Mesoporous manganese–porphyrin–silica hybrid nanomaterial sensitive to H2O2 fluorescent detection
| Autor: | Mihaela Birdeanu, Anca Lascu, Eugenia Fagadar-Cosma, Gheorghe Fagadar-Cosma, Ionela Creanga, Anca Palade, Iuliana Sebarchievici, Cătălin Ianăşi |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Mechanical Engineering Analytical chemistry chemistry.chemical_element 02 engineering and technology Manganese Conductivity 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Fluorescence 0104 chemical sciences Nanomaterials Catalysis Electrochemical cell chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials General Materials Science 0210 nano-technology Mesoporous material Hydrogen peroxide |
| Zdroj: | Materials Research Bulletin. 74:325-332 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2015.10.032 |
| Popis: | A novel hybrid mesoporous silica–Mn–porphyrin nanomaterial and its application for fluorescent detection of H2O2 is reported. The hybrid was obtained by sol–gel method in two steps acid-base catalysis and was completely characterized by UV–vis, FT-IR, fluorimetric, DRX, BET, AFM, TEM and conductivity investigations. The influence of adding H2O2 to the silica–Mn–porphyrin hybrid generates major differences regarding the optical, textural and morphological properties of the material. The dependence between H2O2 concentration and the fluorescence intensity, measured at the emission maximum at the wavelength 655 nm, is linear with an excellent correlation coefficient of 0.9945. The high sensitivity for hydrogen peroxide in wet media noticed for this hybrid, accompanied by changes in color, justifies further investigations towards design of fluorimetric and colorimetric O2 gas sensors. The low conductivity of the manganese(III)porphyrin–silica hybrid (0.694 × 10−8 S/cm) can be improved, so that this material may become a promising one for electrochemical cells (batteries). |
| Databáze: | OpenAIRE |
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