• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >Effect of oxidation degree on the synthesis and adsorption property of magnetite/graphene nanocomposites
【24h】

Effect of oxidation degree on the synthesis and adsorption property of magnetite/graphene nanocomposites

机译：氧化程度对磁铁矿/石墨烯纳米复合材料合成及吸附性能的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A facile approach is demonstrated to synthesize a series of magnetite/graphene nanocomposites by solvothermal method, which can be easily collected after removal of pollutants without secondary pollution of graphene powders. Raman and FT-IR analyses show that the reduction of the mixing vapor of ammonia and hydrazine at different reaction periods generates the discrepancy of oxidation degree for reduced graphene oxide (rGO), which can be kept after the solvothermal synthesis of Fe3O4/rGO nanocomposites. Batch adsorption experiments indicate that the nanocomposite with maximum oxidation degree of rGO presents the largest magnetization of 35.4 emu g(-1) and adsorption capacity of 59.2 mg g(-1) for Cu2+, while the one with minimum oxidation degree exhibits the strongest adsorption of 39.0 mg g(-1) for methylene blue accompanied with appropriate magnetization of 9.0 emu g(-1), and only 23% of initial capacity was lost after seven recycling use. The adsorption kinetics of the both composites follows the pseudo-second-order model, suggestive of physical and chemical interactions between the pollutants and adsorbent. The results suggest that the oxidation degree of the rGO substrate can apparently influence both the structure and the adsorbing behavior of Fe3O4/rGO nanocomposites, which allows the control over the adsorbent performance according to the pollutant of interest. (C) 2015 Elsevier B.V. All rights reserved.
机译：通过溶剂热法证明了一种简便的方法可以合成一系列磁铁矿/石墨烯纳米复合材料，去除污染物后可以很容易地将其收集起来，而不会对石墨烯粉末造成二次污染。拉曼光谱和FT-IR分析表明，氨水和肼的混合蒸气在不同反应时期的还原会产生还原性氧化石墨烯（rGO）的氧化度差异，在溶剂热合成Fe3O4 / rGO纳米复合材料后可以保持这种差异。批量吸附实验表明，rGO氧化度最大的纳米复合材料对Cu2 +的最大磁化强度为35.4 emu g（-1），对Cu2 +的吸附容量为59.2 mg g（-1），而氧化度最小的纳米复合材料表现出最强的吸附性亚甲基蓝的39.0 mg g（-1）的磁化强度以及9.0 emu g（-1）的适当磁化强度，经过7次循环使用后仅损失了23％的初始容量。两种复合材料的吸附动力学遵循伪二级模型，表明污染物与吸附剂之间的物理和化学相互作用。结果表明，rGO底物的氧化程度可以明显影响Fe3O4 / rGO纳米复合材料的结构和吸附行为，从而可以根据目标污染物控制吸附剂的性能。 （C）2015 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Applied Surface Science》 |2015年第30期|188-195|共8页
  • 作者

    Luo Kun; Mu Yuanying; Wang Peng; Liu Xiaoteng;

  • 作者单位

    Guilin Univ Technol, Coll Mat Sci & Engn, Guangxi Key Lab Univ Clean Met & Comprehens Utili, Guilin 541004, Peoples R China;

    Guilin Univ Technol, Coll Mat Sci & Engn, Guangxi Key Lab Univ Clean Met & Comprehens Utili, Guilin 541004, Peoples R China;

    Guilin Univ Technol, Coll Mat Sci & Engn, Guangxi Key Lab Univ Clean Met & Comprehens Utili, Guilin 541004, Peoples R China;

    Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nanocomposite; Magnetite; Graphene; Oxidation degree; Adsorptiona;

    机译：纳米复合材料;磁铁矿;石墨烯;氧化度;吸附性;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号