Ultrahigh sorption and reduction of Cr(VI) by two novel core-shell composites combined with Fe3O4 and MoS2
Ultrahigh sorption and reduction of Cr(VI) by two novel core-shell composites combined with Fe3O4 and MoS2
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两种新型核壳复合材料结合 Fe3O4 和 MoS2 对 Cr(VI) 的超高吸附和还原
DOI：
10.1016/j.jhazmat.2019.120797
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发表时间：
2019
影响因子：
13.6
通讯作者：
Wang Xiangke
中科院分区：
文献类型：
--
作者：
Yang Shanye;Li Qian;Chen Liang;Chen Zhongshan;Pu Zengxin;Wang Huihui;Yu Shujun;Hu Baowei;Chen Jianrong;Wang Xiangke
本研究合成了两种新型磁性核壳Fe 3 O4@MoS2（F@M）和MoS2@Fe3 O 4（M@F）复合材料，并用于消除Cr（VI）。采用环境友好的制备方法制备了Fe 3 O 4和MoS 2复合材料。实验结果表明，F@M和M@F都具有较高的饱和磁化强度在pH 5.0和298 K时，对Cr（VI）的最大吸附容量分别为43.2 emu/g和49.9 emu/g（F@M为324.3 mg/g，M@F为290.2 mg/g），显着的Cr（VI）去除效率（F@M和M@F均可在90 min内达到Cr（VI）吸附平衡）和良好的再生性能（F@M和M@F的吸附能力在五个连续的吸附/解吸循环后略微降低）。Cr（VI）在F@M和M@F表面发生化学还原为Cr（III），硫和亚铁离子的协同还原使F@M成为一种优良的Cr（VI）去除材料。本文重点介绍了F@M和M@F作为潜在的，生态友好的和超高效率的Cr（VI）污染清除材料。
In this investigation, two novel magnetic core-shell Fe3O4@MoS2(F@M) and MoS2@Fe3O4(M@F) composites were synthesized and exploited for Cr(VI) elimination. Eco-friendly preparation methods were applied for the synthesis of Fe3O4and MoS2composites. The experimental results showed that both F@M and M@F have high saturation magnetization values (43.2 emu/g for F@M and 49.9 emu/g for M@F), excellent maximum sorption capacities of Cr(VI) at pH 5.0 and 298 K (324.3 mg/g for F@M, 290.2 mg/g for M@F), remarkable Cr(VI) removal efficiencies (Cr(VI) sorption equilibrium by both F@M and M@F can be reached in 90 min) and nice regeneration properties (the sorption capabilities of F@M and M@F decreased slightly after five consecutive sorption/desorption cycles). Chemical reduction of Cr(VI) to Cr(III) occurred on the surface of F@M and M@F, and the synergetic reduction of sulfur and ferrous ions made F@M an outstanding material for Cr(VI) removal. This paper highlights F@M and M@F as potential, eco-friendly and ultrahigh-efficiency materials for Cr(VI) pollution cleanup.