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纳米铁/粘土杂化材料的制备与表征
Preparation and characterization of nano-iron/clay hybrid materials
以钠基蒙脱土为原料，利用离子交换法合成了纳米铁/粘土杂化材料。通过XRD、TEM等分析检测手段，对其微观结构进行了表征，并通过邻氯苯酚降解实验考查纳米铁/粘土杂化材料的降解性能。结果表明，制成的材料中的纳米铁多数以40～60nm球形颗粒为主，均匀地分散在粘土中；材料较为稳定，无需特殊保存即可稳定存放，无明显氧化现象；在相同工艺条件下，纳米铁/粘土杂化材料对邻氯苯酚去除能力与纳米铁相近，去除率高达98.4%。
By the ionexchange process,nano-iron/clay hybrid materials have been prepared. Transmission electronic microscopy (TEM), X-ray diffraction (XRD) are used to observe the microstructure and properties of the products are tested by O-chlorophenol degradation experiments. The results show that most of the nano-iron in the products is between 40-60nm and in ball shape, homodisperse in the clay and rarely aggregation. The products can stable without oxidation when preserved in ordinary conditions. And 30 min later after being added to O-chlorophenol solution, the degradation rate can reach as high as 98.4%,which shows advanced dechlorination properties.
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