Hydrophobic micro/mesoporous silica spheres assembled from zeolite precursors in acidic media for aromatics adsorption
文献类型：期刊论文
| 作者 | Dou, Baojuan; Li, Jinjun; Hu, Qin; Ma, Chunyan; He, Chi; Li, Peng; Hu, Qiuhong; Hao, Zhengping; Qiao, Shizhang |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2010-09 |
| 卷号 | 133期号:3页码:115-123 |
| 关键词 | Acidic media Micro/mesoporous materials Microporosity VOCs adsorption Hydrophobicity |
| 中文摘要 | The micro/mesoscopic silicas (MMS) were successfully synthesized with a self-assembly approach by employing silicalite-1 zeolite seeds as precursors in acid media. The resulting MMS samples were characterized by X-ray diffraction (XRD), nitrogen adsorption/desorption, n-nonane pre-adsorption and transmission electron microscopy (TEM). After aging for 18 h, the obtained materials exhibit both well-defined low- and high-angle XRD peaks. The XRD results combined with other characterizations confirm that the zeolite precursors, after aging for 18 h, were assembled to hierarchical porous composites, featuring both zeolite-like microporous and mesoporous structures rather than a physical mixture of bulk zeolite and mesoporous solid. It was found that the MMS samples exhibit spherical morphology, with high surface area and large total pore volume. Even with the aging time increasing up to 24 h, the obtained biporous composite MMS-24 still presents high surface area of 536 m(2) g(-1) and large total pore volume of 0.66 cm(3) g(-1). The adsorption of benzene by the hierarchical materials under static and dynamic conditions was also investigated. The results of the adsorption isotherms and isosteric adsorption heat reveal that MMS-24 represents super hydrophobicity and high affinity towards aromatics. The adsorption capacity of benzene on MMS-24 is approximately three times higher than that on silicalite-1 zeolite. As indicated by the adsorption dynamic study, MMS-24 has high tendency towards benzene in the presence of water vapor, retaining high benzene removal efficiency (85%) comparing with that under dry condition. (C) 2010 Elsevier Inc. All rights reserved. |
| WOS记录号 | WOS:000279061000015 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/21184]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Dou, Baojuan,Li, Jinjun,Hu, Qin,et al. Hydrophobic micro/mesoporous silica spheres assembled from zeolite precursors in acidic media for aromatics adsorption[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2010,133(3):115-123. |
| APA | Dou, Baojuan.,Li, Jinjun.,Hu, Qin.,Ma, Chunyan.,He, Chi.,...&Qiao, Shizhang.(2010).Hydrophobic micro/mesoporous silica spheres assembled from zeolite precursors in acidic media for aromatics adsorption.MICROPOROUS AND MESOPOROUS MATERIALS,133(3),115-123. |
| MLA | Dou, Baojuan,et al."Hydrophobic micro/mesoporous silica spheres assembled from zeolite precursors in acidic media for aromatics adsorption".MICROPOROUS AND MESOPOROUS MATERIALS 133.3(2010):115-123. |
入库方式： OAI收割
来源：生态环境研究中心
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