Morphology control of ordered supermicroporous silicas |
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| Affiliation: | 1. Collaborative Innovation Center of Jiangxi Typical Trees Cultivation and Utilization, College of Forestry, Jiangxi Agricultural University, Nanchang 330045, China;2. School of Environmental and Land Resource Management, Jiangxi Agricultural University, Nanchang 330045, China;1. Institute of Chemical Engineering Polish Academy of Sciences, Bałtycka 5, 44-100 Gliwice, Poland;2. Department of Chemical Engineering and Process Design, Faculty of Chemistry, Silesian University of Technology, Strzody 7, 44-100 Gliwice, Poland;1. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, PR China;2. School of Engineering and Technology, China University of Geosciences, Beijing 100083, PR China |
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| Abstract: | A feasible method has been developed for the morphology control of ordered supermicroporous silicas by adopting a kind of rosin-based surfactant as the templating agent. By adjusting the molar ratio of sodium silicate (SS) and ethyl acetate (EA), the morphologies of the materials can be changed from hollow sphere to hollow tube, and solid rod, while the degree of ordering of the samples showed a trend of firstly increasing and then decreasing. When the molar ratio of SS/EA was 0.38, an ordered supermicroporous silica with a hollow tubular morphology was obtained. The material had a surface area of 645.5 m2/g, a pore volume of 0.3 cm3/g, and a pore size distribution centered at 1.8 nm. When the molar ratio of SS/EA was increased to 0.46, the resulting sample exhibited a solid-rod morphology with a highly ordered hexagonal supermicroporous structure. This material had a large surface area of 1478.1 m2/g, a high pore volume of 0.7 cm3/g, and a uniform pore size distribution centered at 2.0 nm. |
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| Keywords: | Supermicroporous Silica Morphology Rosin-based quaternary ammonium bromide |
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