU Jiawei;ZHANG Huining(College of Civil Engineering,Lanzhou University of Techbology,Lanzhou 730050,China;Institute of Nanomaterials Application Technology,Gansu Academy of Sciences,Lanzhou 730000,Ch)

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]甘肃省科学院纳米应用技术研究室,甘肃兰州730000

出　　处：《甘肃科学学报》2022年第6期50-55,共6页Journal of Gansu Sciences

基　　金：国家自然科学基金(52060015;51808274);甘肃省科技计划资助(20JR5RA476);甘肃省科学院青年科技创新基金(2019QN-08);中国博士后科学基金(2019M653796)。

摘　　要：采用溶剂热法,以Bi(NO)·5HO、KI和MWCNTs为原料,制备不同MWCNTs掺杂量的BiOI/MWCNTs复合光催化剂。通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)等技术对样品的结构形貌和性能进行分析,并以罗丹明B(RhB)模拟废水对光催化剂的性能进行评价。结果表明,MWCNTs的掺杂改变了BiOI的微观结构,增大其禁带宽度,提高载流子分离效率。MWCNTs掺杂量为0.15%时,对RhB溶液的降解速率最快,150 min即可降解80%的RhB溶液,降解速率是单体BiOI的3倍,实验数据符合伪一阶动力学模型。研究表明适量MWCNTs掺杂BiOI可以提高单体BiOI在可见光下的催化活性。Using Bi(NO)·5 HO,KI and MWCNTs as raw materials, BiOI/MWCNTs composite photocatalysts with different doping amounts of MWCNTs were prepared by solvothermal method.The structure morphology and performance of the sample are analyzed by X-ray diffractometer(XRD),scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS) and other technologies.Rhodamine B(RhB) simulated waste water was used to evaluate the performance of the photocatalyst.The results show that the doping of MWCNTs changes the microstructure of BiOI,increases its band gap, and improves the efficiency of carrier separation.When the doping amount of MWCNTs is 0.15%,the efficiency of degrading RhB solution is the fastest, 80% of RhB solution can be degraded in 150 minutes, and the degradation rate is 3 times that of monomer BiOI.The experimental data conforms to the pseudo first-order kinetic model.The experimental data conforms to the pseudo first-order kinetic model.

关 键 词：BiOI/MWCNTs 掺杂 载流子 禁带宽度 

分 类 号：O6[理学—化学]