Trinuclear Fe(III) acetate complex intercalated montmorillonite Fenton catalysts were successfully prepared by a facile ion exchange process. The obtained catalysts were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy, X-ray absorption fine structure, and inductively coupled plasma-atomic emission spectrometry. The results showed that the montmorillonite's surface area was greatly increased after the trinuclear iron cluster intercalated. A few amorphous nano-fibre iron oxides were anchored on the surface of the catalyst. The prepared catalyst exhibited high efficiencies for the degradation and mineralization of rhodamine B in the presence of H2O2 under visible light irradiation. Furthermore, the main active species in catalytic reaction process have been investigated. Based on the experimental results, a possible mechanism was discussed and proposed.%利用简单的阳离子交换法制备了系列三核铁簇合物插层蒙脱土固相光助芬顿催化剂.利用X射线粉末衍射、扫描电镜、透射电镜、紫外-可见漫反射光谱、X射线精细结构能谱及等离子体发射光谱对催化剂进行了表征.结果表明,经三核铁簇合物柱撑后,蒙脱土的比表面积显著增加,其表面附着少量纳米纤维织构状的无定形铁氧化物.在过氧化氢及可见光激发下,所制催化剂能够快速降解并矿化染料罗丹明B,表现出良好的多相可见光助芬顿性能.结合反应过程中活性物种的表征结果,初步探讨了该催化剂的可见光助芬顿降解机理.
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