Zhang Yaping, Gao Di, He Yufeng, Li Bozhen, Song Pengfei, Wang Rongmin
Key Laboratory of Eco-functional Polymer Materials of Ministry of Education, Institute of Polymer, College of Chemistry & Chemical Engineering, Northwest Normal University, Lanzhou 730070, China E-mail:
Water Sci Technol. 2021 Mar;83(5):1118-1129. doi: 10.2166/wst.2021.055.
The attapulgite (APT), a typical nano-rod structured clay was introduced to MIL-101(Fe), a typical eco-friendly iron-based Metal-Organic Framework material (MOF), during the preparation by a one-step solvothermal method, which afforded a novel APT and MOF hybrid (APT@MIL). Based on the characterization of SEM, FT-IR and XRD, it was found that the rod-like crystals of APT determined the size of MIL-101(Fe) while maintaining its regular octahedral crystal form, and the crystal size of MIL-101(Fe) in APT@MIL enlarged 4 times. It was also discovered that the rod-like APT were evenly distributed in MIL-101(Fe) crystals. Using APT@MIL as the photocatalyst, some organic dyes were photodegraded in simulated sunlight. The analysis indicated that APT@MIL has high adsorption and photodegradation activity, the removal rate of methylene blue was up to 99.5%. Finally, the photocatalytic activity of APT@MIL was verified by UV-Vis DRS, photoluminescence spectra. The thermodynamic adsorption, kinetic characteristics adsorption, and removal mechanism of APT@MIL are also discussed. In summary, a novel hybrid material APT@MIL was successfully prepared with good adsorption and photocatalytic performance. It is expected to be used in photocatalytic degradation of dye wastewater.
通过一步溶剂热法制备典型的环保型铁基金属有机骨架材料（MOF）MIL-101(Fe)时，将典型的纳米棒结构粘土凹凸棒石（APT）引入其中，从而得到一种新型的APT与MOF的杂化材料（APT@MIL）。基于扫描电子显微镜（SEM）、傅里叶变换红外光谱（FT-IR）和X射线衍射（XRD）表征发现，APT的棒状晶体决定了MIL-101(Fe)的尺寸，同时保持其规则的八面体晶体形态，且APT@MIL中MIL-101(Fe)的晶体尺寸增大了4倍。还发现棒状的APT均匀分布在MIL-101(Fe)晶体中。以APT@MIL作为光催化剂，一些有机染料在模拟太阳光下被光降解。分析表明，APT@MIL具有较高的吸附和光降解活性，亚甲基蓝的去除率高达99.5%。最后，通过紫外可见漫反射光谱（UV-Vis DRS）、光致发光光谱对APT@MIL的光催化活性进行了验证。还讨论了APT@MIL的热力学吸附、动力学吸附特性及去除机理。综上所述，成功制备了一种具有良好吸附和光催化性能的新型杂化材料APT@MIL。有望将其用于染料废水的光催化降解。
