金属有机骨架UiO-66具有良好的化学和热稳定性。为提高其氢气吸附能力，探究其在氢气储存领域中的应用，采用溶剂热法合成高纯度UiO-66，并以不同摩尔比的对苯二甲酸和2-氨基对苯二甲酸合成NH₂-UiO-66材料，分别对UiO-66和混合配体合成的NH₂-UiO-66进行X射线衍射、热重分析、N₂物理吸附、扫描电镜和氢气吸附性能等分析和表征，结果表明，NH₂-UiO-66的结晶度随着2-氨基对苯二甲酸的加入先逐渐变强，后又渐渐变弱。氢气吸附性能也随着2-氨基对苯二甲酸的加入呈现相同的特点，其中，对苯二甲酸与2-氨基对苯二甲酸的摩尔比为3∶2时，所合成的NH₂-UiO-66的氢气吸附性能最佳，比单配体合成的UiO-66提高33%，具有良好的应用前景。

Metal organic framework UiO-66 has high chemical and thermal stabilities.In order to improve its adsorption capacity to hydrogen and explore its application in the field of hydrogen storage sector,a highly pure UiO-66 is synthesized by solvothermal method,and NH₂-UiO-66 materials are synthesized through using pure UiO-66 to react with different ratios of 2-aminioterephthalic acid and terephthalic acid.The synthesized UiO-66 and NH₂-UiO-66 are all characterized by X-ray diffraction,thermogravimetric analysis,nitrogen adsorption,scanning electron microscopy and hydrogen adsorption.It is found that with the addition of 2-amino terephthalic acid,NH₂-UiO-66 absorbents' crystallinity and adsorption to hydrogen both strengthen gradually and weaken then.When the ratio between terephthalic acid and 2-aminoterephthalic is 3:2,the synthesized NH₂-UiO-66 absorbent has the best adsorption performance to hydrogen,which is 33% higher than that of UiO-66 synthesized by a single ligand.

张雯(1993-),女,硕士研究生,研究方向为MOF材料及氢气吸附技术研究,dlutzhangwen@163.com