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Synthesis of MgO-Modified mesoporous silica and its adsorption performance toward CO2 |
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| Authors: | Qiming Liu Juanjuan Ma Yuan Zhou Tianhe Wang |
| Institution: | 1. Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education/School of Physics and Technology, Wuhan University, Wuhan, 430072, Hubei, China 2. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, 430070, Hubei, China 3. GuoDian Science and Technology Research Institute, Nanjing, 210031, Jiangsu, China |
| Abstract: | The mesoporous silica modified with magnesium oxide (MgO) was synthesized by one step method and impregnating method, respectively. The samples were characterized by small angle X-Ray diffraction (XRD), N2 adsorption-desorption and transmission electron microscopy (TEM), and the carbon dioxide adsorption capacity was analyzed by thermal gravimetric analysis (TGA). Compared with the original mesoporous silica (20.7 mg/g), the CO2 adsorption capacity of MgO-modified mesoporous silica processed by one step method increases to 32.9 mg/g. Although its surface area greatly decreases compared with that of the original mesoporous silica, the MgO-modified mesoporous silica prepared by impregnating reaches an adsorptive value of 31.1 mg/g because the number of basic sites increases on the surface of the mesoporous silica. |
| Keywords: | magnesium oxide CO_ adsorption mesoporous silica |
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