锆-金属有机骨架对印染废水中Cr(Ⅵ)的高效检测

LI Qing,CHEN Linghui,LI Dan,WU Zhiqiang,FAN Zenglu

Journal of Xi'an Polytechnic University（2022）

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Abstract

针对印染废水中剧毒重金属铬Cr(Ⅵ)离子难以被有效检测的问题,采用溶剂热法将氯化锆(ZrCl4)与2,2'-联吡啶-5,5'-二甲酸(H2 L)反应,合成了荧光发射型锆-金属有机骨架(Zr-MOF).粉末X射线衍射表征证明了Zr-MOF的高水稳定性,荧光光谱测试证实了Zr-MOF的光致发光性能.将合成的Zr-MOF用于对Cr(Ⅵ)离子进行荧光淬灭识别和检测,结果表明:Zr-MOF对Cr2 O2-7和CrO2-4的检出限(摩尔比)分别为2.15×10-9和2.33×10-9,可抵御多种混合阴离子的干扰.提出了Cr(Ⅵ)离子引起Zr-MOF荧光淬灭响应的机制.

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