多巴胺功能化单宁酸模板介孔硅纳米粒子作为一种新型吸附剂，用于从水溶液中高效去除 Cu。

Dopamine functionalized tannic-acid-templated mesoporous silica nanoparticles as a new sorbent for the efficient removal of Cu from aqueous solution.

机构信息

School of Port and Transportation Engineering, Zhejiang Ocean University, Zhoushan 316022, China.

School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin, 300130, China.

出版信息

Sci Rep. 2017 Mar 22;7:45215. doi: 10.1038/srep45215.

A simple, environmentally friendly and cost-effective nonsurfactant template method was used to synthesize tannic-acid-templated mesoporous silica nanoparticles (TMSNs), and then dopamine functionalized TMSNs (Dop-TMSNs) which was synthesized by a facile and biomimetic coating strategy, was developed as a new sorbent for the removal of Cu from aqueous solution. The Dop-TMSNs were thoroughly characterized by SEM, TEM, BET, FT-IR and TGA, and the effects of contact time, initial pH, K and Na concentrations, co-existing polyvalent metal ions and adsorption-desorption cycle times on the sorption capacity of Dop-TMSNs were studied. It was demonstrated that the maximum adsorption capacity of Cu by Dop-TMSNs was 58.7 mg/g at pH 5.5, and the sorption reached equilibrium within 180 min. Moreover, the K and Na concentrations had a very slight influence on the sorption process and the adsorption capacity of the Dop-TMSNs still remained 89.2% after recycling for four times. All the results indicated that the Dop-TMSNs could be utilized as an excellent sorbent for the sequestration of Cu.

一种简单、环保且经济高效的非表面活性剂模板法被用于合成没食子酸模板的介孔硅纳米粒子（TMSNs），然后通过简便且仿生的涂层策略合成多巴胺功能化的 TMSNs（Dop-TMSNs），作为一种从水溶液中去除 Cu 的新型吸附剂。Dop-TMSNs 通过 SEM、TEM、BET、FT-IR 和 TGA 进行了彻底的表征，并研究了接触时间、初始 pH 值、K 和 Na 浓度、共存多价金属离子和吸附-解吸循环次数对 Dop-TMSNs 吸附容量的影响。结果表明，Dop-TMSNs 在 pH 5.5 时对 Cu 的最大吸附容量为 58.7 mg/g，吸附在 180 min 内达到平衡。此外，K 和 Na 浓度对吸附过程的影响非常小，Dop-TMSNs 经过四次循环后仍保持 89.2%的吸附容量。所有结果表明，Dop-TMSNs 可用作一种用于螯合 Cu 的优良吸附剂。