Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption
In this work, the synthesis of ordered mesoporous silica of MCM-41 type was investigated aimed at improving its morphology by varying the synthesis conditions in a one-pot process, employing different temperatures and solvent conditions. 2-methoxyethanol was used as co-solvent to ethanol. The co-sol...
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MDPI AG
2022-07-01
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| Online Access: | https://www.mdpi.com/2310-2861/8/7/443 |
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| author | Ana-Maria Putz Oleksandr I. Ivankov Alexander I. Kuklin Vasyl Ryukhtin Cătălin Ianăşi Mihaela Ciopec Adina Negrea László Trif Zsolt Endre Horváth László Almásy |
| author_facet | Ana-Maria Putz Oleksandr I. Ivankov Alexander I. Kuklin Vasyl Ryukhtin Cătălin Ianăşi Mihaela Ciopec Adina Negrea László Trif Zsolt Endre Horváth László Almásy |
| author_sort | Ana-Maria Putz |
| collection | DOAJ |
| description | In this work, the synthesis of ordered mesoporous silica of MCM-41 type was investigated aimed at improving its morphology by varying the synthesis conditions in a one-pot process, employing different temperatures and solvent conditions. 2-methoxyethanol was used as co-solvent to ethanol. The co-solvent ratio and the synthesis temperature were varied. The pore morphology of the materials was characterized by nitrogen porosimetry and small angle neutron scattering (SANS), and the particle morphology by transmission electron microscopy (TEM) and ultra-small angle neutron scattering (USANS). The thermal behavior was investigated by simultaneous thermogravimetry-differential scanning calorimetry (TG-DSC) measurements. The SANS and N<sub>2</sub> sorption results demonstrated that a well-ordered mesoporous structure was obtained at all conditions in the synthesis at room temperature. Addition of methoxyethanol led to an increase of the pore wall thickness. Simultaneously, an increase of methoxyethanol content led to lowering of the mean particle size from 300 to 230 nm, according to the ultra-small angle scattering data. The ordered porosity and high specific surfaces make these materials suitable for applications such as adsorbents in environmental remediation. Batch adsorption measurements of metal ion removal from aqueous solutions of Cu(II) and Pb(II) showed that the materials exhibit dominantly monolayer surface adsorption characteristics. The adsorption capacities were 9.7 mg/g for Cu(II) and 18.8 mg/g for Pb(II) at pH 5, making these materials competitive in performance to various composite materials. |
| first_indexed | 2024-03-09T10:18:22Z |
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| language | English |
| last_indexed | 2024-03-09T10:18:22Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Gels |
| spelling | doaj.art-7c10f1c7a38d4a9eb4bae46e50b7a8912023-12-01T22:10:59ZengMDPI AGGels2310-28612022-07-018744310.3390/gels8070443Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) AdsorptionAna-Maria Putz0Oleksandr I. Ivankov1Alexander I. Kuklin2Vasyl Ryukhtin3Cătălin Ianăşi4Mihaela Ciopec5Adina Negrea6László Trif7Zsolt Endre Horváth8László Almásy9“Coriolan Drăgulescu” Institute of Chemistry, Bv. Mihai Viteazul, No. 24, 300223 Timisoara, RomaniaFrank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, RussiaFrank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Joliot-Curie 6, 141980 Dubna, RussiaNuclear Physics Institute, ASCR, Husinec—Řež 130, 250 68 Řež, Czech Republic“Coriolan Drăgulescu” Institute of Chemistry, Bv. Mihai Viteazul, No. 24, 300223 Timisoara, RomaniaFaculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timişoara, 6th Vasile Pârvan Bvd., 300223 Timisoara, RomaniaFaculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timişoara, 6th Vasile Pârvan Bvd., 300223 Timisoara, RomaniaInstitute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Magyar Tudósok Körútja 2, 1117 Budapest, HungaryInstitute for Technical Physics and Material Science, Centre for Energy Research, Konkoly-Thege Miklós út 29-33, 1121 Budapest, HungaryInstitute for Energy Security and Environmental Safety, Centre for Energy Research, Konkoly-Thege Miklós út 29-33, 1121 Budapest, HungaryIn this work, the synthesis of ordered mesoporous silica of MCM-41 type was investigated aimed at improving its morphology by varying the synthesis conditions in a one-pot process, employing different temperatures and solvent conditions. 2-methoxyethanol was used as co-solvent to ethanol. The co-solvent ratio and the synthesis temperature were varied. The pore morphology of the materials was characterized by nitrogen porosimetry and small angle neutron scattering (SANS), and the particle morphology by transmission electron microscopy (TEM) and ultra-small angle neutron scattering (USANS). The thermal behavior was investigated by simultaneous thermogravimetry-differential scanning calorimetry (TG-DSC) measurements. The SANS and N<sub>2</sub> sorption results demonstrated that a well-ordered mesoporous structure was obtained at all conditions in the synthesis at room temperature. Addition of methoxyethanol led to an increase of the pore wall thickness. Simultaneously, an increase of methoxyethanol content led to lowering of the mean particle size from 300 to 230 nm, according to the ultra-small angle scattering data. The ordered porosity and high specific surfaces make these materials suitable for applications such as adsorbents in environmental remediation. Batch adsorption measurements of metal ion removal from aqueous solutions of Cu(II) and Pb(II) showed that the materials exhibit dominantly monolayer surface adsorption characteristics. The adsorption capacities were 9.7 mg/g for Cu(II) and 18.8 mg/g for Pb(II) at pH 5, making these materials competitive in performance to various composite materials.https://www.mdpi.com/2310-2861/8/7/443MCM-41SANSUSANSSAXSStöber method2-methoxyethanol |
| spellingShingle | Ana-Maria Putz Oleksandr I. Ivankov Alexander I. Kuklin Vasyl Ryukhtin Cătălin Ianăşi Mihaela Ciopec Adina Negrea László Trif Zsolt Endre Horváth László Almásy Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption Gels MCM-41 SANS USANS SAXS Stöber method 2-methoxyethanol |
| title | Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption |
| title_full | Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption |
| title_fullStr | Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption |
| title_full_unstemmed | Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption |
| title_short | Ordered Mesoporous Silica Prepared in Different Solvent Conditions: Application for Cu(II) and Pb(II) Adsorption |
| title_sort | ordered mesoporous silica prepared in different solvent conditions application for cu ii and pb ii adsorption |
| topic | MCM-41 SANS USANS SAXS Stöber method 2-methoxyethanol |
| url | https://www.mdpi.com/2310-2861/8/7/443 |
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