Three-dimensional molybdenum disulfide/graphene hydrogel with tunable heterointerfaces for high selective Hg(II) scavenging
| Autor: | Dan-Hua Wang, Yong-Liang Yu, Jian-Hua Wang, Yu-Ting Zhuang, Xiao Zhang |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Graphene Diffusion Oxide 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Ion Biomaterials Partition coefficient chemistry.chemical_compound Colloid and Surface Chemistry Adsorption chemistry Chemical engineering law 0210 nano-technology Selectivity Molybdenum disulfide |
| Zdroj: | Journal of colloid and interface science. 514 |
| ISSN: | 1095-7103 |
| Popis: | A hierarchical and hybridized hydrogel with rational structure and composition as adsorbent possesses a series of distinct advantages, e.g., fast ion diffusion, high selectivity and good stability. Herein, a novel three-dimensional (3D) molybdenum disulfide (MoS2)-reduced graphene oxide (rGO) hydrogel with two-dimensional heterointerfaces is fabricated by an eco-friendly one-pot hydrothermal method. The heterointerfacial area could be readily tuned by the regulation of MoS2/rGO ratio, in order to improve the adsorption capacity and selectivity. The 3D MoS2-rGO hydrogel with 70 wt% MoS2 shows high selectivity for Hg(II) ions, with a distribution coefficient value (Kd) of 7.49 × 106 mL g−1 even in the presence of other coexisting ions. More attractively, the free-standing and flexible 3D MoS2-rGO hydrogel can be used as a column-packed device, providing an efficient pathway for the fast removal of 80 mg L−1 Hg(II) within 7 min to achieve a tolerable concentration of |
| Databáze: | OpenAIRE |
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