Size-controlled synthesis of monodispersed mesoporous silica nano-spheres under a neutral condition |
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| Authors: | Qianjun He Xiangzhi Cui Fangming Cui Limin Guo Jianlin Shi |
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| Affiliation: | 1. Research Center for Bioengineering and Sensing Technology, University of Science & Technology Beijing, Beijing 100083, China;2. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3. Department of Chemistry and Centre de Recherche sur les Matériaux Avancés (CERMA), Université Laval, Quebec City, QC G1V 0A6, Canada;4. School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia;1. School of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210023, PR China;2. Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China;3. Department of Medical Imaging, Jinling Hospital, School of Medicine, Nanjing University, Nanjing 210002, PR China;1. Institut Charles Gerhardt Montpellier, UMR 5253, CC 1701 Equipe Ingénierie Moléculaire et Nano-objets, Place Eugène Bataillon, 34095, Montpellier Cedex 05, France;2. Laboratoire de Physico-Chimie des Matériaux Minéraux et leurs Applications, Centre National de Recherches en Sciences des Matériaux, B.P. 95, Hammam-Lif, 2050, Tunisia;3. Institut de Biomolécules Max Mousseron, UMR 5247, Avenue Charles Flahault, 34093, Montpellier Cedex 05, France;1. CONACyT Research Fellow–Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo # 140, 25294 Saltillo, Coahuila, México;2. Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo # 140, 25294 Saltillo, Coahuila, México;3. CONACyT Research Fellow–DMCyP‐University of Guadalajara, 45020, Zapopan, Jalisco, México |
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| Abstract: | Under a neutral condition, monodispersed mesoporous silica nano-spheres (MSNs) with controllable size were synthesized. The effects of temperature, structure-directing agent (SDA), co-surfactant/co-solvent propanetriol (PT) and multistep addition modes on particle size and the dispersivity of MSNs were studied. The results showed that MSNs became bigger and more uniform in size with the increase of the temperature. Compared with single surfactant, the use of cationic–nonionic composite surfactants of CTAB and Brij-56 as SDA resulted in the improved dispersivity and regularity of spherical shape, and the decreased particle size of MSNs. PT as additive effectively improved the monodispersivity of MSNs. With the gradual increase of the PT concentration, PT played a role of co-surfactant at first and then of co-solvent, resulting in an unusual dependence of the particle size of MSNs on the PT concentration. Multistep addition modes further contributed to the uniformity and bigger size of MSNs. |
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