三吡啶基Cu(Ⅱ)配合物的合成及其催化降解活性艳蓝KN-R的研究

Synthesis of tripyridyl Cu(Ⅱ)complexes and its catalytic degradation of reactive brilliant blue KN-R

以2吡啶甲酸乙酯和无水丙酮为原料,通过三步法合成有机配体三联吡啶(tpy-Cl),再将其与过渡金属盐CuCl2·2H2O配位得到三吡啶基Cu(Ⅱ)配合物,并以该配合物为催化剂应用于催化降解活性艳蓝KNR。通过1HNMR、FTIR以及XRD对三吡啶基Cu(Ⅱ)配合物的结构进行表征,利用TG对配合物中CuO含量进行分析以间接算出Cu的含量,利用EDS直接测定配合物中Cu的含量,同时探讨该配合物催化剂在活性艳蓝KNR降解中的催化性能;系统研究了催化剂用量、温度、pH、过氧化氢浓度以及循环使用次数对活性艳蓝KNR脱色效果的影响。结果表明:有机配体三联吡啶(tpy-Cl)与金属Cu(Ⅱ)可形成稳定的Cu配合物,并且Cu的含量达14%;该催化剂具有优异的催化脱色性能,室温下,55min脱色率可达到95%以上,在循环使用5次后仍可保持着较高的催化活性,在印染废水处理领域展现出良好的应用前景。

The organic ligand terpyridine(tpy-Cl)was synthesized with three-step approach by using ethyl 2-picolinate and acetone as the initial raw materials,and then coordinated with CuCl2·2 H2 O to obtain tripyridyl Cu(Ⅱ)complex.The complex was used as the catalyst to catalyze the degradation of reactive brilliant blue KN-R.The structure of tripyridyl Cu(Ⅱ)complex was well characterized by 1 H NMR,FTIR and XRD.CuO content in tripyridyl Cu(Ⅱ)complex was analyzed by TG to indirectly figure out the content of Cu.EDS was used to directly measure Cu content in the complex.Meanwhile,the catalytic performance of the catalyst in the degradation of reactive brilliant blue KN-R was also investigated.The effects of catalyst dosage,temperature,pH,the concentration of hydrogen peroxide and number of cycles on decoloration effect of reactive brilliant blue KN-R were studied in detail.The results showed that the terpyridine(tpy-Cl)and Cu(Ⅱ)could form stable complex,and Cu content reached 14%.The tripyridyl Cu(Ⅱ)complex had excellent decoloration property.The decoloration ratio in 55 min could reach more than 95% under room temperature,and the catalytic system still kept high catalytic activity after cyclic utilization for 5 times.Therefore,the tripyridyl Cu(Ⅱ)complex has good application prospect in wastewater treatment field.