Amino-terminated SiO2 aerogel towards highly-effective lead (II) adsorbent via the ambient drying process
文献类型：期刊论文
| 作者 | Huang, Yu-Di; Gao, Xiang-Dong; Gu, Zheng-Ying; Li, Xiao-Min |
| 刊名 | JOURNAL OF NON-CRYSTALLINE SOLIDS
 |
| 出版日期 | 2016-07-01 |
| 卷号 | 443页码:39-46 |
| 关键词 | Aerogel SiO2 Amino-modification Adsorption Lead (II) |
| 英文摘要 | This work demonstrated a low-cost sol-gel and ambient drying process towards amino-modified SiO2 (SiO2-NH2) aerogels powders possessing high potential in recovering lead (II) ions from waste water, using industrial waterglass and 3-aminopropyl triethoxysilane (APTES) as the starting materials. Effects of the APTES/SiO2 molar ratio on the chemical composition and pore structure of SiO2-NH2 aerogel were investigated, and the Pb2+ adsorption properties were examined using the batch method. Results showed that the SiO2-NH2 aerogels via the ambient drying route possessed the BET surface area of 400-470 m(2)/g, pore volume of 1.4-1.8 ml/g, and average pore diameter of 12-16 nm. FTIR and chemical composition analysis confirmed the successful anchoring of the NH2 groups on the surface of SiO2 nanoparticles and the optimal APTES/SiO2 molar ratio was 0.21. The adsorption test showed that, at pH range of 4.0-6.0 and room temperature, the samples with the optimal APTES/SiO2 molar ratio of 0.21 exhibited relatively high adsorption capacity compared with the pure SiO2 aerogel and SiO2-NH2 aerogels with lower APTES/SiO2 molar ratio. An equilibrium adsorption time of 7 h was observed, fitting well with the pseudo second-order kinetic model, indicating that the chelating reaction between Pb2+ and anchored NH2 group was the rate-limiting step. The adsorption isotherm was well fitted by the Langmuir adsorption model, with the maximum adsorption capacity of 407.04 mg/g. The rapid adsorption test simulating the filter membrane with SiO2-NH2 aerogel adsorbent indicated the removal percentage of higher than 80% after 5 cycles. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Materials Science, Ceramics ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | SILICA AEROGEL ; DRUG-DELIVERY ; AQUEOUS-SOLUTIONS ; ADSORPTION ; REMOVAL ; IONS ; EQUILIBRIUM ; SYSTEMS ; PB(II) ; CO2 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000376838100006 |
| 源URL | [http://ir.sic.ac.cn/handle/331005/22995]  |
| 专题 | 上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文 |
| 作者单位 | Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Yu-Di,Gao, Xiang-Dong,Gu, Zheng-Ying,et al. Amino-terminated SiO2 aerogel towards highly-effective lead (II) adsorbent via the ambient drying process[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2016,443:39-46. |
| APA | Huang, Yu-Di,Gao, Xiang-Dong,Gu, Zheng-Ying,&Li, Xiao-Min.(2016).Amino-terminated SiO2 aerogel towards highly-effective lead (II) adsorbent via the ambient drying process.JOURNAL OF NON-CRYSTALLINE SOLIDS,443,39-46. |
| MLA | Huang, Yu-Di,et al."Amino-terminated SiO2 aerogel towards highly-effective lead (II) adsorbent via the ambient drying process".JOURNAL OF NON-CRYSTALLINE SOLIDS 443(2016):39-46. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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