...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Self-assembly of CeO2 nanostructures/reduced graphene oxide composite aerogels for efficient photocatalytic degradation of organic pollutants in water
【24h】

Self-assembly of CeO2 nanostructures/reduced graphene oxide composite aerogels for efficient photocatalytic degradation of organic pollutants in water

机译：CeO2纳米结构/氧化石墨烯复合气凝胶的自组装，可有效光催化降解水中的有机污染物

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

Reduced graphene oxide aerogels (RGAs) are excellent candidates for water remediation due to their lightweight, high surface area and high absorbance rate. Here, we report a simple green synthetic approach for the self-assembly of CeO2-RGA aerogels using vitamin-C as the reducing agent. The photocatalytic degradation performance of the as-synthesized CeO2-RGA aerogels was studied as a function of simulated sunlight irradiation, using the organic dye Rhodamine-B (RhB) as a test molecule. The CeO2/RGA composites displayed highly enhanced photocatalytic activity in comparison to bare CeO2 nanostructures. This enhancement is ascribed to efficient charge transfer from the CeO2 nanostructures to the reduced graphene oxide (RGO) sheets due to the high degree of interconnectivity between the RGO and CeO2 nanostructures. In addition, photoluminescence studies strongly support this charge separation mechanism. The microstructures and optical properties of the as-synthesized nanostructures were characterized using HRTEM, XRD, FTIR, XPS and DRS. These results demonstrated that the CeO2 nanostructures are grown on interconnected three-dimensional RGO nanosheets. We believe that the findings of this study provide a versatile pathway to induce self-assembly of reduced graphene sheets with other semiconductor nanostructures in the form of lightweight aerogels for a variety of environmental applications. (C) 2016 Elsevier B.V. All rights reserved.
机译：还原的氧化石墨烯气凝胶（RGA）重量轻，表面积大，吸收率高，因此是水修复的极佳选择。在这里，我们报告了使用维生素C作为还原剂的CeO2-RGA气凝胶自组装的简单绿色合成方法。使用有机染料若丹明-B（RhB）作为测试分子，研究了合成的CeO2-RGA气凝胶的光催化降解性能与模拟阳光照射的关系。与裸露的CeO2纳米结构相比，CeO2 / RGA复合材料显示出高度增强的光催化活性。这种增强归因于由于RGO和CeO2纳米结构之间的高度互连性，从CeO2纳米结构到还原的氧化石墨烯（RGO）片的有效电荷转移。另外，光致发光研究强烈支持这种电荷分离机制。使用HRTEM，XRD，FTIR，XPS和DRS对合成后的纳米结构的微观结构和光学性质进行了表征。这些结果表明，CeO2纳米结构在互连的三维RGO纳米片上生长。我们相信，这项研究的发现提供了一种通用途径，可以诱导还原石墨烯片与其他半导体纳米结构以轻质气凝胶的形式自组装，从而适用于各种环境应用。 （C）2016 Elsevier B.V.保留所有权利。

著录项

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