| 氧化铁薄膜的水热合成及其光电转换性能(英文) | |
| Seed-Mediated Hydrothermal Synthesis and Photoelectrochemical Properties of Hematite Thin Films | |
| 摘要: 通过水热方法在掺杂氟的SnO2(FTO)导电玻璃上制备了不同形貌的氧化铁薄膜。利用无机铁盐浸渍法在FTO玻璃上进行氧化铁晶种的预处理使得所制备的氧化铁薄膜更致密且均一。研究了表面活性剂对氧化铁晶体形貌的影响。使用十二烷基苯磺酸钠(SDBS)和三嵌段聚合物P123做为形貌导向剂分别得到棒状和四方体形貌的氧化铁薄膜。氧化铁薄膜可调的形貌可能是由于表面活性剂和铁氧团簇的组装或者某些晶面吸附了阴离子而改变了生长速率引起的。同时，研究了其光电性能，具有四面体形貌的氧化铁薄膜可以产生较大的光电流，这是由于其缩短了光生空穴的扩散距离。 | |
| 关键词: 氧化铁 水热 薄膜 光电化学 | |
| 基金项目: | |
| Abstract: Iron oxides with different morphologies on F-doped tin oxide (FTO) covered glass substrates were synthesized through hydrothermal route. The pretreatment of iron oxide crystalline seeds on FTO glass through inorganic iron salts solution dipping method makes the as-prepared iron oxide thin films more uniform and compact. The effects of surfactants on the crystal morphologies of iron oxides were studied. Uniform iron oxides thin films with rod-like and tetrahedral morphologies could be obtained through this route by using dodecylbenzensulfonate (SDBS) and triblock copolymer P123 as morphology directing-agent, respectively. The modulated morphologies of iron oxide thin films may be attributed to the assembly between surfactant and ferric oxo-clusters or different velocity of crystalline facets growth induced by adsorbed anions. Photoelectrochemical properties of iron oxide thin films with different morphologies were studied. The larger values of produced photocurrents of iron oxide thin films with tetrahedral morphology may be attributed to the minimization of the diffuse distance for photogenerated holes. | |
| Keywords: iron oxide hydrothermal thin films photoelectrochemical properties | |
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| 万丽娟,王治强,杨再三,罗文俊,李朝升,邹志刚.氧化铁薄膜的水热合成及其光电转换性能(英文)[J].无机化学学报,2011,27(4):747-751. | |
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