期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 132, 期 3, 页码 470-479出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2010.03.029
关键词
Mesoporous silica; Grafting; Transition metals; Adsorption; PPCPs
类别
资金
- National Science Foundation [CBET-0546370, CBET-0619349]
- Puerto Rico NASA
Incorporation of transition metals onto the surface of mesoporous silica via grafting techniques could become a potential strategy for the bottom-up design of sorbents for the removal of pharmaceutical drugs and other emerging contaminants from water sources. Here we report the incorporation of Co2+, Ni2+ or Cu2+ onto the surface of mesoporous SBA-15 via an amino-organic grafting method and the screening of the materials as sorbents for the removal of Naproxen from water. The functionalization procedure involved the reaction of 3-aminopropyltriethoxysilane with OH groups available on SBA-15 surfaces, followed by the anchoring of the desired metal. Removal of traces of sulfates from the metal sources and further metal anchoring were achieved after post-synthesis treatment at alkaline conditions. The resulting metal-modified materials were fully characterized using X-ray powder diffraction, N-2 adsorption/desorption isotherms gathered at -196 degrees C, SEM/EDX, FT-IR, and TGA. Aqueous phase single point adsorption experiments showed that Cu-based materials are good sorbents for the uptake of low-concentration Naproxen at 25 degrees C and approaching alkaline conditions. The materials uptake capacities decreased as follows: CuNH2_g_SBA-15 > NiNH2_g_SBA-15 > CoNH2_g_SBA-15. In general, the adsorption results correlate well with the observed structural and textural properties of the materials, suggesting also that the metal amino-organic loading is highly dependent on the nature of grafting process and choice of metal. (C) 2010 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据