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辐射法制备还原氧化石墨烯复合气凝胶及其对有机污染物的吸附性能研究
Preparation of reduced graphene oxide composite aerogel by radiation method and its adsorption performance of organic pollutants
【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。
【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.
- 【会议录名称】 中国核科学技术进展报告(第七卷)——中国核学会2021年学术年会论文集第7册(同位素分卷、辐射研究与应用分卷、核技术工业应用分卷、核农学分卷、辐照效应分卷、放射性药物分卷)
- 【会议名称】中国核学会2021年学术年会
- 【会议时间】2021-10-19
- 【会议地点】中国山东烟台
- 【分类号】TQ427.26;TQ24;X703
- 【主办单位】中国核学会