论文部分内容阅读
以水热法合成出的Mg-Al类水滑石为载体,用Ce(NO3)3·6H2O和HMT作原料,水热合成出LDO/CeO2纳米复合材料,并采用傅里叶变换红外光谱(FT-IR)、X射线衍射仪(XRD)和冷场发射扫描电子显微镜(FE-SEM)对样品结构和形貌进行了表征。此外,以H2O2为氧化剂,研究了该复合材料对罗丹明B模拟废水的催化氧化性能,结果表明,相同条件下制备出的LDO/CeO2纳米复合材料比纯CeO2具有更高的催化活性;当CeO2的负载量为50%,LDO/CeO2的投加量为0.2g时,罗丹明B模拟废水的降解接近完全,且催化剂重复使用5次后,脱色率仍保持85%以上。
Hydrothermal synthesis of Mg-Al hydrotalcite as carrier, Ce (NO3) 3 · 6H2O and HMT as raw materials, hydrothermal synthesis of LDO / CeO2 nanocomposites, and Fourier transform infrared spectroscopy (FT -IR), X-ray diffraction (XRD) and cold field emission scanning electron microscopy (FE-SEM) were used to characterize the structure and morphology of the samples. In addition, the catalytic oxidation of Rhodamine B simulated wastewater with H2O2 as oxidant was studied. The results show that the LDO / CeO2 nanocomposites prepared under the same conditions have higher catalytic activity than pure CeO2. When CeO2 The loading of LDO / CeO2 is 0.2g, the degradation of Rhodamine B simulated wastewater is nearly complete, and the decolorization rate of the simulated wastewater is still over 85% after the catalyst is reused for 5 times.