期刊
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷 331, 期 9, 页码 3713-3722出版社
SPRINGER
DOI: 10.1007/s10967-022-08425-8
关键词
Molybdenum disulfide; Graphene oxide; Adsorption; Aqueous solution
资金
- Excellent Youth Project of Scientific Research Fund of Hunan Provincial Education Department [18B271, 19B504, 21B0440]
- Natural Science Foundation of Hunan Province [2021JJ40457]
In this study, a novel MoS2-GO composite material was prepared and used for U (VI) adsorption. The results showed that MoS2-GO had a higher specific surface area and exhibited excellent selectivity for U (VI), greatly enhancing its uranium uptake capability.
In this study, a novel adsorbents, molybdenum disulfide-graphene oxide (MoS2-GO) composites, is prepared by one-step hydrothermal method and used for U (VI) adsorption. SEM, XRD, FT-IR, BET and XPS results show that the MoS2 layers grow on the surface of graphene oxide layers, forming MoS2-GO composite structure. The specific surfaces area of MoS2-GO composite (5.5 m(2)/g) is higher than that of MoS2 (2.3 m(2)/g). Batch adsorption experiments indicate that the adsorption process of uranium (VI) on MoS2-GO conforms to the quasi-second-order kinetic model and the adsorption isotherm accords with Langmuir model. The maximum adsorption capacity calculated by Langmuir model is 136 mg center dot g(-1) at pH 5.0 and 298 K. Meanwhile, MoS2-rGO displays excellent selectivity for U (VI) in multicomponent metal ion solution. The increasement in specific surface area and the introduction of GO that rich in O-containing groups, provide more accessible binding sites for U (VI), which greatly enhance its uranium uptake capability. This work shows the potential of MoS2-GO as novel and promising materials in the efficient elimination of U (VI) from contaminated water and industrial effluents.
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