Synthesis of silver-loaded Zn-MOFs materials and their application in the photodegradation of organic dyes
ZHANG Yi
XIANG Ji
DONG Huaze
XIE Dong
YUAN Xinsong
WANG Fangkuo
DENG Chonghai
Abstract：In this study,a porous metal-organic framework {(CH3)2H2N+[Zn(btc)]·(H2O)(DMA)}n(Zn-MOFs)was synthesized via a solvothermal method using zinc nitrate and 1,3,5-benzenetricarboxylic acid(H3btc)as precursors.Subsequently,the as-synthesized Zn-MOFs were immersed in a 0.01 mol/L silver nitrate solution,magnetically stirred for 6 hours to achieve homogeneous impregnation,and then allowed to stand for phase separation.The resulting product was centrifuged,thoroughly washed,and dried under vacuum to obtain the Ag-loaded Zn-MOFs material.The synthesized materials were systematically characterized by XRD,SEM,TEM,and EDS to investigate their compositional,structural,and morphological properties.These analyses revealed a well-defined rod-like morphology with longitudinal dimensions exceeding 10 μm.The photocatalytic degradation performance of Ag-loaded Zn-MOFs toward Methyl Orange,Methylene Blue,and Congo Red was systematically investigated.A comparative analysis with pristine Zn-MOFs revealed that the Ag-functionalized material demonstrated a remarkable enhancement factor exceeding 30-fold in photodegradation efficiency under identical experimental conditions.The Ag-loaded Zn-MOFs exhibited exceptional stability during three consecutive cycling experiments,with negligible variation in their photocatalytic degradation performance.Notably,the material achieved over 95％photodegradation efficiency for Congo Red and Methylene Blue within 15 minutes under optimized conditions.These findings collectively demonstrate that Ag-impregnated MOFs exhibit superior photocatalytic performance in the degradation of azo dye-containing wastewater.The significant enhancement in degradation efficiency underscores the pivotal role of Ag functionalization in optimizing MOFs' catalytic activity,thereby providing a robust theoretical framework for advancing functional modifications of porous MOFs and guiding their practical implementation in industrial wastewater remediation.
Keywords：metal-organic frameworksilver-loadedphotocatalytic degradationorganic dye
Publication Date：2025-06-15
Online Publishing Date：2025-09-09(First online date of this platform, not the publication date of the document)
Pages：10( 104-113 )