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中文摘要：
以物质的量的比为1：1的Ri（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100nm，长度为3-4μm，并表现出良好的光吸收性能，禁带宽度约为1．9eV，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（0stwald riening）单晶生长机理。
英文摘要：
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.
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