Imprinted polymer/organo-smectite nanocomposites for paraoxon hydrolysis |
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| Affiliation: | 1. Anadolu University, Department of Chemistry, Eskişehir, Turkey;2. BİBAM (Plant, Drug and Scientific Researches Center), Anadolu University, Eskişehir, Turkey;3. Hacettepe University, Department of Chemistry, Ankara, Turkey;1. Key Laboratory of Environment Correlative Dietology (Ministry of Education), College of Food Science & Technology, Huazhong Agricultural University, Wuhan 430070, China;2. National Center of Quality Supervision and Inspection for Commodity, Yiwu, Zhejiang 322000, China;1. Key Laboratory of Fuel Cell Technology of Guangdong Province, Department of Chemistry, College of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China;2. State Key Laboratory of Organ Failure Research, National Clinical Research Center of Kidney Disease, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China;1. School of Materials Science and Engineering, Key Laboratory of Low-dimensional Materials and Application Technology (Ministry of Education), Xiangtan University, Xiangtan 411105, People’s Republic of China;2. University Research Facility in Materials Characterization and Device Fabrication, The Hong Kong Polytechnic University, Hong Kong;3. College of Physics and Information Science and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education, Hunan Normal University, Changsha 410081, Hunan, People’s Republic of China |
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| Abstract: | We have used the imprinting technique to create a polymer/organo-smectite nanocomposite catalyst. The aim was preparing a synthetic enzyme which shows high selectivity for paraoxon hydrolysis. Paraoxon imprinted polymer/organo-smectite composites (PIPO) and non-imprinted polymer/organo-smectite composites (NIPO) were prepared using methacryloylhistidine-Cu2+ (MAH-Cu(II)) and 2-methacryloyloxy)ethyl]dimethylhexadecylammonium bromide] (MOEDMAC16) modified smectite. These nanocomposites were applied as a catalyst in the hydrolysis of paraoxon which is an organophosphate ester and used as a pesticide. The catalytic activity of these composites was evaluated according to the enzyme kinetics model of Michaelis–Menten. PIPO showed better catalytic activity than NIPO. In addition, the paraoxon imprinted nanocomposite had greater catalytic activity (based on kcat/Km values) for paraoxon hydrolysis by a factor of 391 compared to that of parathion hydrolysis. |
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