Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions
We successfully synthesize monodisperse sulfhydryl-modified mesoporous organosilica nanospheres (MONs-SH) via one-step hydrolytic condensation, where cetyltrimethylammonium chloride and dodecyl sulfobetaine are employed as dual-template agents with (3-mercaptopropyl)triethoxysilane and 1,2-bis(triet...
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2025-01-01
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| author | Liping Deng Shichun Gu Ruyi Wang Yapeng He Hairong Dong Xue Wang |
| author_facet | Liping Deng Shichun Gu Ruyi Wang Yapeng He Hairong Dong Xue Wang |
| author_sort | Liping Deng |
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| description | We successfully synthesize monodisperse sulfhydryl-modified mesoporous organosilica nanospheres (MONs-SH) via one-step hydrolytic condensation, where cetyltrimethylammonium chloride and dodecyl sulfobetaine are employed as dual-template agents with (3-mercaptopropyl)triethoxysilane and 1,2-bis(triethoxysilyl)ethane as the precursors and concentrated ammonia as the alkaline catalyst. The prepared MONs-SHs deliver a large specific surface area (729.15 m<sup>2</sup> g<sup>−1</sup>), excellent monodispersity, and homogeneous particle size. The introduction of ethanol into the reaction systems could expand the particle size of the synthesized MONs-SH materials from 18 to 182 nm. Moreover, the successful modification of -SH groups endowed MONs-SHs with an excellent adsorption capacity (297.12 mg g<sup>−1</sup>) for Pb<sup>2+</sup> ions in aqueous solution through ion exchange and complexation function. In addition, the established isotherm model and kinetic analyses reveal that the adsorption of Pb<sup>2+</sup> ions on MONs-SHs follows the secondary reaction kinetic models, where both physisorption and chemisorption contribute to the adsorption of Pb<sup>2+</sup> ions. The favorable recyclability of MONs-SHs is demonstrated with the maintained adsorption efficiency of 85.35% after six cycles. The results suggest that the synthesized MONs-SHs exhibit considerable application prospects for effectively eliminating Pb<sup>2+</sup> ions from aqueous solutions. |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
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| series | Nanomaterials |
| spelling | doaj-art-e5e6be921cb54a1dac264cd2bd3c881d2025-01-24T13:44:16ZengMDPI AGNanomaterials2079-49912025-01-0115213610.3390/nano15020136Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) IonsLiping Deng0Shichun Gu1Ruyi Wang2Yapeng He3Hairong Dong4Xue Wang5Yunnan Key Laboratory of Modern Separation Analysis and Substance Transformation, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Modern Separation Analysis and Substance Transformation, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Modern Separation Analysis and Substance Transformation, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, ChinaFaculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaYunnan Key Laboratory of Modern Separation Analysis and Substance Transformation, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, ChinaYunnan Key Laboratory of Modern Separation Analysis and Substance Transformation, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming 650500, ChinaWe successfully synthesize monodisperse sulfhydryl-modified mesoporous organosilica nanospheres (MONs-SH) via one-step hydrolytic condensation, where cetyltrimethylammonium chloride and dodecyl sulfobetaine are employed as dual-template agents with (3-mercaptopropyl)triethoxysilane and 1,2-bis(triethoxysilyl)ethane as the precursors and concentrated ammonia as the alkaline catalyst. The prepared MONs-SHs deliver a large specific surface area (729.15 m<sup>2</sup> g<sup>−1</sup>), excellent monodispersity, and homogeneous particle size. The introduction of ethanol into the reaction systems could expand the particle size of the synthesized MONs-SH materials from 18 to 182 nm. Moreover, the successful modification of -SH groups endowed MONs-SHs with an excellent adsorption capacity (297.12 mg g<sup>−1</sup>) for Pb<sup>2+</sup> ions in aqueous solution through ion exchange and complexation function. In addition, the established isotherm model and kinetic analyses reveal that the adsorption of Pb<sup>2+</sup> ions on MONs-SHs follows the secondary reaction kinetic models, where both physisorption and chemisorption contribute to the adsorption of Pb<sup>2+</sup> ions. The favorable recyclability of MONs-SHs is demonstrated with the maintained adsorption efficiency of 85.35% after six cycles. The results suggest that the synthesized MONs-SHs exhibit considerable application prospects for effectively eliminating Pb<sup>2+</sup> ions from aqueous solutions.https://www.mdpi.com/2079-4991/15/2/136one-step synthesismesoporous organosilica nanospheressulfhydryl modificationdual templateadsorption of Pb<sup>2+</sup> |
| spellingShingle | Liping Deng Shichun Gu Ruyi Wang Yapeng He Hairong Dong Xue Wang Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions Nanomaterials one-step synthesis mesoporous organosilica nanospheres sulfhydryl modification dual template adsorption of Pb<sup>2+</sup> |
| title | Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions |
| title_full | Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions |
| title_fullStr | Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions |
| title_full_unstemmed | Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions |
| title_short | Facile Synthesis of Functional Mesoporous Organosilica Nanospheres and Adsorption Properties Towards Pb(II) Ions |
| title_sort | facile synthesis of functional mesoporous organosilica nanospheres and adsorption properties towards pb ii ions |
| topic | one-step synthesis mesoporous organosilica nanospheres sulfhydryl modification dual template adsorption of Pb<sup>2+</sup> |
| url | https://www.mdpi.com/2079-4991/15/2/136 |
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