Abstract
通过引入铁氧化物并煅烧处理对蒙脱石进行优化设计，成功合成了铁柱撑蒙脱石复合催化剂(FPMt).采用X射线衍射(XRD)、热重分析(TG)、透射电子显微镜(TEM)、傅里叶变换红外光谱(FT-IR)、N2吸附-脱附(BET)等分析方法对FPMt样品结构与表面性质进行表征，以邻硝基苯酚(2-NP，22 μmol/L)作为代表性污染物研究FPMt的还原催化活性. 结果表明：与蒙脱石相比，FPMt表面电子传输活性得到明显提高，原因是引入赤铁矿的FPMt吸附位点增多同时酸位减少，从而显著增强材料表面的还原催化活性. 除溶液pH和Fe(Ⅱ)浓度外，催化剂的结构完整性、赤铁矿的结晶度等均为影响催化剂还原活性的重要因素. 最后提出了FPMt表面络合态Fe(Ⅱ)的还原催化活性显著提高的介导机制.
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