三维Fe@GE-Cu复合材料的制备及其催化性能

Preparation and Catalytic Activity of a 3-D Fe@Graphene-Cu Composite

摘要:

以葡萄糖为碳源、NH4Cl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地将其与纳米Cu进行复合，制备了三维Fe@GE-Cu复合材料。通过TEM和FESEM分析，证明了Fe@GE与纳米Cu的成功复合；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40 mL (200 mg/L)重铬酸钾溶液为例进行催化还原性能测试，加入1 mL (88wt%) HCOOH后，再加入10mg 催化剂Fe@GE-Cu0.65，在9 min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。

Abstract:

A Fe@GE composite has been synthesized by using glucose as the carbon source, NH4Cl as the foaming agent, nano-Fe as the catalyst to promote the graphitization of glucose. The Fe@GE composite exhibits high degree of graphitization with less defects, which is confirmed by UV-Vis and Raman. Using Fe@GE as the substrate material, a 3-D Fe@GE-Cu composite has been fabricated with the incorporation of nano-Cu through low-temperature hydrothermal method, as testified by TEM and FESEM. The Fe@GE-Cu composite is stable under ambient state according to the analysis of XRD, FTIR and ICP. The catalytic reduction activity of the composite has been tested through the reaction of 40 mL K2Cr2O7 solution ( 200 mg/L ), after adding 1 mL (88wt%) HCOOH and 10 mg Fe@GE-Cu0.65 catalyst, 100% of Cr(VI) has been reduced in 9 minutes. It shows the composite has high catalytic activity in the reduction of Cr(VI) and could be applied in solving problems of heavy metal pollution.