| 一维Bi2Fe4O9纳米棒阵列的无模板水热合成 | |
| Template-Free Growth of One-Dimensional Bi2Fe4O9 Nanorods Array by Hydrothermal Synthesis | |
| 摘要: 以物质的量的比为1：1的Bi（NO3）3·5H2O和Fe（NO3）3·9H2O为反应原料，以NaOH为矿化剂，利用水热法在Ti基板上成功制备出一维Bi2Fe4O9纳米棒阵列。对该纳米棒阵列分别进行XRD、FE-SEM、HR-TEM和UV-Vis测试，得到Bi2Fe4O9纳米棒的直径为100 nm，长度为3~4 μm，并表现出良好的光吸收性能，禁带宽度约为1.9 eV，对甲基紫溶液的光降解率达到86%，其活性明显高于市售P25（TiO2）。该纳米棒阵列的生长方式完全遵循奥斯瓦尔德熟化（Ostwald ripening）单晶生长机理。 | |
| 关键词: 无模板 水热合成 Bi2Fe4O9纳米棒阵列 光降解 生长机理 | |
| 基金项目: 国家自然科学基金（No.50802066，51072145，51272191，51372181），中央高校自主创新基金（No.2013-Ⅳ-034）资助项目。 | |
| Abstract: One-Dimensional Bi2Fe4O9 nanorod arrays on Ti substrates were synthesized with Fe(NO3)3·9H2O and Bi(NO3)3·5H2O (molar ratio 1:1) by the hydrothermal method, using NaOH as the pH value adjuster and mineralizer. The nanorod arrays were characterized with X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), high-resolution TEM (HRTEM), Ultraviolet visible absorption spectroscopy (UV-Vis). The nanorods are 100 nm in diameter and 3~4 μm in length, and show good optical absorption properties with a band gap of 1.90 eV. The photo degradation rate of methyl violet solution over the title nanorods is 86%, which is significantly higher than that over commercial P25 (TiO2). The growth mechanism of the nanorod arrays completely follows the Ostwald ripening single crystal growth mechanism. | |
| Keywords: template-free Hydrothermal Synthesis Bi2Fe4O9 nanorods array photo degradation Growth mechanism | |
| 投稿时间：2013-12-23 修订日期：2014-03-20 | |
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| 孙华君,刘依,张勇,郭姗姗,陈文.一维Bi2Fe4O9纳米棒阵列的无模板水热合成[J].无机化学学报,2014,30(8):1801-1806. | |
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