三维Fe@GE-Cu复合材料的制备及其催化性能

Preparation and Catalytic Performance of Three-dimensional Fe@GE-Cu Composite

以葡萄糖为碳源、NH4CI为发泡剂、纳米金属Fe为促进葡萄糖石墨化的催化剂，制备了Fe@GE复合材料，通过uv-vis、Raman分析表明，复合材料Fe@GE石墨化程度高，石墨烯膜缺陷少；再以Fe@GE作为基质材料，采用低温水热法成功将其与纳米cu进行复合，制备了三维Fe@GE-Cu复合材料。通过TEM和FESEM分析证明，Fe@GE与纳米Cu成功复合；通过XRD、FTIR和ICP测试表明，复合材料Fe@GE-Cu在常态下较为稳定。以49mL（200mg／L）重铬酸钾溶液为例，进行催化还原性能测试，加入1mL质量分数为88％的甲酸水溶液后，再加入10mg催化剂Fe@GE-Cu0.65＇在9min时，Cr（VI）已被全部还原，表明该复合材料具有高效催化还原Cr（VI）的性能，能有效解决重金属污染问题。

A Fe@GE composite was synthesized by using glucose as carbon source, NH4CI as foaming agent, iron nanoparticles as catalyst to promote the graphitization of glucose. The resulting Fe@GE composite exhibited high degree of graphitization with less defects, which was confirmed by UV-vis and Raman spectroscopy. Subsequently, Fe@GE composite combined with nano-Cu through low-temperature hydrothermal method to produce a three-dimensional （3D） Fe@GE-Cu composite. The 3D Fe@GE-Cu composite was testified by TEM and FESEM. In addition, the Fe@GE-Cu composite was stable under ambient state according to the analysis results of XRD, FTIR and ICP. The catalytic reduction activiy of the prepared composite was tested by the reaction of 49 mL K2Cr207 solution （200 mg/L）. After adding 1 mL （mass fraction 88%） HCOOH and 10 mg Fe@GE-Cu0.65 catalyst, Cr（VI） was completely reduced within 9 minutes, indicating that the composite Fe@GE-Cu0.65 had high catalytic activity in the reduction of Cr（VI） and could effectively solve the problem of heavy metal pollution.