| 维铜基配位聚合物的合成、结构和离子对其吸附Cr(Ⅵ)的影响 | |
| Two-Dimensional Copper-Based Coordination Polymer: Synthesis, Structure and Ion Effect on Adsorption of Cr(Ⅵ) | |
| 摘要: 配位聚合物通常具有较大的比表面积和结构容易调控的特点，能有效地吸附去除水中的Cr(Ⅵ)。以4，4'-联吡啶（bipy）、1，3-间苯二乙腈（1，3-dab）、Cu （ClO4）2·6H2O为原料，通过水热合成的方法成功合成了二维铜基配位聚合物：{[Cu （bipy）4（1，3-dab）][Cu （bipy）2（ClO4）2]（ClO4）2·（1，3-dab）}n （1）。利用红外、X射线单晶衍射、元素分析、X射线光电子能谱等表征方法对1的结构进行测试分析。结果表明，1属于正交晶系P2221空间群，a=1.115 52（5） nm，b=1.116 66（4） nm，c=3.116 84（15） nm，V=3.882 5（3） nm3。吸附Cr(Ⅵ)的性能研究表明，吸附剂1的最佳投料浓度为0.04 g·L-1；在pH=3~9的范围内均具有较好的吸附性能和pH适应性，并且在pH=5时吸附性能最好，吸附容量能达到250 mg·g-1。离子共存实验表明离子浓度越大、价态越高，它们对1吸附Cr(Ⅵ)的影响就越明显，并且阴离子的抑制作用高于金属阳离子，作用大小顺序： PO43->SO42->CO32->Cl->HCO3->NO3-。 | |
| 关键词: 配位聚合物 合成 结构 Cr(Ⅵ) 吸附 | |
| 基金项目: 广西自然科学基金（No.2019GXNSFBA245063）、梧州学院校级科研项目（博士基金项目）（No.2020A001）、梧州学院人才引进科研启动基金（No.WZUQDJJ21081）、梧州市科技项目（No.202002005）、国家级大学生创新创业训练计划项目（No.202111354154）和广西壮族自治区级大学生创新创业训练计划项目（No.S202111354119、S202111354135）资助。 | |
| Abstract: Coordination polymers usually have the characteristics of large specific surface area and easy control of structure, which can effectively adsorb and remove Cr(Ⅵ) in water. A copper-based coordination polymer:{[Cu(bipy)4 (1, 3-dab)] [Cu(bipy)2(ClO4)2] (ClO4)2· (1, 3-dab)}n (1), was successfully synthesized by the hydrothermal synthesis method using 4,4'-bipyridine (bipy), 1,3-isophthalonitrile (1,3-dab), Cu(ClO4)2·6H2O as raw materials. The structure of 1 was characterized by IR, X-ray single-crystal diffraction, elemental analysis, and X-ray photoelectron spectroscopy. The results show that 1 belongs to the orthorhombic crystal system, P2221 space group, a=1.115 52(5) nm, b=1.116 66(4) nm, c=3.116 84(15) nm, V=3.882 5(3) nm3. The performance study of adsorbing Cr(Ⅵ) showed that the optimal dosage of adsorbent 1 was 0.04 g·L-1. It had good adsorption performance and pH adaptability in a pH range of 1-9. The adsorption performance was the best when pH=5, and the adsorption capacity could achieve 250 mg·g-1. The ion coexistence experiments showed that the greater the ion concentration and the higher the valence, the more obvious their effect on the adsorption of Cr (Ⅵ) by 1, and the inhibition of anion was higher than that of metal cations, followed the order of PO43- > SO42- > CO32- > Cl- > HCO3- > NO3-. | |
| Keywords: coordination polymers synthesis structure Cr(Ⅵ) adsorption | |
| 投稿时间：2021-10-09 修订日期：2022-02-18 | |
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| 李石雄,冯安琪,胡媛,梁桂春,卢丽妃,卢慧萍.维铜基配位聚合物的合成、结构和离子对其吸附Cr(Ⅵ)的影响[J].无机化学学报,2022,38(5):941-950. | |
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