• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Current Graphene Science >Graphene/Porous Beta TiO2 Nanocomposites Prepared Through a Simple Hydrothermal Method | Bentham Science
【24h】

Graphene/Porous Beta TiO2 Nanocomposites Prepared Through a Simple Hydrothermal Method | Bentham Science

机译：简单水热法制备石墨烯/多孔βTiO 2 纳米复合材料边沁科学

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Background: Despite recent advances in the construction of graphene/TiO2 hybrids withtunable structure and morphology, the synthesis of graphene/beta TiO2 nanocomposites with welldefinedmorphology remains a challenge.Objective: We report for the first time a novel array structure consisting of porous ultrathin beta TiO2nanosheets grown on few-layer graphene.Method: Pristine few-layer graphene (FLG) was first effectively exfoliated and dispersed in ethyleneglycol. Then porous beta TiO2 nanosheets were synthesized via one-step thermal hydrolysis of TiCl3,grown vertically on the surface of FLG stabilized by ethylene glycol at 150°C for 3 h.Results: The morphology and microstructure of these resulting graphene/beta TiO2 nanocompositeswere characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning and transmissionelectron microscopy, and N2 adsorption/desorption. High-resolution transmission electron microscopy(HRTEM) and N2 adsorption/desorption measurements illustrated the formation of mesopores withmean diameter of 3.8 nm in these TiO2 (B) nanosheets. XRD revealed that the presence of FLG playeda significant role in inhibiting the phase transformation of beta TiO2 to anatase during annealing at300oC for 1 h in air which otherwise occurs rapidly without FLG.Conclusion: In summary, we have presented a simple approach to synthesize graphene/porous betaTiO2 nanocomposites with tunable morphology. It is expected that this novel structure would be aninteresting photocatalyst for the conversion of solar energy to chemical fuels.
机译：背景：尽管最近在结构和形态可调的石墨烯/ TiO2杂化物的构建方面取得了进展，但具有良好形态的石墨烯/βTiO2纳米复合材料的合成仍然是一个挑战。目的：我们首次报道了一种由多孔超薄βTiO2方法：首先将原始的几层石墨烯（FLG）有效地剥离并分散在乙二醇中。然后一步法热水解TiCl3制备了多孔βTiO2纳米片，并在乙二醇稳定的FLG表面在150°C下垂直生长3 h。结果：表征了所得石墨烯/βTiO2纳米复合材料的形貌和微观结构。通过X射线衍射，X射线光电子能谱，扫描和透射电子显微镜以及N2吸附/解吸。高分辨率透射电子显微镜（HRTEM）和N2吸附/解吸测量结果表明，在这些TiO2（B）纳米片中平均直径为3.8 nm的中孔的形成。 XRD分析表明，FLG的存在在300oC的空气中退火1 h的过程中抑制了βTiO2向锐钛矿的相变起着重要作用，否则在没有FLG的情况下会迅速发生结论。具有可调形态的多孔βTiO2纳米复合材料。预期该新颖结构将是用于将太阳能转化为化学燃料的有趣的光催化剂。

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