| 周方,李琼,蒋新宇.化学通报,2017,80(4):361-366. |
| 巯基化石墨烯对水中Pb(Ⅱ)的吸附性能研究 |
| Removal of Pb(Ⅱ) ions from aqueous solutions by thiol-functionalized graphene oxide |
| 投稿时间：2016-09-01 修订日期：2016-11-14 |
| DOI： |
| 中文关键词: 氧化石墨烯 巯基乙胺 二价铅 吸附 |
| 英文关键词:Graphene oxide Cysteamine Lead ions Adsorption |
| 基金项目:国家自然科学基金项目 |
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| 摘要点击次数: 2589 |
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| 中文摘要: |
| 采用改进的Hummers法制备氧化石墨烯(GO),在交联剂EDC作用下,巯基乙胺与氧化石墨烯上的羧基进行缩合反应,合成巯基化石墨烯 (GO-SH)。运用FTIR、SEM及XPS等手段对合成材料进行表征,结果表明：巯基乙胺成功接枝在氧化石墨烯表面。将巯基化石墨烯用于吸附去除水中的Pb(Ⅱ),吸附实验表明,合成的巯基化石墨烯对Pb(Ⅱ)的吸附效果好,吸附量高达205.25mg/g。吸附动力学遵循准二级模型,且等温吸附数据用Langmuir吸附等温线拟合得很好。巯基化石墨烯对废水处理和净化有很大的潜在应用。 |
| 英文摘要: |
| The graphite oxide samples were prepared via modified Hummers method. Thiol-functionalized graphene oxide (GO-SH) was synthesized via condensation reaction of cysteamine and graphene oxide. GO-SH was structurally characterized by various spectral techniques like Fourier infrared (FT-IR), Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) analysis. Characterization results indicated that cysteamine has been successfully grafted on the surface of graphite oxide. And then the synthesized GO-SH was used to simulate the adsorption of Pb(Ⅱ) in aqueous solution. Under the optimization conditions, GO-SH exhibited high adsorption capacity for Pb(Ⅱ) in a short time, and the maximum adsorption capacity was 205.25 mg/g. The adsorption isotherms and kinetics of Pb (Ⅱ) by GO-SH matched well with the Langmuir isotherm model and pseudo-second-order equation. Therefore, the GO-SH could be regarded as a potential adsorbent for wastewater treatment and purification processes. |
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