Effective adsorption and collection of cesium from aqueous solution using graphene oxide grown on porous alumina
Effective adsorption and collection of cesium from aqueous solution using graphene oxide grown on porous alumina
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DOI：
10.7567/jjap.57.04fp04
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发表时间：
2018-02
影响因子：
1.5
通讯作者：
S. Entani;M. Honda;I. Shimoyama;Songtian Li;H. Naramoto;T. Yaita;S. Sakai
中科院分区：
文献类型：
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作者：
S. Entani;M. Honda;I. Shimoyama;Songtian Li;H. Naramoto;T. Yaita;S. Sakai
采用化学气相沉积法将氧化石墨烯直接生长在多孔氧化铝表面，合成了具有大表面积的氧化石墨烯（GO），研究了其在水溶液中的Cs吸附机理。采用原位近边x射线吸收精细结构光谱和x射线光电子能谱测量的电子结构分析澄清了水溶液中氧化石墨烯上的Cs原子通过氧官能团键合。氧化石墨烯/多孔氧化铝对铯的吸附量高达650 ~ 850 mg g−1，表明氧化石墨烯/多孔氧化铝是一种有效的吸附剂，对放射性核素具有较高的吸附效率。
Graphene oxide (GO) with a large surface area was synthesized by the direct growth of GO on porous alumina using chemical vapor deposition to study the Cs adsorption mechanism in aqueous solutions. Electronic structure analysis employing in situ near-edge X-ray absorption fine structure spectroscopy and X-ray photoelectron spectroscopy measurements clarifies the Cs atoms bond via oxygen functional groups on GO in the aqueous solution. The Cs adsorption capacity was found to be as high as 650–850 mg g−1, which indicates that the GO/porous alumina acts as an effective adsorbent with high adsorption efficiency for radioactive nuclides in aqueous solutions.