Fluorescence Detection And Adsorption For Pollutants Over 2-aminoterephthalic Acid And Its Metal-Organic Frameworks Derivatives

Environment pollution is the research focus for scientists in the world and the detection and removal of pollutants in water is the main research topic of environmental science.Taking organic ligand 2-aminoterephthalic acid?ATA?as building unit,metal-organic frameworks were built by chelating with different metal ions and the studies on the fluorescence detection and adsorption of pollutants were also carried out.The main research contents are as follows:?1?Detecting Fe³⁺over ATA as fluorescent sensorIn Chapter 2,2-aminoterephthalic acid was used as fluorescent sensor to detect Fe³⁺for the first time.The results showed that the simple organic matter had good detecting selectivity and sensitivity to Fe³⁺in aqueous solution.It had good detecting linear within the concentration of 0-120?M and the the detecting limit was 5?M.This experiment provides a simple method to detect Fe³⁺in water.?2?Detecting 2,4,6-trinitrophenol?TNP?based on metal-organic frameworks fluorescent sensor constructed from ATAIn Chapter 3,2-aminoterephthalic acid and Zn?NO₃?₂·7H₂O were used as raw materials to fabricate a three-dimensional sheet discrete structure NH₂-MIL-101?Zn?through a simple reflux method.As a fluorescent sensor to detect TNP,it had good detecting selectivity and sensitivity,as well as a good detecting linear within the concentration of 0-29?M.In Chapter 4,ATA and AgNO₃ were used as raw materials to build a novel rod shape NH₂-MIL-101?Ag?through a simple reflux method.As fluorescent sensor to detect TNP,it had good detecting selectivity and sensitivity,as well as good detecting linear within the concentration of 0-22?M.In Chapter 5,a novel composites constructed from MOFs and nano-Ag particles,Ag@NH₂-MIL-101?Ag?,have been fabricated through ATA and AgNO₃ as raw materials and with the participation of N,N-dimethylformamide?DMF?.During the reaction for the composites,part of Ag⁺reduced and formed nanometer Ag in reducing solution of DMF and loaded on NH₂-MIL-101?Ag?.As fluorescent sensor to detect TNP,it had good detecting selectivity and sensitivity,as well as better detecting linear within the concentration of 0-29?M while the detecting limit was 0.5?M.?3?Adsorbing TNP over metal-organic frameworks based on ATAIn Chapter 6,Fe?NO₃?₃·9H₂O and ATA were used as raw materials to prepare a hexagon NH₂-MIL-101?Fe?through a simple reflux method.As a kind of adsorbent,it had good adsorption capacity for TNP,with the maximum adsorption capacity of101.79 mg/g.The detail studies on dynamics,thermodynamics and adsorption isothermal equation were also made in this paper.