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صفحه اصلی
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بیست و نهمین کنفرانس شیمی آلی ایران
Copper (II) complex immobilized on CuFe2O4-chitosan functionalized metformin for pollutants remediation
نویسندگان :
Shahla Abbasi ( دانشگاه علم و صنعت ایران ) , Zahra Nezafat ( دانشگاه علم و صنعت ایران ) , Shahrzad Javanshir ( دانشگاه علم و صنعت ایران ) , Behzad Aghabarari ( پژوهشگاه مواد و انرژی )
کلید واژه ها :
Reduction reactions،4Nitrophenoles،Methylene blue،Rhodamine B،Chitosan
چکیده مقاله :
Improved wastewater treatment is essential to ensure the health of humans and ecosystems. The urgency to invest in wastewater treatment has never been greater given the impact of water pollution on human health [1,2]. This work reports the synthesis of a green and efficient heterogeneous magnetic catalyst, based on chitosan as a natural support. For this purpose, we first synthesized chitosan-coated magnetic nanoparticles of CuFe2O4 (CuFe2O4-Ch), which was functionalized with 3-chloropropyltrimethoxysilane (TMOS) and then metformin. The CuFe2O4-Ch-Mtn-Cu(II) complex was finally prepared by the immobilization of copper ions. We characterized CuFe2O4-Ch-Mtn-Cu(II) by diverse analytical methods like FTIR, XRD, SEM, TEM, VSM, TGA/DTG, BET, EDS, and elemental mapping. The synthesized catalyst was applied for room temperature reduction of 4-nitrophenol (4-NP), methylene blue (MB), and rhodamine B (RhB), in the presence of NaBH4 (Scheme). The reaction times for reduction of the MB, RhB and 4-NP in the presence of 3 mg of CuFe2O4-Ch-Mtn-Cu(II) are 100 s, 11 and 9 min respectively. The reaction kinetics for the reduction of 4-NP and RhB were investigated and the obtained rate constant, k4-NP and kRhB were 0.919 and 0.563 min-1 respectively. The synthesized CuFe2O4-Ch-Mtn-Cu(II) can be reused for 3 times without significant loss of in performance.
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