鲍 斌， 顾傲天， 陈九玉， 杨 毅
（南京理工大学环境与生物工程学院， 江苏南京210094）
DOI:10.13732/j.issn.1008-5548.2022.06.003
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。
摘要：为了改变铜基金属有机骨架Cu-BTC的功能活性，提高吸附碘离子的能力，对其进行可控热解，制备出具有合适孔道和疏水性能的MOF衍生材料Cu-Cu2O,随后浸渍负载纳米Ag,并进一步热解，制备Ag@CuO复合材料，同时进行吸附实验。结果表明：在温度为343℃的氮气条件下，热解Cu-BTC制备的Cu-Cu2O衍生材料，最大吸附量为95.8 mg/g;在引入纳米Ag后，质量分数为10%的Ag@CuO复合材料最大吸附量达到205.0 mg/g; Cu-Cu2O在120 min时接近于吸附平衡，Ag@CuO在15 min能达到平衡吸附量的50%,在90 min时接近于吸附平衡。通过可控热处理和引入纳米Ag,在Ag、Cu双活性位点和碘离子作用下，Ag@CuO复合材料对碘离子的去除速率增加25.0%,去除效率提高114.0%。
关键词：金属有机骨架；Ag改性；吸附效率；吸附速率
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
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