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Ma J, Han J, Sun J, Fan L, Bai S, Jiao Y. pH-sensitive controlled release in vitro and pharmacokinetics of ibuprofen from hybrid nanocomposite using amine-modified bimodal mesopores silica as core and poly(methylacrylic acid) as shell. INT J POLYM MATER PO 2019. [DOI: 10.1080/00914037.2019.1655747] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- JiaYu Ma
- Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, China
| | - Jing Han
- Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, China
| | - JiHong Sun
- Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, China
| | - Li Fan
- Department of Pharmaceutical Chemistry and Analysis, School of Pharmacy, The Fourth Military Medical University, Xi’an, Shaanxi Province, China
| | - ShiYang Bai
- Beijing Key Laboratory for Green Catalysis and Separation, Department of Chemistry and Chemical Engineering, Beijing University of Technology, Beijing, China
| | - YuWen Jiao
- Department of Pharmaceutical Chemistry and Analysis, School of Pharmacy, The Fourth Military Medical University, Xi’an, Shaanxi Province, China
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Trouvé A, Batonneau-Gener I, Valange S, Bonne M, Mignard S. Tuning the hydrophobicity of mesoporous silica materials for the adsorption of organic pollutant in aqueous solution. JOURNAL OF HAZARDOUS MATERIALS 2012; 201-202:107-14. [PMID: 22169242 DOI: 10.1016/j.jhazmat.2011.11.043] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 10/26/2011] [Accepted: 11/14/2011] [Indexed: 05/15/2023]
Abstract
The ability of various as-prepared and organically modified MCM-41 and HMS mesoporous silica materials to behave as efficient adsorbents for organic pollutants in aqueous solution was investigated by using different surface functionalization procedures, so as to adjust their hydrophilic/hydrophobic balance. The hydrophilic and organophilic properties of the parent silica materials and their corresponding surface functionalized counterparts were studied by using water and toluene adsorption isotherms. Their quantification was determined by the hydrophobic static index value (HI(static)), as well as by the silanol and organic group densities after the functionalization step. A clear correlation could be found between the HI(static) values and either the superficial silanol density, or the amount of organic moieties grafted or incorporated to the silica materials. For the highly organically functionalized samples, the residual superficial silanol groups (<50%) are sufficiently isolated from each other so as to prevent the water capillary condensation within the pores, thereby leading to an increased hydrophobic character of the resulting mesoporous silica. Those hydrophobic samples, for which the water liquid meniscus formation within the mesopores was minimized or avoided, exhibited a storage capacity for an organic pollutant (N,N-diethyl-m-toluamide, DEET) in aqueous solution more than 20 times higher than that of the corresponding unmodified sample, independently of the silica nature (MCM-41 or HMS). For all calcined and silylated samples, the DEET maximum adsorption capacities determined by the Langmuir model could be correlated with the silica surface coverage by trimethylsilyl groups and thus with the remaining silanol amount.
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Affiliation(s)
- Adeline Trouvé
- LAboratoire de Catalyse en Chimie Organique, CNRS-UMR6503, 4 rue Michel Brunet, B27, F-86022 Poitiers cedex, France
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Puanngam M, Unob F. Preparation and use of chemically modified MCM-41 and silica gel as selective adsorbents for Hg(II) ions. JOURNAL OF HAZARDOUS MATERIALS 2008; 154:578-587. [PMID: 18063298 DOI: 10.1016/j.jhazmat.2007.10.090] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2007] [Revised: 10/17/2007] [Accepted: 10/18/2007] [Indexed: 05/25/2023]
Abstract
Adsorbents for Hg(II) ion extraction were prepared using amorphous silica gel and ordered MCM-41. Grafting with 2-(3-(2-aminoethylthio)propylthio)ethanamine was used to functionalize the silica. The functionalized adsorbents were characterized by nitrogen adsorption, X-ray diffraction, 13C MAS NMR spectroscopy and thermogravimetric analysis. The adsorption properties of the modified silica gel and MCM-41 were compared using batch method. The effect of pH, stirring time, ionic strength and foreign ions were studied. The extraction of Hg(II) ions occurred rapidly with the modified MCM-41 and the optimal pH range for the extraction by the modified materials was pH 4-7. Foreign ions, especially Cl- had some effect on the extraction efficiency of the modified silica gel and the modified MCM-41. The adsorption behavior of both adsorbents could be described by a Langmuir model at 298 K, and the maximum adsorption capacity of the modified silica gel and MCM-41 at pH 3 was 0.79 and 0.70 mmol g(-1), respectively. The modified MCM-41 showed a larger Langmuir constant than that of the modified silica gel, indicating a better ability for Hg(II) ion adsorption. The results indicate that the structure of the materials affects the adsorption behavior. These materials show a potential for the application as effective and selective adsorbents for Hg(II) removal from water.
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Affiliation(s)
- Mahitti Puanngam
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Payathai Road, Bangkok 10330, Thailand
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Shenderovich IG, Mauder D, Akcakayiran D, Buntkowsky G, Limbach HH, Findenegg GH. NMR Provides Checklist of Generic Properties for Atomic-Scale Models of Periodic Mesoporous Silicas. J Phys Chem B 2007; 111:12088-96. [DOI: 10.1021/jp073682m] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ilja G. Shenderovich
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, Berlin, D-14195, Germany, Institut für Chemie, Stranski-Laboratorium, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin, D-10623, Germany, Institut für Physikalische Chemie, Universität Jena, Helmholtzweg 4, Jena, D-07743, Germany, and V. A. Fock Institute of Physics, St. Petersburg State University, Ulyanovskaja 1, 198504 Peterhof, Russia
| | - Daniel Mauder
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, Berlin, D-14195, Germany, Institut für Chemie, Stranski-Laboratorium, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin, D-10623, Germany, Institut für Physikalische Chemie, Universität Jena, Helmholtzweg 4, Jena, D-07743, Germany, and V. A. Fock Institute of Physics, St. Petersburg State University, Ulyanovskaja 1, 198504 Peterhof, Russia
| | - Dilek Akcakayiran
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, Berlin, D-14195, Germany, Institut für Chemie, Stranski-Laboratorium, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin, D-10623, Germany, Institut für Physikalische Chemie, Universität Jena, Helmholtzweg 4, Jena, D-07743, Germany, and V. A. Fock Institute of Physics, St. Petersburg State University, Ulyanovskaja 1, 198504 Peterhof, Russia
| | - Gerd Buntkowsky
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, Berlin, D-14195, Germany, Institut für Chemie, Stranski-Laboratorium, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin, D-10623, Germany, Institut für Physikalische Chemie, Universität Jena, Helmholtzweg 4, Jena, D-07743, Germany, and V. A. Fock Institute of Physics, St. Petersburg State University, Ulyanovskaja 1, 198504 Peterhof, Russia
| | - Hans-Heinrich Limbach
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, Berlin, D-14195, Germany, Institut für Chemie, Stranski-Laboratorium, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin, D-10623, Germany, Institut für Physikalische Chemie, Universität Jena, Helmholtzweg 4, Jena, D-07743, Germany, and V. A. Fock Institute of Physics, St. Petersburg State University, Ulyanovskaja 1, 198504 Peterhof, Russia
| | - Gerhard H. Findenegg
- Institut für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, Berlin, D-14195, Germany, Institut für Chemie, Stranski-Laboratorium, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin, D-10623, Germany, Institut für Physikalische Chemie, Universität Jena, Helmholtzweg 4, Jena, D-07743, Germany, and V. A. Fock Institute of Physics, St. Petersburg State University, Ulyanovskaja 1, 198504 Peterhof, Russia
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