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  首页 >> 服务支持 >> 技术文章 >> Efficient Capture and Effective Sensing of Cr2O72– from Water Using a Zirconium Metal–Organic Framework
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Efficient Capture and Effective Sensing of Cr2O72– from Water Using a Zirconium Metal–Organic Framework
[ 发布时间:2019-03-19 | 浏览数:130 ]

     

 

 

 

作者:Zu-Jin Lin*†‡ , He-Qi Zheng, Huan-Yu Zheng, Li-Ping Lin, Qin Xin, and Rong Cao

Department of Applied Chemistry, College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P. R. China

State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China 

 

 

摘要:Highly efficient decontamination of heavily toxic Cr2O72from water remains a serious task for public health and ecosystem protection. An easily regenerative and reused sorbent with suitable porosity may address this task. Herein, a series of water-stable and ecofriendly metalorganic frameworks (MOFs) with large surface areas were assessed for their ability to adsorb and separate Cr2O72from aqueous solutions. Among these tested MOFs, NU-1000 shows an extraordinary capability to efficiently capture (within 3 min) Cr2O72with a sorption capacity of up to 76.8 mg/g, which is the largest one for the neutral MOF-based Cr2O72sorbents. NU-1000 also shows remarkable selectivity for Cr2O72capture and can effectively reduce the Cr(VI) concentration from 24 ppm to 60 ppb, which is below the acceptable limit for the drinking water standard (100 ppb by the U.S. Environmental Protection Agency). Moreover, this adsorbent can be easily regenerated by Soxhlet extraction with an acidic methanol solution (2.5 M HCl) and can be reused at least three times without a significant loss of it adsorption ability. More intriguingly, NU-1000 can also serve as an efficient photoluminescent probe for the selective detection of Cr2O72in aqueous media. The Cr2O72detection limit is as low as 1.8 μM, and the linear range is from 1.8 to 340 μM. Our work shows that NU-1000 is a unique material combining both efficient sorption and exceptional fluorescent sensing of Cr2O72in aqueous media.

 


 

 
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