CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR China.
School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, PR China.
J Colloid Interface Sci. 2018 Jan 15;510:280-291. doi: 10.1016/j.jcis.2017.09.073. Epub 2017 Sep 21.
AgO nanoparticles anchored on the Mg(OH) nanoplates (AgO@Mg(OH)) were successfully prepared by a facile one-step method, which combined the Mg(OH) formation with AgO deposition. The synthesized products were characterized by a wide range of techniques including powder X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), and nitrogen physisorption analysis. It was found that AgO nanoparticles anchored on the Mg(OH) nanoplates show good dispersion and less aggregation relative to the single AgO nanoaggregates. In addition, iodide (I) removal by the AgO@Mg(OH) nanocomposite was studied systematically. Batch experiments reveal that the nanocomposite exhibits extremely high I removal rate (<10min), and I removal capacity is barely affected by the concurrent anions, such as Cl, SO, CO and NO. Furthermore, I and UO could be simultaneously removed by the nanocomposite with high efficiency. Due to the simple synthetic procedure, the excellent removal performances for iodine and uranium, and the easy separation from water, the AgO@Mg(OH) nanocomposite has real potential for application in radioactive wastewater treatment, especially during episodic environmental crisis.
AgO 纳米颗粒锚定在 Mg(OH)纳米板上（AgO@Mg(OH)）通过一种简便的一步法成功制备，该方法将 Mg(OH)的形成与 AgO 的沉积结合在一起。所合成的产物通过多种技术进行了表征，包括粉末 X 射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、透射电子显微镜（TEM）、选区电子衍射（SAED）和氮气物理吸附分析。结果发现，AgO 纳米颗粒锚定在 Mg(OH)纳米板上相对于单一的 AgO 纳米聚集体表现出良好的分散性和较少的聚集。此外，系统研究了 AgO@Mg(OH)纳米复合材料对碘化物（I）的去除。批量实验表明，该纳米复合材料具有极高的 I 去除率（<10min），I 去除容量几乎不受共存阴离子（如 Cl、SO、CO 和 NO）的影响。此外，该纳米复合材料可以高效地同时去除碘和铀。由于其合成方法简单、对碘和铀的去除性能优异以及易于从水中分离，AgO@Mg(OH)纳米复合材料在放射性废水处理中具有实际应用潜力，特别是在突发环境危机期间。
