基于发光NH_(2)-MIL-53(Al)吸附剂实现水体中Cu^(2+)的检测去除一体化

Integrated detection and removal of Cu^(2+)in water based on iuminescent NH_(2)-MIL-53(Al)adsorbent

通过溶剂热法制备了一种配体发光型金属-有机框架材料NH_(2)-MIL-53(Al),用于同时检测和去除水体中的Cu^(2+).表征结果证实NH_(2)-MIL-53(Al)呈均匀的六面体形貌,平均尺寸约为600 nm.得益于材料表面丰富的氨基,NH_(2)-MIL-53(Al)展现出优异的Cu^(2+)去除能力,具有去除速率快(60 min)、吸附量大(324.87 mg·g^(-1))、抗干扰能力强和环境适用性强等特点.荧光滴定实验结果表明,NH_(2)-MIL-53(Al)的初始荧光相对较强,且其NH_(2)-BDC配体荧光特性稳定,能实现对水体中Cu^(2+)的高灵敏检测,具有检测限低(0.158μmol·L^(-1))、线性范围广(0~100μmol·L^(-1))及抗干扰能力强等优势.综上所述,制备的NH_(2)-MIL-53(Al)实现了对水体中Cu^(2+)的高效检测和去除,并展现出优异的理化稳定性,有望用于Cu^(2+)污染的水域治理.

NH_(2)-MIL-53(Al),as one of the classic ligand-emitting metal-organic frameworks(MOFs),was prepared by a solvothermal method for the simultaneous detection and removal of Cu^(2+)from water.Various characterisation results confirmed that the as-prepared NH_(2)-MIL-53(Al)possesses a homogeneous hexahedral morphology with an average size of approximately 600 nm.Benefiting from the abundant amino groups on the surface,NH_(2)-MIL-53(Al)exhibits excellent Cu^(2+)removal ability with a fast removal rate(60 min),a large adsorption capacity(324.87 mg·g^(-1))and strong antiinterference ability.Furthermore,the results of the fluorescence titration experiments show that the initial fluorescence of NH_(2)-MIL-53(Al)was relatively strong,allowing for highly sensitive detection of Cu^(2+)with the strong and stable fluorescence properties of the NH_(2)-BDC ligand,accompanied by a low detection limit(0.158μmol·L^(-1)),a wide linear range(0~100μmol·L^(-1)),and strong anti-interference ability.In summary,NH_(2)-MIL-53(Al)achieved efficient detection and removal of Cu^(2+)from water and exhibited excellent physicochemical stability,making it a promising candidate for the treatment of Cu^(2+)polluted waters.