Li Zehua, Wu Yi-nan, Li Jie, Zhang Yiming, Zou Xin, Li Fengting
College of Environmental Science and Engineering, State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092 (P.R. China).
Chemistry. 2015 Apr 27;21(18):6913-20. doi: 10.1002/chem.201406531. Epub 2015 Mar 10.
Three aluminum compounds, namely alumina, aluminum hydroxide, and boehmite, are probed as the metal sources for the hydrothermal synthesis of a typical metal-organic framework MIL-53(Al). The process exhibits enhanced synthetic efficiency without the generation of strongly acidic byproducts. The time-course monitoring of conversion from different aluminum sources into MIL-53(Al) is achieved by multiple characterization that reveals a similar but differentiated crystallinity, porosity, and morphology relative to typical MIL-53(Al) prepared from water-soluble aluminum salts. Moreover, the prepared MIL-53(Al) constructed with the three insoluble aluminum sources exhibit an improved thermal stability of up to nearly 600 °C and enhanced yields. Alumina and boehmite are more preferable than aluminum hydroxide in terms of product porosity, yield, and reaction time. The adsorption performances of a typical environmental endocrine disruptor, dimethyl phthalate, on the prepared MIL-53(Al) samples are also investigated. The improved structural stability of MIL-53(Al) prepared from these alternative aluminum sources enables double-enhanced adsorption performance (up to 206 mg g(-1)) relative to the conventionally obtained MIL-53(Al).
研究了三种铝化合物，即氧化铝、氢氧化铝和勃姆石，作为水热合成典型金属有机框架材料MIL-53(Al)的金属源。该过程提高了合成效率，且不产生强酸性副产物。通过多种表征手段实现了对不同铝源向MIL-53(Al)转化的时间进程监测，结果表明，相对于由水溶性铝盐制备的典型MIL-53(Al)，其结晶度、孔隙率和形态相似但存在差异。此外，用这三种不溶性铝源构建的MIL-53(Al)热稳定性提高，可达近600°C，产率也有所提高。在产品孔隙率、产率和反应时间方面，氧化铝和勃姆石比氢氧化铝更具优势。还研究了典型环境内分泌干扰物邻苯二甲酸二甲酯在制备的MIL-53(Al)样品上的吸附性能。相对于传统方法制备的MIL-53(Al)，由这些替代铝源制备的MIL-53(Al)结构稳定性提高，吸附性能得到双重增强（高达206 mg g(-1)）。
