期刊
POLYMER
卷 51, 期 26, 页码 6193-6202出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2010.10.052
关键词
Melamine-based polymer; Schiff base chemistry; Mercury
资金
- National Natural Science Foundation of China [20975042]
- Program for Academic Pacesetter of Wuhan [200851430484]
- Nature Science Foundation Key Project from Hubei Province of China [2008CDA080]
- International Science and Technology Cooperation and Exchange Foundation [2008DFA40270]
Based on a facile catalyst-free process using Schiff base chemistry, here, highly cross-linked porous aminal networks in high yields (up to 90%) were rapidly prepared via microwave irradiation. The polymer networks contained as high as 50 wt% of nitrogen (N), in situ doped with sulfur (S), with specific surface areas of up to 301 m(2) g(-1), and were also found to exhibit a solvent-based luminescence property. Adsorption kinetics and isotherm studies demonstrated that the Hg2+ removal by these polymers was extremely rapid (90% being attained within 5 min for a 400 mg L-1 Hg2+ solution) and highly efficient (up to 1172 mg g(-1)). Particularly these materials also exhibited an excellent selectivity towards Hg2+ over other interfering ions (Cd2+, Ni2+, Zn2+, Cu2+, Co2+, Ca2+, Mn2+ and Mg2+). Studies by FT-IR, Raman and XPS spectra showed that all the N-containing groups (triazine ring, primary amine, and secondary amine) as well as S-containing groups on the polymer matrix could be responsible for the Hg adsorption, through the mechanism of surface complexation. (C) 2010 Elsevier Ltd. All rights reserved.
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