中文摘要：

采用两步法,采用水热法以Fe（NO_3）_3·9H_2O、Cu（NO_3）_2·5H_2O作为前驱体,水为溶剂,正丙醛为还原剂,制备了CuFeO_2微米颗粒.为进一步提高其催化活化H_2O2的性能,使用硼氢化钠对其进行了还原处理制备微米CuFe/CuFeO_2催化剂.利用XRD、SEM和XPS对其进行了物相,形貌和表面元素的表征,结果表明所制备的材料为Cu、Fe和CuFeO_2的微米级复合物.以罗丹明B（RhB）为目标污染物,评价了其Fenton催化性能.结果表明：在25℃,CuFe/CuFeO_2催化剂用量为0.5 g/L,H_2O2浓度为40 mmol/L,RhB浓度为10μmol/L,初始pH=5.0时,CuFe/CuFeO_2催化剂在30 min内可降解94.4%的RhB,表观速率常数是相同条件下未处理CuFeO_2的11.6倍.这说明CuFe和CuFeO_2复合可明显增强其催化活化H_2O2的能力.

英文摘要：

CuFe/CuFeO2 micro-composites were prepared via a two-step route. CuFeO2 microparticles were first prepared through a modified hydrothermal method with Fe （NO3）3· 9H2O and Cu（NO3）2· 5H2O as precursors in the presence of distilled water and propionaldehyde, and then CuFe/CuFeO2 micro-composites were obtained from the controllable reduction of the as-prepared CuFeO2 microparticles by NaBH4. The structure, morphology and surface element composition of CuFe/CuFeO2 micro-composites were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. It was found that as-prepared products were a microscaled composite of Cu, Fe and CuFeO2. The Fenton-like catalytic activity of CuFe/CuFeO2 micro-composites was evaluated via the degradation of rhodamine B （RhB） as a model pollutant. It was found that 94.4% RhB （10 μmol/L） can be degraded in 30 rain at initial pH 5.0 and concentration of 0.5 g/L CuFe/CuFeO2 and 40 mmol/L H2O2. The first-order reaction kinetic constant for the degradation of RhB by CuFe/CuFeO2 is 11.6 times that by CuFeO2. These results show that the H2O2-activating ability of CuFe/CuFeO2 significantly enhances by the composite of CuFe and CuFeO2.