Journal
NEW JOURNAL OF CHEMISTRY
Volume 39, Issue 12, Pages 9221-9227Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nj01348h
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Funding
- National Natural Science Foundation of China [21365005]
- Guangxi Natural Science Foundation of China [2014GXNSFGA118002]
- Innovation Project of Guangxi Graduate Education [YCSZ2015090]
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CuS (PCuS) particles were facilely synthesized by the wet-treatment of a Cu-based metal organic framework (HKUST-1). PCuS possesses an impressive intrinsic peroxidase-like activity. As a result of this affinity, PCuS readily binds to 3,3',5',5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2) (K-m values of 29 mu M and 150 mu M toward TMB and H2O2, respectively). Interestingly, when Hg2+ was added, HgS produced in conjunction with the specific binding sites on the surface of PCuS remarkably inhibited the peroxidase-like activity of PCuS. Based on this unique property, a sensing platform for the colorimetric detection of Hg2+ was established. In addition, high surface area and strong affinity for Hg2+ make PCuS an excellent adsorbent for Hg2+ (2105 mg g(-1)). These results indicate that PCuS could be a useful material for the facile detection and the efficient removal of Hg2+ using HKUST-1 as a precursor in environmental abatement applications.
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