【摘要】 合成了具有大的比表面积和结构容易修饰的金属有机框架材料(MOFs)光催化剂:MIL-101(Cr)和MIL-101(Cr)-2OH。利用红外、X射线粉末衍射、X射线光电子能谱等仪器对MIL-101(Cr)和MIL-101(Cr)-2OH光催化剂的结构进行表征分析。通过紫外-可见光漫反射光谱、ζ电位、电喷雾电离质谱系统地分析研究MOFs中不参与配位的给电子基团对光催化降解亚甲基蓝性能的影响。研究发现MIL-101(Cr)-2OH中桥联配体2,5-二羟基对苯二甲酸上不参与配位的2个羟基,可以通过配体-金属的电荷转移作用影响光的吸收,从而调控光催化降解速率更多还原

【Abstract】 In this work, metal organic framework materials(MOFs) photocatalysts with large specific surface area and easy structure modification are synthesized: MIL-101(Cr) and MIL-101(Cr)-2OH. The structures of MIL-101(Cr)and MIL-101(Cr)-2OH photocatalysts were characterized by FT-IR, X-ray powder diffraction(PXRD), and X-ray photoelectron spectroscopy(XPS). The UV-visible diffuse reflectance spectroscopy(UV-Vis DRS), ζ potential, and electrospray ionization mass spectrometry(ESI-MS) were used to systematically analyze the effect of electron donating groups in the MOFs on photocatalytic degradation of methylene blue(MB). It was found that the two hydroxyl groups that do not participate in MIL-101(Cr)-2OH can affect the absorption of light through the action of ligandmetal charge transfer(LMCT), thereby regulating the photocatalytic degradation rate.更多还原