【作者】 张鹏； 陈怡志； 翁汉钦； 林铭章；

【Author】 ZHANG Peng;CHEN Yi-zhi;WENG Han-qin;LIN Ming-zhang;School of Nuclear Science and Technology, University of Science and Technology of China;

【机构】 中国科学技术大学核科学技术学院；

【摘要】 作为一种比表面积超大的多孔材料,还原氧化石墨烯（r GO）气凝胶在有机污染物去除领域有巨大的应用前景。本工作利用γ射线辐照含有Eu³⁺与氧化石墨烯（GO）的醇-水混合溶液,通过辐射还原制备了rGO-Eu复合气凝胶。Eu3+的引入可促进凝胶的形成,降低辐射法制备凝胶所需的吸收剂量并拓宽其制备的p H范围。Eu³⁺可以有效调控r GO气凝胶的孔结构和还原程度。此类rGO-Eu复合气凝胶对有机溶剂和有机染料具有优异的吸附性能,对氯仿和依来铬黑T的吸附容量最高分别达386 g g^-1和1300 mg g^-1。此外,rGO-Eu复合气凝胶独特的荧光性质还可实现吸附过程中对污染物的原位检测。本研究表明Eu³⁺对合成具有优异吸附性能的还原氧化石墨烯复合气凝胶具有重要作用。更多还原

【Abstract】 Reduced graphene oxide（rGO） aerogel has the large specific surface area and has great application potential for decontamination of organic pollutants. In this study, γ-ray irradiation was used to irradiate the aqueous solutions containing Eu³⁺ and graphene oxide（GO）, making GO self-assemble into composite aerogel under cross-linking by Eu³⁺ during the reduction process. This work explored the effects of p H, absorbed dose and Eu³⁺ concentration on composite aerogel, and studied the adsorption performance of organic dyes and organic solvents on composite aerogel. The results show that Eu³⁺ can broaden the p H range of gel formation and reduce the required absorbed dose. In addition, Eu³⁺ can effectively regulate the pore structure and reduction degree of rGO aerogel, and endow aerogel with fluorescence. The composite aerogel has excellent adsorption performance for organic solvents and organic dyes, for example the adsorption capacity of chloroform and Eriochrome Black T are as high as 386 g g^-1 and 1300 mg g^-1,respectively. The fluorescence can also be used for detection and adsorption of pollutants simultaneously.This study shows that Eu³⁺ plays an important role in the synthesis of rGO composite aerogels with excellent adsorption properties.更多还原