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Study on synthesis and adsorption properties of ReO 4 − ion imprinted polymer
Journal of Polymer Research ( IF 2.6 ) Pub Date : 2020-07-06 , DOI: 10.1007/s10965-020-02172-8
Xiaoyan Zhang , Weiwei Jia , Donghao Li , Chunli Liu , Runtian Wang , Ke Li , Hui Li , Zhenbin Chen , Yuan Sun , Juan M. Ruso , Dongdong Hu , Zhen Liu

Water solution polymerization was adopted to prepare perrhenate ion imprinted polymers in this work, and preparation conditions, such as molar ratio of acrylic acid, N,N - methylene double acrylamide, hydrogen peroxide and ascorbic acid to N-vinyl pyrrolidone, polymerization time and temperature on adsorption separation property were investigated and optimized using adsorption quantities and separation degree as indexes. To enhance the adsorption selectivity, adsorption properties of samples prepared under different conditions were conducted in a mixture aqueous solution of ammonium perrhenate and potassium permanganate with the molar ratio of 1:1. Results showed that as the molar ratio of N,N - methylene double acrylamide, acrylic acid, hydrogen peroxide, ascorbic acid to N-vinyl pyrrolidone were 2.0, 1.9, 0.03, and 0.003 respectively, the reaction temperature and time were 35 °C and 24 h, adsorption quantities and separation degree arrived at 0.037 mmol/g and 2.31, respectively, while the adsorption capacities and separation degree of non-imprinted polymers were only 0.009 mmol/g and 0.22. Besides, study was also discovered that the prepared samples presented an exciting reusable stability. Based on samples prepared under optimal conditions, the structure was characterized by Fourier transform infrared spectroscopy, scanning electron microscope, transmission electron microscope, BET surface area and thermogravimetric analysis using non-imprinted polymer prepared under the same conditions as a control. Finally, the adsorption thermodynamics and kinetics were studied, and the kinetics documented that the adsorption of perrhenate ion imprinted polymers was a zero-order model process. The thermodynamics presented the adsorption was more suitable to be expressed by Langmuir model, and Scatchard analysis revealed that heterogeneous binding sites were formed in IIP.



中文翻译:

ReO 4-离子印迹聚合物的合成及吸附性能研究

本工作采用水溶液聚合法制备高r酸根离子印迹聚合物,制备条件为丙烯酸,N,N-亚甲基双丙烯酰胺,过氧化氢和抗坏血酸与N-乙烯基吡咯烷酮的摩尔比,聚合时间和温度。以吸附量和分离度为指标对吸附分离性能进行了研究和优化。为了提高吸附选择性,在高锰酸铵和高锰酸钾的摩尔比为1:1的混合水溶液中进行了在不同条件下制备的样品的吸附性能。结果表明,当N,N-亚甲基双丙烯酰胺的摩尔比为丙烯酸,过氧化氢,抗坏血酸与N-乙烯基吡咯烷酮的比分别为2.0、1.9、0.03和0.003时,--印迹聚合物仅为0.009 mmol / g和0.22。此外,研究还发现所制备的样品具有令人兴奋的可重复使用的稳定性。基于在最佳条件下制备的样品,通过傅里叶变换红外光谱,扫描电子显微镜,透射电子显微镜,BET表面积和热重分析(使用在与对照相同的条件下制备的非压印聚合物)对结构进行了表征。最后,对吸附热力学和动力学进行了研究,动力学表明,高r酸盐离子印迹聚合物的吸附是零级模型过程。热力学表明吸附更适合用朗缪尔模型表达,Scatchard分析表明在IIP中形成了异质结合位点。

更新日期:2020-07-06
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