GO-CdS film was successfully modified onto FTO/glass through two simple steps of hydrothermal and adsorption-heat method.The morphology and characterization of the composites was investigated by FESEM, TEM,XRD and FT-IR.The photoelectric properties of the materials and the release of Cd(Ⅱ)were examined using an electrochemical workstation and an atomic absorption.The results show that the photoelectric effect of the graphene materials is obviously improved,and the maximum photocurrent density of the CdS composites covering GO and r-GO can reach 1.73 and 1.47 times of that of the pure CdS electrode respectively.The stability of the graphene/CdS electrodes have also been significantly enhanced.After continuous illumination for one hour,photocurrent density of modified electrode is up to 73%,far more than the unmodified electrode 33%, and the morphology of CdS did not change significantly.The graphene sheets play a dual role in the meantime. It acts not only as an excellent conductor to increase the transmission efficiency of photoelectrons,which obvi-ously improve PEC performance of CdS,but also as a protective film to shield CdS from photocorrosion,which greatly enhance stability of CdS and reduce the dissolution of Cd(Ⅱ).%采用水热沉积法制备了CdS/FTO 玻璃复合光电材料,并进一步通过吸附-热处理法将 GO、r-GO 修饰至该光电活性材料表面,通过场发射扫描电镜(FESEM)、透射电镜(TEM)、X射线衍射(XRD)、傅里叶红外(FT-IR)等对该复合电极的形貌和结构进行了表征,使用电化学工作站、原子吸收分光光度计检测了材料的光电性能和稳定性.结果表明,石墨烯材料修饰对CdS的光电效果提升明显,经GO、r-GO 修饰后的的CdS复合电极的最大光生电流密度分别提高至修饰前的1.73和1.47倍,电极的稳定性也得到显著增强,3600 s 光照后,光电流密度保持率可达73%,远超未修饰电极的33%,且CdS的颗粒状态没有明显变化.
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