【摘要】 由于MOFs材料在潮湿环境下表现出较低的CO₂吸附性能和稳定性能。采用化学修饰法将多壁碳纳米管（MWCNTs）羧基化,采用溶剂热法合成多壁碳纳米管/Mg-MOF-74复合材料（CNT@Mg-MOF-74）,使用粉末X射线衍射、傅里叶变换红外光谱、热重分析、扫描电镜、氮气物理吸附等表征手段考察材料的结构和形貌。考察了MWCNTs,Mg-MOF-74,CNT@Mg-MOF-74在25℃、常压下对CO₂的吸附效果,CNT@Mg-MOF-74的循环再生性能以及Mg-MOF-74和CNT@Mg-MOF-74在潮湿环境下（温度28℃,相对湿度72%）的结构稳定性。结果表明,MWCNTs的掺杂并不影响Mg-MOF-74的结构和形貌。CNT@Mg-MOF-74相比Mg-MOF-74具有更好的疏水能力。CNT@MgMOF-74在25℃、常压下对CO₂的饱和吸附量可达79.88 mg/g,相比Mg-MOF-74吸附量（CO₂饱和吸附量为59.75mg/g）增加了34%,5次循环再生率均为100%,而且CNT@Mg-MOF-74相比Mg-MOF-74在潮湿环境下具有更好的结构稳定性。更多还原

【Abstract】 Limit applications have been existed because hygroscopic property of MOFs,and atmosphericmoisture also causes MOFs instability and low gases adsorption capacity.In order to overcome these problems,acid-functionalized multiwalled carbon nanotubes（MWCNTs） incorporated Mg-MOF-74 composite（CNT@Mg-MOF-74） has been successfully synthesized and characterized by XRD,FT-IR,TGA,SEM and BET analysis.Meanwhile,the performance of Mg-MOF-74,MWCNTs and CNT@Mg-MOF-74 in CO₂ adsorption were investigated under 25℃ and ambient pressure.Tested regenerationperformance of CNT@Mg-MOF-74 and the moisture stability of Mg-MOF-74 and CNT@Mg-MOF-74 in moisture environment（at 33% relative humidity and 23°C）.The result indicating that CNT@Mg-MOF-74 obtained has the same crystal structure as that of virgin Mg-MOF-74,and has the same morphology both of the virgin Mg-MOF-74 and MWCNTs,but exhibited a much greater CO₂ adsorptioncapacity（increased from 59.75 to 79.88 mg/g,about a 34% increase in CO₂ storage capacity at 25℃ and ambient pressure）,and an improved stability in moist conditions.The regeneration rate can maintain 100% in 5 repeat cycles.更多还原