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在室温碱性条件下合成了Mn掺杂的介孔氧化硅MCM-41材料,并利用XRD,FTIR,N2吸附,HREM等测试手段对其进行了表征.研究发现:随着Mn掺杂量的增加,XRD图谱中材料的特征衍射峰(100)强度逐渐减弱,比表面SBET值随之减小,表明Mn掺杂可以使介孔结构稳定性下降;红外光谱中968cm-1附近吸收峰的出现,表明Mn离子已进入Si—O骨架并引起Si—O—Mn键的振动;HREM的结果证实了介孔结构的存在,Mn的掺杂可造成有序介孔结构发生扭曲并趋向混乱.
Mn-doped mesoporous silica MCM-41 was synthesized under alkaline conditions at room temperature, and characterized by XRD, FTIR, N2 adsorption and HREM. The results show that the intensity of the characteristic diffraction peak (100) decreases and the specific surface area SBET decreases with the increase of Mn doping amount, which indicates that Mn doping can decrease the stability of mesoporous structure. The infrared The appearance of the absorption peak near 968 cm-1 in the spectrum indicates that Mn ions have entered the Si-O framework and cause vibration of Si-O-Mn bonds; the results of HREM confirm the existence of mesoporous structures, and the doping of Mn can cause an order Mesoporous structures distorted and tended to be disorganized.