BAO Bin, GU Aotian, CHEN Jiuyu, YANG Yi
（School of Environmental and Biological Engineering， Nanjing University of Science and Technology， Nanjing 210094， China）
Abstract: In order to change the functional activity of Cu-based metal-organic framework Cu-BTC and improve its ability to adsorb iodide ions, controllable pyrolysis was carried out to prepare MOF-derived materials with suitable pore channels and hydrophobic properties, which were impregnated and loaded with nano-Ag before pyrolysising, then the Ag@CuO composites were prepared and adsorption isotherm experiments were performed simultaneously. The results show that the maximum adsorption capacity of Cu-Cu2O derived materials prepared by pyrolysis of Cu-BTC is 95.8 mg/g under nitrogen at 343 ℃. After the introduction of nano-Ag, Ag@CuO with a mass fraction of 10% has good adsorption effect, and the maximum adsorption capacity of the composite reaches 205.0 mg/g. Cu-Cu2O is close to the adsorption equilibrium at 120 min, and Ag@CuO can reach 50% of the equilibrium adsorption capacity at 15 min and is close to the adsorption equilibrium at 90 min. Through controllable heat treatment and introduction of nano-Ag, under the action of Ag and Cu dual active sites with iodide ions, Ag@CuO can increase the removal rate of iodide ions by 25% and the removal efficiency by 114.0%.
Keywords: metal-organic framework; Ag modification; adsorption efficiency; adsorption rate
中图分类号：TU7 文献标志码：A
收稿日期： 2022-04-17， 修回日期：2022-07-18,在线出版时间：2022-11-01。
基金项目：国家自然科学基金项目，编号：11805101、 51908240；江苏省自然科学基金项目，编号：BK20181064。
第一作者简介：鲍斌（1997—），男，硕士研究生，研究方向为环境功能材料。E-mail: 3258409433@qq.com。
文章编号：1008-5548（2022）06-0021-10
DOI:10.13732/j.issn.1008-5548.2022.06.003
