以三聚氯氰和对苯二胺为单体,利用三聚氯氰中3个氯原子的分级亲核取代反应得到含氮多孔有机聚合物(Cy-PA POP)。通过傅里叶变换红外光谱(FT-IR)、X射线粉末衍射(XRD)、扫描电镜(SEM)、热重(TG)及氮气吸附-脱附等手段表征其结构。以染料废水中典型的偶氮染料刚果红为去除对象,研究Cy-PA POP对其的吸附行为,并探讨了吸附机制。结果表明:当吸附剂用量为10mg,刚果红溶液初始浓度为100mg/L时,完全吸附时间为20min,Cy-PA POP对刚果红表现出超快地特异性吸附,最大吸附容量可达441.22mg/g。Cy-PA POP对水中刚果红的吸附动力学符合准二级动力学方程,吸附等温线符合Langmuir模型,且吸附热力学表明吸附行为是自发的过程。
Using cyanuric chloride and p-phenylenediamine as monomers,nitrogen-containing porous organic polymer (Cy-PA POP) was prepared by the stepwise nucleophilic substitution reaction of cyanuric chloride.The structure of polymer was characterized by Fourier transform infrared spectroscopy (FT-IR),X-ray powder diffraction (XRD),scanning electron microscopy (SEM),thermogravimetric analysis (TG) and nitrogen adsorption-desorption.The adsorption behavior and mechanism of Cy-PA POP for Congo red (CR),a typical azo dye in dye wastewater,were studied.The results showed that Cy-PA POP exhibited ultrafast specific adsorption to Congo red.When the adsorbent amount was 10 mg and the initial concentration of Congo red solution was 100 mg/L,the complete adsorption time was 20min and the maximum adsorption capacity reached 441.22mg/g.The adsorption kinetics of Cy-PA POP for Congo red in water conformed to the pseudo-second-order model and the adsorption isotherm agreed well with the Langmuir model.The adsorption thermodynamics indicated that the adsorption process was spontaneous process.
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基金资助
陕西省自然科学基础研究计划青年项目(2012JQ2022);陕西省教育厅自然科学一般专项科学研究计划(20JK0654)
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