高性能CeO2/片状CdS复合光电极材料的制备及在光阴极保护中应用（英文）  

Preparation of CeO2/Flake-like CdS Composites as High-performance Photoanodes for Photoelectrochemical Cathodic Protection

作　　者：魏科年 刘展[2] 左士祥 严向玉[2] 吴凤芹 李霞章[2] 姚超[1,2] 刘孝恒[1] WEI Ke-Nian;LIU Zhan;ZUO Shi-Xiang;YAN Xiang-Yu;WU Feng-Qin;LI Xia-Zhang;YAO Chao;LIU Xiao-Heng(Key Laboratory for Soft Chemistry and Functional Materials,Ministry of Education,Nanjing University of Science and Technology,Nanjing 210094,China;Advanced Catalysis and Green Manufacturing Collaborative Innovation Center,School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]南京理工大学软化学与功能材料教育部重点实验室,南京210094 [2]常州大学石油化工学院,江苏省先进催化与绿色制造协同创新中心,常州213164

出　　处：《无机材料学报》2019年第12期1334-1340,共7页Journal of Inorganic Materials

基　　金：Fundamental Research Funds for the Central Universities(30916014103);Key R&D Programs of Jiangsu Province(BE2018649);Innovation Team of Six Talent Peaks of Jiangsu Province(XCL-CXTD-029);Key R&D Programs of Changzhou City(CE20185007)

摘　　要：通过逐步合成法制备了具有储存电子和物理阻隔功能的CeO2/CdS纳米复合材料,并用于光电阴极保护。通过XRD,TEM,UV-Vis和PL等手段对制备的纳米复合材料进行表征。在模拟白光照射下研究不同质量比的CeO2/CdS复合材料的光电化学性质。在黑暗条件下,涂有CeO2/CdS(质量比0.2:1.0)的304不锈钢涂层的电位比CeO2/CdS(质量比0.2:1.0)粒子涂层更正。在白光照射下,CeO2/CdS(质量比0.2:1.0)复合材料的最大光电流密度为700μA·cm–2,涂有CeO2/CdS(质量比0.2:1.0)的304不锈钢涂层的电位为–650 mV(vs.SCE),明显低于304不锈钢腐蚀电位(–200 mV vs.SCE),表明片状CdS具有物理阻隔性能及CeO2/CdS复合材料具有显著的光电化学性能。这主要是由于CeO2纳米颗粒和CdS纳米片之间形成了异质结,促进了光致电子和空穴的有效分离,从而提高了光电转换效率。此外,由于CeO2具有储存电子的功能,在黑暗条件下可以继续释放电子,能够提供12 h的阴极保护性能。CeO2/CdS nanocomposites with the function of storing electrons and physical barrier were fabricated for photocathodic protection through a stepwise synthetic route.The obtained smples were characterized by XRD,TEM,UV-Vis and PL.The photoelectrochemical properties of CeO2/CdS with different mass ratios were investigated under white light irradiation.The maximum photocurrent density of CeO2/Cd S(mass ratio 0.2:1.0)is 700μA·cm-2 and the potential of the 304 stainless steel coated with CeO2/Cd S(mass ratio 0.2:1.0)shifts to–650 mV(vs.SCE),which is significantly lower than the corrosion potential(–200 mV vs.SCE).The above results indicate that the CeO2/CdS composites exhibit remarkable photo cathodic properties which are attributed to the heterostructure of CeO2 nanoparticles and CdS nanosheets,and the structure facilitates the separation of photo-induced electron and hole.Furthermore,the CeO2/CdS composites can also provide cathodic protection for 12 h in the dark.

关 键 词：CeO2/CdS复合材料 异质结构 物理阻隔 光电化学阴极保护 

分 类 号：TB332[一般工业技术—材料科学与工程]