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Open AccessArticle

Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO2 Gas Detection or for Wastewaters Color Removal

1
Institute of Chemistry “Coriolan Dragulescu” of Romanian Academy, M. Viteazul Ave, No. 24, 300223 Timisoara, Romania
2
National Institute for Research and Development in Electrochemistry and Condensed Matter, P. Andronescu Street 1, 300224 Timisoara, Romania
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2020, 21(12), 4262; https://doi.org/10.3390/ijms21124262
Received: 15 May 2020 / Revised: 6 June 2020 / Accepted: 15 June 2020 / Published: 15 June 2020
(This article belongs to the Special Issue Advances in the Chemistry of Porphyrins and Related Macrocycles)
Multifunctional hybrid materials with applications in gas sensing or dye removal from wastewaters were obtained by incorporation into silica matrices of either Pt(II)-5,10,15,20-tetra-(4-allyloxy-phenyl)-porphyrin (PtTAOPP) or platinum nanoparticles (PtNPs) alone or accompanied by 5,10,15,20-tetra-(4-allyloxy-phenyl)-porphyrin (TAOPP). The tetraethylorthosilicate (TEOS)-based silica matrices were obtained by using the sol-gel method performed in two step acid-base catalysis. Optical, structural and morphological properties of the hybrid materials were determined and compared by UV-vis, fluorescence and FT-IR spectroscopy techniques, by atomic force microscopy (AFM) and high resolution transmission electron microscopy (HRTEM) and by Brunauer–Emmett–Teller (BET) analysis. PtTAOPP-silica hybrid was the most efficient material both for CO2 adsorption (0.025 mol/g) and for methylene blue adsorption (7.26 mg/g) from wastewaters. These results were expected due to both the ink-bottle mesopores having large necks that exist in this hybrid material and to the presence of the porphyrin moiety that facilitates chemical interactions with either CO2 gas or the dye molecule. Kinetic studies concerning the mechanism of dye adsorption demonstrated a second order kinetic model, thus it might be attributed to both physical and chemical processes. View Full-Text
Keywords: Pt-pophyrin; PtNPs; silica hybrid materials; wet carbon dioxide adsorption; toxic dyes Pt-pophyrin; PtNPs; silica hybrid materials; wet carbon dioxide adsorption; toxic dyes
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MDPI and ACS Style

Anghel, D.; Lascu, A.; Epuran, C.; Fratilescu, I.; Ianasi, C.; Birdeanu, M.; Fagadar-Cosma, E. Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO2 Gas Detection or for Wastewaters Color Removal. Int. J. Mol. Sci. 2020, 21, 4262. https://doi.org/10.3390/ijms21124262

AMA Style

Anghel D, Lascu A, Epuran C, Fratilescu I, Ianasi C, Birdeanu M, Fagadar-Cosma E. Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO2 Gas Detection or for Wastewaters Color Removal. International Journal of Molecular Sciences. 2020; 21(12):4262. https://doi.org/10.3390/ijms21124262

Chicago/Turabian Style

Anghel, Diana; Lascu, Anca; Epuran, Camelia; Fratilescu, Ion; Ianasi, Catalin; Birdeanu, Mihaela; Fagadar-Cosma, Eugenia. 2020. "Hybrid Materials Based on Silica Matrices Impregnated with Pt-Porphyrin or PtNPs Destined for CO2 Gas Detection or for Wastewaters Color Removal" Int. J. Mol. Sci. 21, no. 12: 4262. https://doi.org/10.3390/ijms21124262

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