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 oxideCysteamineLead ionsAdsorption 基金项目:国家自然科学基金项目

作者	单位	E-mail
周方	中南大学化学化工学院 长沙 410083	346817616@qq.com
李琼	中南大学化学化工学院 长沙 410083
蒋新宇	中南大学化学化工学院 长沙 410083	jiangxinyu@csu.edu.cn

摘要点击次数:1903 全文下载次数:0 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. 查看全文查看/发表评论下载PDF阅读器 相关附件：版权转让声明书 -->