A novel material, aminopropyl-functionalized manganese-loaded SBA-15（NH2-Mn-SBA-15）, was synthesized by bonding 3-aminopropyl trimethoxysilane（APTMS） onto manganeseloaded SBA-15（Mn-SBA-15） and used as a Cu2＋ads...A novel material, aminopropyl-functionalized manganese-loaded SBA-15（NH2-Mn-SBA-15）, was synthesized by bonding 3-aminopropyl trimethoxysilane（APTMS） onto manganeseloaded SBA-15（Mn-SBA-15） and used as a Cu2＋adsorbent in aqueous solution. Fourier transform infrared spectroscopy（FT-IR）, X-ray diffraction spectra（XRD）, N2adsorption/desorption isotherms, high resolution field emission scanning electron microscopy（FESEM）and X-ray photoelectron spectroscopy（XPS） were used to characterize the NH2-Mn-SBA-15.The ordered mesoporous structure of SBA-15 was remained after modification. The manganese oxides were mainly loaded on the internal surface of the pore channels while the aminopropyl groups were mainly anchored on the external surface of SBA-15. The adsorption of Cu2＋on NH2-Mn-SBA-15 was fitted well by the Langmuir equation and the maximum adsorption capacity of NH2-Mn-SBA-15 for Cu2＋was over two times higher than that of Mn-SBA-15 under the same conditions. The Elovich equation gave a good fit for the adsorption process of Cu2＋by NH2-Mn-SBA-15 and Mn-SBA-15. Both the loaded manganese oxides and the anchored aminopropyl groups were found to contribute to the uptake of Cu2＋. The NH2-Mn-SBA-15 showed high selectivity for copper ions. Consecutive adsorption–desorption experiments showed that the NH2-Mn-SBA-15 could be regenerated by acid treatment without altering its properties.展开更多
基金supported by the Fundamental Research Funds for the Central Universities (No. TD2010-5)the National Natural Science Research Fund (No. 51278051)the Beijing Forestry University Young Scientist Fund (No. BLX2009018)
文摘A novel material, aminopropyl-functionalized manganese-loaded SBA-15（NH2-Mn-SBA-15）, was synthesized by bonding 3-aminopropyl trimethoxysilane（APTMS） onto manganeseloaded SBA-15（Mn-SBA-15） and used as a Cu2＋adsorbent in aqueous solution. Fourier transform infrared spectroscopy（FT-IR）, X-ray diffraction spectra（XRD）, N2adsorption/desorption isotherms, high resolution field emission scanning electron microscopy（FESEM）and X-ray photoelectron spectroscopy（XPS） were used to characterize the NH2-Mn-SBA-15.The ordered mesoporous structure of SBA-15 was remained after modification. The manganese oxides were mainly loaded on the internal surface of the pore channels while the aminopropyl groups were mainly anchored on the external surface of SBA-15. The adsorption of Cu2＋on NH2-Mn-SBA-15 was fitted well by the Langmuir equation and the maximum adsorption capacity of NH2-Mn-SBA-15 for Cu2＋was over two times higher than that of Mn-SBA-15 under the same conditions. The Elovich equation gave a good fit for the adsorption process of Cu2＋by NH2-Mn-SBA-15 and Mn-SBA-15. Both the loaded manganese oxides and the anchored aminopropyl groups were found to contribute to the uptake of Cu2＋. The NH2-Mn-SBA-15 showed high selectivity for copper ions. Consecutive adsorption–desorption experiments showed that the NH2-Mn-SBA-15 could be regenerated by acid treatment without altering its properties.
