钛箔上生长α-Fe2O3纳米氧化膜及其光电性质研究  

Preparation and Photoelectronic Properties of α-Fe_2O_3 Nanostructure Films on Titanium Foils

作　　者：史占花[1] 王蓉[1] 蔡芳共[1] 杨峰[1] 贾永芳[1] 黎颖[1] 程翠华[2] 赵勇[1,2] 

机构地区：[1]西南交通大学超导与新能源研究开发中心,材料先进技术教育部重点实验室,成都610031 [2]新南威尔士大学材料科学与工程学院,悉尼2052

出　　处：《无机化学学报》2012年第7期1338-1342,共5页Chinese Journal of Inorganic Chemistry

基　　金：中央高校基本科研业务费专项资金(SWJTU12CX017,SWJTU11ZT31,SWJTU11ZT16);国际热核聚变实验堆(ITER)计划专项(2011GB112001);四川省基金(2011JY0031,2011JY0130)资助项目

摘　　要：利用电镀法在钛箔上沉积一层铁镀层,通过热氧化法将铁镀层氧化。利用X射线衍射谱(XRD)、场发射扫描电子显微镜(FESEM)、背散射电子像(BEI)和X射线能量散射谱(EDX)对氧化产物的晶体结构、形貌和组成进行了表征,利用表面光电压谱(SPS)和相位谱(PS)研究了氧化产物的表面光电性质,同时测定了氧化产物的I-V特性。结果表明,铁镀层的表面被热氧化后生成了含α-Fe2O3纳米带和纳米片的纳米氧化膜,α-Fe2O3纳米氧化膜在300～600 nm之间出现了一个与带-带跃迁相关的光伏响应,相位谱显示纳米膜呈n型半导体的导电特征。I-V测试表明在AM 1.5G 100 mW.cm-2标准光强作用下,0.23 V(vs.Ag/AgCl)的偏压下能产生的电流密度为0.58 mA.cm-2。A layer of iron deposit was deposited on titanium foil through electroplating method, and then thermal oxidation of this deposit was carried out. The crystalline phase, morphology and composition of obtained thermal oxidation products were characterized by X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, back-scattered electron imaging （BEI） and energy-dispersive X-ray （EDX） spectroscopy, surface photovoltage and photoelectrochemical properties of these thermal oxidation products were studied by surface photovohage spectrum （SPS）, phase spectrum （PS） and I-V curve test. The results show that α-Fe2O3 nanostructure film was obtained after thermal oxidation of iron deposit. The α-Fe2O3 nanostructure film was composed of nanobelts and nanoplates. A surface photovohage response related to band-band transfer in 300-600 nm was found in α-Fe2O3 nanostructure film. According to phase spectrum, α-Fe2O3 nanostructure film exhibits n-type semiconductor electronic conductivity. The I-V curve of α-Fe2O3 nanostructure film showed that 0.58 mA.cm-z of short circuit current density （Jsc） was achieved at 0.23 V vs. Ag/AgCl under 100 mW·cm^-2 simulated AM1.5 sunlight.

关 键 词：α-Fe2O3纳米氧化膜 α-Fe2O3纳米带 α-Fe2O3纳米片 表面光电压谱 

分 类 号：O614.411[理学—无机化学]