热解Cu-BTC衍生制备Ag@CuO复合材料  

Preparation of Ag@CuO composites by pyrolytically derivatization of Cu-BTC

作　　者：鲍斌 顾傲天 陈九玉 杨毅[1] BAO Bin;GU Aotian;CHEN Jiuyu;YANG Yi(School of Environmental and Biological Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学环境与生物工程学院,江苏南京210094

出　　处：《中国粉体技术》2022年第6期21-30,共10页China Powder Science and Technology

基　　金：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。

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-Cu_(2)O,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-Cu_(2)O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-Cu_(2)O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%。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-Cu_(2)O 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-Cu_(2)O 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%.

关 键 词：金属有机骨架 Ag改性 吸附效率 吸附速率 

分 类 号：TU7[建筑科学—建筑技术科学]