以九水硝酸铬、对苯二甲酸、氢氟酸为前体,采用水热法制备了MIL-101光催化剂.运用X射线衍射(XRD)、紫外-可见光吸收光谱(UV-vis)、傅里叶红外光谱(FTIR)、BET比表面积分析仪、扫描电镜(SEM)及透射电镜(TEM)等方法表征材料的形貌结构.考察了 MIL-101(Cr)光催化剂对 Cr(Ⅵ)-RhB 水体复合污染的定向分离以及光催化处理性能,并对其协同处理机制进行了探讨.结果表明:相较于单一Cr(Ⅵ)和RhB污染,该光催化剂在紫外光下表现出对Cr(Ⅵ)-RhB水体复合污染更高的处理效率.而且由于MIL-101的本身结构的特性,使得分子直径不同的两种目标污染物Cr(Ⅵ)和RhB能够自主定向分离,并且同步发生氧化还原反应.%The MIL-101 photocatalysts were prepared by solvothermal synthesis method using chromic nitrate nonahydrate, terephthalic acid and hydrofluoric acid as precursors. The structures of the samples were characterized by X-ray diffraction (XRD), ultraviolet-visible spectroscopy (UV-vis), fourier transform-infrared (FTIR), Brunauer-Emmett-Teller (BET), scanning electron microscope (SEM) and transmission electron microscope (TEM) measurements. The orientationasl separation and photocatalytic reaction of Cr(Ⅵ) and RhB in Cr(Ⅵ)-RhB combined pollution on MIL-101(Cr) were investigated. Furthermore, the synergetic treatment mechanism for the combined pollution was discussed. The results demonstrated that this photocatalyst exhibited higher treatment efficiency for Cr(Ⅵ)-RhB combined pollution than for single Cr(Ⅵ) or RhB under ultraviolet light irradiation. Meanwhile, because of the structure of MIL-101, the target pollutants of Cr(Ⅵ) and RhB with different molecular diameters can be directionally separated, and the oxidation of RhB was synchronized with the reduction of Cr(Ⅵ).
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