• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Sol-gel based simonkolleite nanopetals with SnO2 nanoparticles in graphite-like amorphous carbon as an efficient and reusable photocatalyst
【24h】

Sol-gel based simonkolleite nanopetals with SnO2 nanoparticles in graphite-like amorphous carbon as an efficient and reusable photocatalyst

机译：基于溶胶 - 凝胶的Simonkolleite Nanpetals，SnO2纳米粒子在石墨类无定形碳中，作为一种有效且可重复使用的光催化剂

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

We report a new sol-gel nanocomposite (STC) having simonkolleite nanopetals (SC) and quasi-spherical tin oxide (SO) nanoparticles embedded in graphite-like amorphous carbon (C) as an efficient and reusable photocatalyst for the degradation of rhodamine 6G dye under UV (254 nm) illumination. The STC was synthesized using vacuum curing (450 degrees C) of precursor gel derived from a sol (Zn : Sn, 2 : 1) in 2-methoxyethanol with acetylacetone. The presence of tetragonal SO well decorated on rhombohedral SC forming nanoheterostructures in the carbon matrix was identified by X-ray diffraction, micro-Raman and X-ray photoelectron spectroscopy and electron microscopes (field emission scanning electron and transmission electron) studies. Carbon content and thermal weight loss behaviour in STC were studied by carbon determinator and thermogravimetry. The nanocomposite showed high photocatalytic activity (10(-5) M dye solution degraded completely in 32 min). Reusability test of the photocatalyst exhibited about 95% of dye degradation after five successive recycles. In addition to accelerating photo-induced charge carrier separation and electron transport in the nanoheterostructures as revealed from electrochemical impedance spectroscopy response of the UV-exposed nanocomposite, an active role of the carbon at an optimum content (similar to 18%) was found for generating high BET specific surface area (similar to 143 m(2) g(-1)). This simple synthesis strategy could open a new avenue to the development of sol-gel nanocomposites as efficient and reusable photocatalysts from various simonkolleite-based metal oxide semiconductors embedded in graphite-like amorphous carbon.
机译：我们将具有型硅胶纳米菌（SC）和嵌入石墨的无定形碳（C）中的含有Simonkolleite NaNopetals（SC）和准球形氧化物（SO）纳米颗粒的新型溶胶 - 凝胶纳米复合材料（SO）纳米颗粒作为罗丹明6g染料的降解的有效和可重复使用的光催化剂在紫外线（254nm）照明下。使用衍生自2-甲氧基乙醇的溶胶（Zn：Sn，2：1）的前体凝胶的真空固化（450℃）合成STC，用乙酰丙酮在2-甲氧基乙醇中获得。通过X射线衍射，微拉曼和X射线光电子谱和电子显微镜（场发射扫描电子和透射电子）研究，鉴定了在碳基质中的rhombohedral SC形成纳米能结构的四边形粗糙的存在。通过碳测定器和热重试验研究STC中的碳含量和热量损失行为。纳米复合材料显示出高光催化活性（10（-5）M染料溶液在32分钟内完全降解）。光催化剂的可重用性试验在五次连续回收后显示出约95％的染料降解。除了从UV暴露的纳米复合材料的电化学阻抗光谱响应的电化​​学阻抗光谱响应显示的纳米能谱中加速光诱导的电荷载体分离和电子传输，还发现碳在最佳含量（类似于18％）的积极作用高投注比表面积（类似于143μm（2）g（-1））。这种简单的合成策略可以为溶胶 - 凝胶纳米复合材料开发新的途径，作为来自嵌入在石墨类非晶碳中的各种西蒙古特的金属氧化物半导体中的有效和可重复使用的光催化剂。

著录项

  • 来源
    《RSC Advances》 |2015年第92期|共13页
  • 作者

    Pal Moumita; Bera Susanta; Jana Sunirmal;

  • 作者单位

    CSIR CGCRI Sol Gel Div Kolkata 700032 India;

    CSIR CGCRI Sol Gel Div Kolkata 700032 India;

    CSIR CGCRI Sol Gel Div Kolkata 700032 India;

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

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