Electrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites
Аутори
Milikić, JadrankaSavić, Marjetka
Janošević Ležaić, Aleksandra
Šljukić, Biljana
Ćirić-Marjanović, Gordana
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
For the first time, composites of metal-organic framework MOF-5 and conjugated polymer polyaniline (PANI), (MOF-5/PANI), prepared using PANI in its conducting (emeraldine salt, ES) or nonconducting form (emeraldine base, EB) at various MOF-5 and PANI mass ratios, were evaluated as electrode materials for the electrochemical detection of cadmium (Cd2+) and lead (Pb2+) ions in aqueous solutions. Testing of individual components of composites, PANI-ES, PANI-EB, and MOF-5, was also performed for comparison. Materials are characterized by Raman spectroscopy, scanning electron microscopy (SEM) and dynamic light scattering (DLS), and their electrochemical behavior was discussed in terms of their zeta potential, structural, morphology, and textural properties. All examined composites showed high electrocatalytic activity for the oxidation of Cd and Pb to Cd2+ and Pb2+, respectively. The MOF/EB-1 composite (71.0 wt.% MOF-5) gave the highest oxidation currents during both individual and simultan...eous detection of two heavy metal ions. Current densities recorded with MOF/EB-1 were also higher than those of its individual components, reflecting the synergistic effect where MOF-5 offers high surface area for two heavy metals adsorption and PANI offers a network for electron transfer during metals’ subsequent oxidation. Limits of detection using MOF/EB-1 electrode for Cd2+ and Pb2+ sensing were found to be as low as 0.077 ppm and 0.033 ppm, respectively. Moreover, the well-defined and intense peaks of Cd oxidation to Cd2+ and somewhat lower peaks of Pb oxidation to Pb2+ were observed at voltammograms obtained for the Danube River as a real sample with no pretreatment, which implies that herein tested MOF-5/PANI electrodes could be used as electrochemical sensors for the detection of heavy metal ions in the real water samples.
Кључне речи:
metal-organic framework / MOF-5 / polyaniline / composite / cadmium ion / lead ion / electroanalytical sensingИзвор:
Polymers, 2024, 16, 5, 683-Финансирање / пројекти:
- AdConPolyMat - Advanced Conducting Polymer-Based Materials for Electrochemical Energy Conversion and Storage, Sensors and Environmental Protection (RS-ScienceFundRS-Ideje-7750219)
Колекције
Институција/група
VinčaTY - JOUR AU - Milikić, Jadranka AU - Savić, Marjetka AU - Janošević Ležaić, Aleksandra AU - Šljukić, Biljana AU - Ćirić-Marjanović, Gordana PY - 2024 UR - https://vinar.vin.bg.ac.rs/handle/123456789/13028 AB - For the first time, composites of metal-organic framework MOF-5 and conjugated polymer polyaniline (PANI), (MOF-5/PANI), prepared using PANI in its conducting (emeraldine salt, ES) or nonconducting form (emeraldine base, EB) at various MOF-5 and PANI mass ratios, were evaluated as electrode materials for the electrochemical detection of cadmium (Cd2+) and lead (Pb2+) ions in aqueous solutions. Testing of individual components of composites, PANI-ES, PANI-EB, and MOF-5, was also performed for comparison. Materials are characterized by Raman spectroscopy, scanning electron microscopy (SEM) and dynamic light scattering (DLS), and their electrochemical behavior was discussed in terms of their zeta potential, structural, morphology, and textural properties. All examined composites showed high electrocatalytic activity for the oxidation of Cd and Pb to Cd2+ and Pb2+, respectively. The MOF/EB-1 composite (71.0 wt.% MOF-5) gave the highest oxidation currents during both individual and simultaneous detection of two heavy metal ions. Current densities recorded with MOF/EB-1 were also higher than those of its individual components, reflecting the synergistic effect where MOF-5 offers high surface area for two heavy metals adsorption and PANI offers a network for electron transfer during metals’ subsequent oxidation. Limits of detection using MOF/EB-1 electrode for Cd2+ and Pb2+ sensing were found to be as low as 0.077 ppm and 0.033 ppm, respectively. Moreover, the well-defined and intense peaks of Cd oxidation to Cd2+ and somewhat lower peaks of Pb oxidation to Pb2+ were observed at voltammograms obtained for the Danube River as a real sample with no pretreatment, which implies that herein tested MOF-5/PANI electrodes could be used as electrochemical sensors for the detection of heavy metal ions in the real water samples. T2 - Polymers T1 - Electrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites VL - 16 IS - 5 SP - 683 DO - 10.3390/polym16050683 ER -
@article{ author = "Milikić, Jadranka and Savić, Marjetka and Janošević Ležaić, Aleksandra and Šljukić, Biljana and Ćirić-Marjanović, Gordana", year = "2024", abstract = "For the first time, composites of metal-organic framework MOF-5 and conjugated polymer polyaniline (PANI), (MOF-5/PANI), prepared using PANI in its conducting (emeraldine salt, ES) or nonconducting form (emeraldine base, EB) at various MOF-5 and PANI mass ratios, were evaluated as electrode materials for the electrochemical detection of cadmium (Cd2+) and lead (Pb2+) ions in aqueous solutions. Testing of individual components of composites, PANI-ES, PANI-EB, and MOF-5, was also performed for comparison. Materials are characterized by Raman spectroscopy, scanning electron microscopy (SEM) and dynamic light scattering (DLS), and their electrochemical behavior was discussed in terms of their zeta potential, structural, morphology, and textural properties. All examined composites showed high electrocatalytic activity for the oxidation of Cd and Pb to Cd2+ and Pb2+, respectively. The MOF/EB-1 composite (71.0 wt.% MOF-5) gave the highest oxidation currents during both individual and simultaneous detection of two heavy metal ions. Current densities recorded with MOF/EB-1 were also higher than those of its individual components, reflecting the synergistic effect where MOF-5 offers high surface area for two heavy metals adsorption and PANI offers a network for electron transfer during metals’ subsequent oxidation. Limits of detection using MOF/EB-1 electrode for Cd2+ and Pb2+ sensing were found to be as low as 0.077 ppm and 0.033 ppm, respectively. Moreover, the well-defined and intense peaks of Cd oxidation to Cd2+ and somewhat lower peaks of Pb oxidation to Pb2+ were observed at voltammograms obtained for the Danube River as a real sample with no pretreatment, which implies that herein tested MOF-5/PANI electrodes could be used as electrochemical sensors for the detection of heavy metal ions in the real water samples.", journal = "Polymers", title = "Electrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites", volume = "16", number = "5", pages = "683", doi = "10.3390/polym16050683" }
Milikić, J., Savić, M., Janošević Ležaić, A., Šljukić, B.,& Ćirić-Marjanović, G.. (2024). Electrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites. in Polymers, 16(5), 683. https://doi.org/10.3390/polym16050683
Milikić J, Savić M, Janošević Ležaić A, Šljukić B, Ćirić-Marjanović G. Electrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites. in Polymers. 2024;16(5):683. doi:10.3390/polym16050683 .
Milikić, Jadranka, Savić, Marjetka, Janošević Ležaić, Aleksandra, Šljukić, Biljana, Ćirić-Marjanović, Gordana, "Electrochemical Sensing of Cadmium and Lead Ions in Water by MOF-5/PANI Composites" in Polymers, 16, no. 5 (2024):683, https://doi.org/10.3390/polym16050683 . .