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β-FeOOH的无模板水热合成及其光催化降解偶氮染料甲基橙的研究

DOI: 10.7685/j.issn.1000-2030.2013.02.022, PP. 132-136

Keywords: 降解,甲基橙,羟基自由基,β-FeOOH,光催化

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Abstract:

以尿素为均相沉淀剂,无模板水热合成了纳米棒状的β-FeOOH。采用X射线衍射和场致扫描电镜技术表征制备样品。在异相光芬顿反应中研究β-FeOOH降解甲基橙的效率。结果显示50min内甲基橙能被异相光催化过程中产生的羟基自由基降解100%;当反应液初始pH值增加到9.5,50min内甲基橙的降解效率仅下降到93.45%,这意味着制备的β-FeOOH催化剂能很好地克服均相光芬顿反应中pH值范围狭窄的缺点。β-FeOOH催化剂的装载量和H2O2浓度同样对甲基橙降解效率有重要影响。β-FeOOH催化剂多次重复使用后仍然具有保持较高催化活性的能力。

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