Synthesis And Characters Of Molecularly Imprinted Polymers For Benzene、Aniline And Phenol

Benzene, aniline and phenol are toxic compounds, which results from industrialemissions, automobile exhaustion and so on. They therefore represent a potentialthreat to human health. With respect to toxic of benzene, aniline and phenoldeveloping a simple, robust and sensitive detecting method for these mateials hasbecome very important. Molecular imprinting technique has been proven to be apotential choice.Four chapters were included in this thesis. In chapter1, an overview of themolecular imprinting technique and molecularly imprinted polymers research in pastfew years was presented. Simultaneously, a review about the preparation methods andthe application in various fields was also mentioned in this part.In chapter2, benzene MIPs were synthesized and characterized. The benzeneMIPs were prepared by using the hybrid covalent/noncovalent approach and sol-geltechnology. The as-prepared MIPs were characterized and analyzed by scanningelectron microscopy (SEM), UV and IR spectroscopy. Experimental results showedthat the adsorption capacity (QMIP), distribution coefficient (KMIP) and identifyingfactor (α) of the benzene MIPs were526μg/g,660.71and20.54, respectively. Themaximum adsorption of benzene on the MIPs could be reached after25min. It wasconcluded that the as-prepared MIPs exhibited high selectivity and short response timeto benzene.In chapter3, fluorescence functionized aniline MIPs composites weresynthesized and characterized. The MIPs were prepared by doped fluorescent carbonquantum dots (CQDs) with aniline MIPs. The as-synthesized MIPs composites werecharacterized and analysized by fluorescence spectroscopy, transparent electronmicroscopy (TEM) and fluorescence microscopy. The interaction between aniline andthe as-synthesized MIPs composites was studied. Experimental results showed thatthe detection linear range for aniline was2.0×10-11—1.0×10-10mol/L and detectionlimit was2.0×10-11mol/L under optimum conditions. Additionally, the MIPscomposites had high selectivity in determining aniline.In chapter4, fluorescence functionized phenol MIPs composites weresynthesized and characterized. The MIPs were prepared by doped fluorescent carbon quantum dots (CQDs) with phenol MIPs. The as-synthesized MIPs composites werecharacterized and analysized by fluorescence spectroscopy, TEM and fluorescencemicroscopy. Experimental results showed that a wide linear detection range of phenol,i.e.5.0×10-11—1.0×10-7mol/L with satisfied selectivity could be obtained by usingthe new MIPs composites.