以月桂酸为阴离子表面活性剂,3-胺丙基三乙氧基硅烷(APTES)为共结构导向剂,合成了高含量氨基功能化介孔氧化硅材料(AFMS)。以AFMS为吸附剂对溶液中酸性橙7(AO7)进行吸附,对影响AO7吸附效率的相关因素进行了详细研究,结果表明,溶液p H值及温度影响较大。吸附动力学表明,本研究中合成的AFMS对AO7的吸附速率极快。Sips吸附模型对吸附等温线模拟效果最好,从中可知AO7在样品D(由3.0 m L正硅酸乙酯及1.4 m L APTES合成)上的最大吸附量为1.26 mmol·g-1,远远高于相关文献报道的值。此外,通过吸-脱附循环实验证明,样品D具有良好的稳定性。
Ultrafine CeO2 were prepared by microwave-assisted heating process and high temperature calcination. The precursor(Ce2(CO3)3) was analyzed by TG-DSC, which revealed that the product was CeO2. The product was characterized by XRD, Laser Raman spectrum , field-emission scanning electron micrograph(FE-SEM), Atomic Force Micrograph(AFM), respectively. The results of XRD and Raman spectroscopy characterization show that the product has the cubic fluorite-like structure. FE-SEM exhibits that the grain size distribution of product prepared by high temperature calcination is wide and that the particle of product synthesized by microwave-assisted heating process is symmetrical. Optical glass was polished by CeO2 prepared by microwave-assisted heating and high temperature calcination respectively. AFM micrograph proves that the polishing effect of CeO2 prepared by microwave-assisted heating is better than that of CeO2 synthesized by high temperature calcination.
