| 摘要: |
| 采用水热法在掺氟导电玻璃(FTO)上生长TiO2纳米棒阵列。通过电化学伏安法将氧化石墨烯还原并沉积在TiO2纳米棒阵列上,再经过化学水浴沉积硫化镉,形成CdS/石墨烯/TiO2阵列复合材料。用X射线衍射仪、扫描电子显微镜及X射线能量色散仪对样品的晶型、形貌以及成分进行分析。通过电化学工作站表征样品交流阻抗、开路电位、光电流响应及光化学能转换效率。结果表明,复合材料的电荷转移电阻约是未修饰的TiO2纳米棒阵列的1/17,光电流比未修饰的TiO2纳米棒阵列提高约2.5倍,在外加电压为-0.6 V时可达到2.2％。 |
| 关键词: TiO2纳米棒 硫化镉 石墨烯 光电化学性能 |
| DOI：10.3969/j.issn.1673-5005.2016.03.024 |
| 分类号::TM 912 |
| 基金项目:国家自然科学基金项目(21476262);青岛市科技发展计划项目(14-2-4-108-jch);中央高校基本科研业务费专项(15CX05032A) |
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| Photoelectrochemical properties of CdS/graphene /TiO2 nanorod arrays |
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ZHANG Yaping1, HUANG Chengxing1, DONG Kaituo1, ZHANG Zhiping1, YU Lianqing1, LI Yan2
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(1.College of Science in China University of Petroleum, Qingdao 266580, China;2.College of Mechanical and Electrical Engineering in China University of Petroleum, Qingdao 266580, China)
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| Abstract: |
| Titanium dioxide nanorod arrays were prepared by hydrothermal method on FTO glass substrate. Graphene oxide was reduced by electrochemical voltammetric method and electro-deposited on the TiO2 nanorod arrays, then chemical deposition CdS on the TiO2 nanorod arrays was carried out. The obtained sam ples were analyzed by X-ray diffraction (XRD),scanning electron microscope (SEM) and energy dispersive X-ray detector . Photoconversition efficiency, electrochemical impedance spectroscopy, open-circuit potential response and photocurrent response of the samples were analyzed by electrochemical workstation. The results show that the charge transfer resistance of material is approximately 1/17 after CdS/graphene modification, the photocurrent increases by 2.5 times, and the photoconversition efficiency can reach 2.2% under the applied voltage of -0.6 V. |
| Key words: TiO2 nanorod CdS graphene photoelectrochemical properties |
