Dopamine functionalized tannicacid-templated mesoporous silica nanoparticles as a new sorbent for the efficient removal of Cu2+ from aqueous solution

作者：Gao, Junkai; Lei, Hao; Han, Zhi; Shi, Qian; Chen, Yan^*; Jiang, Yanjun^*

来源：Scientific Reports, 2017, 7(1): 45215.

DOI：10.1038/srep45215

• HEAVY-METAL IONS
• SELECTIVE ADSORPTION
• COPPER REMOVAL
• SBA-15
• WATER
• ACID
• CU(II)

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 Cu2+ 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 Cu2+ 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 Cu2+.

• 出版日期2017-3-22
• 单位浙江海洋大学; 河北工业大学