School of Chemistry, College of Science, University of Tehran, Tehran 11155-4563, Iran.
School of Chemistry, College of Science, University of Tehran, Tehran 11155-4563, Iran.
J Colloid Interface Sci. 2018 Oct 1;527:57-67. doi: 10.1016/j.jcis.2018.05.018. Epub 2018 May 12.
A novel approach was examined by addition of amine-modified reduced graphene oxide (rGO) to amine solutions in order to enhance the CO absorption capacity of amine solutions. Amine functionalized reduced graphene oxide (rGO)/methyl diethanolamine (MDEA) nanofluid was prepared for absorption of acid gases (CO, HS). GO was synthesized via a modified hummer method and functionalized through solvothermal method. As-synthesized NH-rGO was characterized by XRD, BET, SEM, FTIR, EDX and XPS analysis to determine the structure. NH-rGO was dispersed in MDEA and displayed excellent stability verified by zeta potential analysis. NH-rGO/MDEA nanofluid showed high absorption capacity toward CO and HS. The absorption capacity of the solution for CO and HS was promoted up to 16.2% and 17.7%, respectively. Solubility results showed a reverse relationship with increasing temperature. Comparison of solubility data revealed that introducing 0.1 wt% NH-rGO to 40 wt% had a greater enhancement relative to introducing 0.1 wt% GO to the same solution.
研究了一种新方法，即在胺溶液中添加胺改性还原氧化石墨烯（rGO），以提高胺溶液的 CO 吸收能力。为了吸收酸性气体（CO、HS），制备了胺功能化还原氧化石墨烯（rGO）/甲基二乙醇胺（MDEA）纳米流体。GO 通过改进的 Hummer 法合成，并通过溶剂热法进行功能化。通过 XRD、BET、SEM、FTIR、EDX 和 XPS 分析对合成的 NH-rGO 进行了结构表征。NH-rGO 在 MDEA 中分散，并通过zeta 电位分析验证了其优异的稳定性。NH-rGO/MDEA 纳米流体对 CO 和 HS 具有高吸收能力。溶液对 CO 和 HS 的吸收能力分别提高了 16.2%和 17.7%。溶解度结果表明，随着温度的升高呈相反的关系。与向相同溶液中添加 0.1wt%GO 相比，引入 0.1wt%NH-rGO 可使 40wt%的溶解度提高更大。
