Journal
JOURNAL OF ENVIRONMENTAL MONITORING
Volume 11, Issue 3, Pages 648-653Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b815287j
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Funding
- National Natural Science Foundation of China
- Start-Up Foundation of Dalian University of Technology
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An inorganic-organic hybrid fluorescence chemosensor (R6G-SBA-15) was prepared by covalent immobilization of a Rhodamine 6G derivative within the channels of mesoporous silica material SBA-15 via triethoxysilane groups. The primary hexagonally ordered mesoporous structure of SBA-15 is preserved after the grafting procedure. R6G- SBA-15 features effectively chromogenical and fluorogenical responses with a broad pH span (2-10), excellent sensitivity to environmentally relevant mercury levels lower to ppb range. It also exhibits Hg2+-specificity over various competitive cations, including alkali and alkaliearth, the first-row transition metals as well as heavy metals such as Pb2+, Cd2+ and Ag+, etc. Additional experiments establish the well-fitted linearity function of the fluorescent intensity with the concentration of Hg2+ in aqueous solution, suggesting the possibility for real-time qualitative or quantitative detection of Hg2+ and the convenience for potential application in toxicology and environmental science.
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