| 摘要: |
| 通过水热法在Ti基底上制备氧化铁的前驱物FeOOH,将长有FeOOH的钛片与硫代硫酸钠放入石英坩埚内,以Ar气作为载气,利用硫代硫酸钠在高温分解得到气相硫单质参与化合反应,然后通过控制煅烧温度,制备氧化铁纳米棒阵列与黄铁矿的原位复合产物。利用X射线衍射仪、场发射扫描电子显微镜和拉曼光谱对复合产物的晶型、形貌、成分、物相等进行分析,以电化学工作站测试Fe2O3/FeS2复合材料的线性扫描伏安曲线、光电流-时间曲线、交流阻抗谱曲线和莫特-肖特基曲线。结果表明,黄铁矿在Fe2O3纳米棒表面均匀生成,样品在500 ℃热处理下具有优异的光电化学性能,其光电流密度可以从0.32 mA/cm2提高到3.68 mA/cm2。 |
| 关键词: 水热法 纳米氧化铁 黄铁矿 气相沉积 |
| DOI：10.3969/j.issn.1673-5005.2019.02.021 |
| 分类号::TB 383 |
| 文献标识码:A |
| 基金项目:国家自然科学基金项目(21476262)；中央高校基本科研业务费专项(15CX05032A) |
|
| In situ synthesis of iron oxide/pyrite composite by vapour deposition process and its photoelectricity properties |
|
ZHANG Yaping1, WANG Jinhui1, YU Lianqing1, WANG Qingqing1, ZHU Haifeng1, JIU Tonggang2
|
|
(1.College of Science in China University of Petroleum(East China), Qingdao 266580, China;2.Qingdao Institute of Bioenergy and Bioprocess Technology, Qingdao 266101, China)
|
| Abstract: |
| FeOOH as a precursor of iron oxide was prepared by hydrothermal method on Ti substrate. The titanium sheet with FeOOH and sodium thiosulfate were placed in a quartz crucible. Then, using Ar gas as carrier gas at high temperature, the sodium thiosulfate decomposed into elemental sulfur in the gas phase and participated in the chemical reaction, through which the composite of pyrite and Fe2O3 nano arrays was in-situ synthesized on iron oxide nanorod arrays by controlling the calcination temperature. The X-ray diffraction, field emission scanning electron microscopy and Raman spectra were used to analyze the crystal phase, morphology of the composites. The linear sweep voltammetry, photocurrent-time impedance and Mott-Schottky curves of Fe2O3/FeS2 composites were measured by electrochemical workstation. The results show that pyrite can be observed on the surface of the Fe2O3 nano arrays. The composite has optimum photo electrochemical properties at the calcination of 500 ℃, and its photocurrent density greatly can be increased from 0.32 mA/cm2 to 3.68 mA/cm2. |
| Key words: hydrothermal method nanoiron oxide pyrite vapour deposition |
