中文摘要：

通过氧化-沉淀法合成了具有光催化活性的α-FeO（OH）纳米棒，用TGA、SEM、BET等分析方法进行结构表征和性能测试，并对其降解偶氮类染料的性能进行了研究。结果表明，产物主要成分为针铁矿α-FeO（OH），另含有少量Fe3O4；产物长径比较高，比表面积为32．89m2／g，并具有优良的磁性能。在作为光催化剂降解偶氮类染料甲基橙的实验中，α-Fe0（0H）纳米棒表现出较好的催化效果。在21W、50W模拟光源和自然光照下降解3h以上，其脱色率分别为29．8％、43．5％o和76．4％。

英文摘要：

α-FeO（OH） nanorods were prepared by oxidation-precipitation process, and characterized by TGA, SEM, BET, etc. The photocatalytic properties of α-FeO（OH） nanorod were also tested. The results show that the main composition of product is qoethite（α-FeO（OH））, with a little FeaO4 mixed in. The nanorods have a greater length-diameter ratio, good magnetic property, and the specific surface area is 32. 89m2/g. The degradation experi- ments indicate that α-FeO（OH） nanorods have effective photocatalytic activity. The decolouring rates of methyl orange solution are 29.8%, 43.5% and 76. 4% after more than 3 hours＇ irradiation under 21W, 50W xenon lamp, and natural lighting.