多孔碳负载Cu2O/Cu双相催化剂的制备及其在对硝基苯酚还原中的应用

Preparation of Porous Carbon Supported Cu2O/Cu Dual-phase Catalyst and Its Application in Nitrophenol Catalytic Reduction

摘要:

采用溶剂热合成和气氛焙烧后处理方法制备了多孔碳负载的Cu2O/Cu双相纳米晶，并系统探究了该催化剂在对硝基苯酚催化还原中的催化活性。XRD表征表明在空气中焙烧金属有机框架材料Cu-BTC可以得到CuO纳米材料，而在氮气气氛中焙烧Cu-BTC则可以得到多孔碳负载的Cu2O/Cu双相纳米晶材料。论文通过扫描电镜和透射电镜对比了不同条件下制备的铜基催化剂的微观形貌，相对于空气气氛中制备的CuO催化剂，氮气气氛中制备的Cu2O/Cu双相催化剂具有更小的粒径、分散度和高比表面积。对硝基苯酚催化还原实验结果表明, 相对于空气气氛中制备的CuO催化剂，氮气气氛中制备的Cu2O/Cu双相催化剂在对硝基苯酚的还原中具有更高的催化活性。

Abstract:

Porous carbon supported Cu2O/Cu dual-phase catalysts were prepared via a combined solvothermal and sintering method, and their catalytic activities were investigated in catalytic nitrophenol reduction. XRD characterization indicated that the Cu2O/Cu phase can be obtained by sintering Cu-BTC under air atmosphere, whereas Cu phase can be gotten under nitrogen annealing atmosphere. The morphologies of catalysts Cu2O/Cu were checked using SEM and TEM. SEM and TEM images showed that Cu2O/Cu composite catalyst obtained in the nitrogen atmosphere has smaller particle size and higher dispersions than those of CuO catalyst obtained under air atmosphere. In the catalytic nitrophenol reduction, porous carbon supported Cu2O/Cu dual-phase catalysts obtained under nitrogen atmosphere exhibits much higher catalytic activity compared with CuO from air atmosphere.