多元异质结CdS/PbS/TiO_2的制备及其对304不锈钢光生阴极保护性能研究
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摘要
采用阳极氧化法制备TiO_2纳米管,通过超声辅助连续离子沉淀法对TiO2纳米管进行CdS/PbS共复合修饰改性。应用X射线衍射(XRD)、扫描电镜(SEM)及其配套的能谱分析(EDS)对CdS/PbS/TiO_2的晶型特征、表面形貌及元素分布进行表征;利用电化学分析方法研究了复合次序对CdS/PbS/TiO_2的光电性能影响,考察了CdS/PbS/TiO_2复合材料对304不锈钢的阴极保护性能。结果表明:成功制备了晶型特征和表面形貌良好的CdS/PbS/TiO_2多元异质结;先复合9次PbS、再复合15次CdS的TiO_2纳米管具有更加优良的光电性能;光照下CdS/PbS/TiO_2复合材料对304不锈钢光生阴极保护性能显著优于单一PbS复合的TiO_2和纯TiO_2;在暗态下CdS/PbS/TiO_2复合材料储能效果良好,可延长对304不锈钢的阴极保护作用。
TiO_2 nanotubes arrays were prepared by anodic oxidation of Ti-plate, and then the TiO_2 nanotubes were co-modified with CdS and CdS via continuously layered ion deposition method assisted with ultrasonic vibration. The prepared multicomponent heterojunction CdS/PbS/TiO_2 was characterized by means of X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy dispersion spectrum(EDS). The photoelectric properties of the photo anodic films were investigated by electrochemical method, in the same times, the photocathodic protection performance of the photo anodic films for 304SS was assessed. The results show that CdS/PbS/TiO_2 multicomponent heterojunction presents good crystalline characteristics and surface morphology, indicating that the CdS/PbS/TiO_2 were prepared successfully. TiO_2 nanotubes arrays modified with 9 cycles of PbS-deposition and 15 cycles of CdS-deposition have better photoelectronic properties. The photocathodic protection performance of CdS/PbS/TiO_2 for 304SS under illumination is significantly better than that of pure TiO_2 or PbS/TiO_2 films solely. It can be explained that the CdS/PbS/TiO_2 composite film gained excellent energy storage, therefore the cathodic protection life-time of the CdS/PbS/TiO_2 composite film for 304SS can be prolonged in the dark state.
TiO_2 nanotubes arrays were prepared by anodic oxidation of Ti-plate, and then the TiO_2 nanotubes were co-modified with CdS and CdS via continuously layered ion deposition method assisted with ultrasonic vibration. The prepared multicomponent heterojunction CdS/PbS/TiO_2 was characterized by means of X-ray diffraction(XRD), scanning electron microscopy(SEM) and energy dispersion spectrum(EDS). The photoelectric properties of the photo anodic films were investigated by electrochemical method, in the same times, the photocathodic protection performance of the photo anodic films for 304SS was assessed. The results show that CdS/PbS/TiO_2 multicomponent heterojunction presents good crystalline characteristics and surface morphology, indicating that the CdS/PbS/TiO_2 were prepared successfully. TiO_2 nanotubes arrays modified with 9 cycles of PbS-deposition and 15 cycles of CdS-deposition have better photoelectronic properties. The photocathodic protection performance of CdS/PbS/TiO_2 for 304SS under illumination is significantly better than that of pure TiO_2 or PbS/TiO_2 films solely. It can be explained that the CdS/PbS/TiO_2 composite film gained excellent energy storage, therefore the cathodic protection life-time of the CdS/PbS/TiO_2 composite film for 304SS can be prolonged in the dark state.
引文
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[5]Du J J,Zhao J W,Cheng X M,et al.Fabrication and photocatalytic performance of CdS/TiO2nanotube arrays[J].J.Synthet.Cryst.,2016,45:535(杜晶晶,赵军伟,程晓民等.CdS/TiO2纳米管阵列的制备及光催化性能[J].人工晶体学报,2016,45:535)
[6]Li X W,Chen R X,Cui T,et al.Preparation and Photocatalytic Properties of PbS Quantum Dots Sensitized B/S/TiO2Composite Nanotube[J].J.Mater.Sci.Eng.,2015,33:630(李晓苇,陈瑞雪,崔彤等.PbS量子点敏化B/S/TiO2复合纳米管的制备及其光催化性能[J].材料科学与工程学报,2015,33:630)
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[8]Zhou Q,Yuan B L,Xu D X,et al.Synthesis,characterization and photocatalytic performance of CdS/TiO2nanotube photocatalyst[J].Chin.J.Catal.,2012,33:850(周强,苑宝玲,许东兴等.CdS/TiO2纳米管可见光催化剂的制备、表征及光催化活性[J].催化学报,2012,33:850)
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[12]Sun S Y,Wang S H,Luo X Z.Research of PbS/CdS quantum dots on TiO2nanotube photovoltaic effect[J].J.Yili Normal Univ.(Nat.Sci.Ed.),2016,10(4):46(孙淑艳,王署辉,罗新泽.PbS/CdS共量子点对TiO2纳米管光伏效应协同作用的研究[J].伊犁师范学院学报(自然科学版),2016,10(4):46)
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