吸附
纳米复合材料
水溶液
化学工程
X射线光电子能谱
化学
纳米颗粒
核化学
材料科学
纳米技术
有机化学
工程类
作者
Jiuyu Chen,Aotian Gu,Elvis Djam Miensah,Ying Liu,Peng Wang,Ping Mao,Chunhui Gong,Jiao Yan,Kai Chen,Zongxiang Zhang,Yi Yang
标识
DOI:10.1016/j.seppur.2021.118328
摘要
Iodide anion (I−) is one of the most-problematic radioactive nuclides in used nuclear fuel due to its intrinsic characteristics of a high toxicity and environmental mobility. Therefore, effective and selective elimination of I− from nuclear contaminated solution is highly beneficial for the pollution remediation purposes in the development of nuclear power, but is of significant challenge owing to the extreme conditions of the high acidity, strong ionizing radiation field and high concentration of competing anions. Herein, a novel core–shell [email protected]2O (ZC) encapsulated Ag nanoparticles (Ag NPs) nanocomposites have been fabricated via a facile one step self-assembly process and an environmentally friendly technique. The as-fabricated [email protected]@Cu2O (ZAC) nanocomposites were characterized and applied to capture of I− from aqueous solution. Adsorption studies revealed that the ternary nanocomposites showed fast removal kinetics, high photooxidation-adsorption capacity (up to 217.4 mg g−1 at pH = 3 for ZAC-2), satisfactory selectivity and high acidity resistance. Furthermore, the nanocomposites also exhibited a good reusability, as no significant change in the uptake capacity was observed even after five adsorption-regeneration cycles. Inspired by the superior features, a possible mechanism (chemical adsorption coupled with photooxidations) was proposed based on XRD, XPS and Raman spectra analysis for the pre- and post-adsorbed samples as well as the detailed adsorption experimental evidence.
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