摘要
针对印染废水中重金属铬Cr(Ⅵ)离子造成的污染,采用氯化锆与2,2’-联喹啉-4,4’-二甲酸(H2L)反应,合成了Zr-金属有机骨架(Zr-MOF)。经粉末X射线衍射表征证实Zr-MOF在水中和强酸/碱环境中具有结构稳定性。经荧光测试证明Zr-MOF的光致发光性能。对水中Cr(Ⅵ)离子的荧光传感检测结果表明,Zr-MOF在多种混合阴/阳离子的干扰下,可以对水中痕量的Cr O42-和Cr2O72-离子进行高选择性荧光淬灭识别和定量检测,其检出限分别为6.704和11.232 mg/L。并提出了Zr-MOF的光致发光和荧光淬灭检测机制。此外,经过7次连续的荧光检测循环后,Zr-MOF的荧光发射强度仍能维持在95%以上。
Considering the pollution caused by heavy metal chromium ions in printing and dyeing wastewater,zirconium chloride and 2,2’-biquinoline-4,4’-dicarboxylic acid (H2L) were used to synthesize Zr-metal organic framework (Zr-MOF).The structural stability in water and in strong acid/base environments and photoluminescence property of Zr-MOF were confirmed by powder X-ray diffraction and fluorescence tests.The results of fluorescence sensing detection of Cr(Ⅵ) ions show that Zr-MOF performs highly selective fluorescence quenching recognition and quantitative detection towards trace CrO42-and Cr2O72-ions in water,under the interference of a variety of mixed anion and ions.The detection limits are confirmed to be 6.704 and 11.232 mg/L for CrO42-and Cr2O72-ions,respectively.The photoluminescence and fluorescence quenching detection mechanisms of Zr-MOF are proposed.Furthermore,after 7 consecutive fluorescence detection cycles,the fluorescence emission intensity of ZrMOF still retains at above 95%.
作者
管斌斌
李庆
陈灵辉
徐宇婷
樊增禄
GUAN Binbin;LI Qing;CHEN Linghui;XU Yuting;FAN Zenglu(Xi′an Key Laboratory of Textile Chemical Engineering Auxiliaries, Xi′an Polytechnic University, Xi′an, Shaanxi710048, China;School of Environmental & Chemical Engineering, Xi′an Polytechnic University, Xi′an, Shaanxi710048, China;Key Laboratory of Functional Textile Materials and Products, Ministry of Education, Xi′an Polytechnic University, Xi′an, Shaanxi 710048, China)
出处
《纺织学报》
EI
CAS
CSCD
北大核心
2021年第2期122-128,共7页
Journal of Textile Research
基金
国家自然科学基金面上项目(22078253)
国家级大学生创新训练计划项目(S202010709027)
陕西省重点研发计划项目(2020GY-276)
陕西省教育厅专项项目(19JC016)
西安市科技计划项目(2019217114GXRC007CG008-GXYD7.1,BLKJ2020YYJS-0001)
西安工程大学研究生创新基金项目(chx2020023)。
关键词
印染废水
铬(Ⅵ)
Zr-金属有机骨架
荧光检测
抗干扰
printing and dyeing wastewater
Cr(Ⅵ)
Zr-organic framework
fluorescence detection
anti-interference
作者简介
第一作者:管斌斌(1995—),男,硕士生。主要研究方向为功能性金属有机框架材料的构筑及其对染料废水的处理;通讯作者:李庆(1983—),男,副教授,博士。主要研究方向为金属-有机框架材料的构筑及在水环境修复中的应用。E-mail:liqingxpu1@163.com。
