...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hazardous Materials >Understanding the adsorptive and photoactivity properties of Ag-graphene oxide nanocomposites
【24h】

Understanding the adsorptive and photoactivity properties of Ag-graphene oxide nanocomposites

机译：了解Ag-石墨烯氧化物纳米复合材料的吸附和光活性

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

Nanocomposites of graphene oxide (GO) and silver nanoparticles (AgNPs) were synthetized using a practical photochemical silver functionalization. Their photocatalytic activities were evaluated with two dyes, Rhodamine B and Indigo Carmine, under visible-light irradiation. The prepared nanocomposites were characterized by HRTEM, FESEM, XRD, Raman, FTIR and UV-vis absorption spectroscopy. These nanocomposites present new defect domains of sp~3 type in combination with several graphitic functional groups that act as nucleation sites for anchoring AgNPs, while the sp~2-sp~3 edge defects domains of GO generate the photoactivity. Furthermore, their photocatalytic performances are governed by their large adsorption capacity, and strong interaction with dye chromophores. A comprehensive photocatalytic way underlying the importance of adsorption is suggested to explain the low visible-light responsive photoactivity of the AgNPs-GO nanocomposites and the possible binding-site saturation. Then, the usage of H_2SO_4 allows the production of ionic species and helps to confirm the strong adsorption of both dyes. The ability to synthesize AgNPs-GO nanocomposites with extensive adsorptive capacity is certainly of interest for the efficient removal of hazardous materials.
机译：使用实用的光化学银官能化合成了氧化石墨烯（GO）和银纳米颗粒（AgNPs）的纳米复合材料。在可见光照射下，用若丹明B和靛蓝胭脂红这两种染料评估了它们的光催化活性。通过HRTEM，FESEM，XRD，拉曼，FTIR和紫外可见吸收光谱对制备的纳米复合材料进行了表征。这些纳米复合材料呈现出新的sp〜3型缺陷域，与几个石墨官能团结合，这些石墨官能团充当锚定AgNP的成核位点，而GO的sp〜2-sp〜3边缘缺陷域则产生光活性。此外，它们的光催化性能取决于它们的大吸附容量以及与染料生色团的强相互作用。建议采用一种全面的光催化方法来说明吸附的重要性，以解释AgNPs-GO纳米复合材料的低可见光响应光活性和可能的​​结合位点饱和。然后，使用H_2SO_4可以产生离子物质，并有助于确认两种染料的强吸附性。合成具有广泛吸附能力的AgNPs-GO纳米复合材料的能力无疑是有效去除有害物质的兴趣所在。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2013年第1期|52-60|共9页
  • 作者

    R.D.Martinez-Orozco; H.C. Rosu; Soo-Wohn Lee; V. Rodriguez-Gonzalez;

  • 作者单位

    Division de Materiales Avanzados, Instituto Potosino de Investigation Cientifica y Tecnoldgica, Camino a la Presa San Jose 2055, Col. Lomas 4a. section, C.P. 78216 San Luis Potosi, S.L.P., Mexico;

    Division de Materiales Avanzados, Instituto Potosino de Investigation Cientifica y Tecnoldgica, Camino a la Presa San Jose 2055, Col. Lomas 4a. section, C.P. 78216 San Luis Potosi, S.L.P., Mexico;

    Department of Environmental Engineering, Sun Moon University, Asan, Republic of Korea;

    Division de Materiales Avanzados, Instituto Potosino de Investigation Cientifica y Tecnoldgica, Camino a la Presa San Jose 2055, Col. Lomas 4a. section, C.P. 78216 San Luis Potosi, S.L.P., Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Graphene-based nanocomposites; RhB binding-site saturation; Silver nanoparticles; Graphene adsorption capacity; Graphene oxide sp~3 defects; Strong adsorption;

    机译：石墨烯基纳米复合材料;RhB结合位点饱和;银纳米颗粒;石墨烯的吸附能力;氧化石墨烯sp〜3缺陷;吸附力强;

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