...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of materials science >Hydrothermal synthesis of mesoporousTiO_2-ZnO nanocomposite for photocatalytic degradation of methylene blue under UV and visible light
【24h】

Hydrothermal synthesis of mesoporousTiO_2-ZnO nanocomposite for photocatalytic degradation of methylene blue under UV and visible light

机译：水热合成介孔TiO_2-ZnO纳米复合材料在紫外和可见光下光催化降解亚甲基蓝

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

Mesoporous ZnO–TiO~(2)was synthesized successfully by a one-step hydrothermal procedure using titanium sulfate and Zinc nitrate hexahydrate as precursors, and Pluronic P123 as a template. The prepared ZnO–TiO~(2)materials were heat treated at 400, 600, 800 and 1000 °C to remove the template and increase the degree of crystallization. Field emission scanning electron microscopy, wide angle X-ray diffraction, Fourier transformed infrared spectroscopy, transmission electron microscopy and N~(2)adsorption–desorption experiments were used to characterize the synthesized powders. Comparison photocatalytic investigations for the prepared materials and commercially available P25 were carried out under identical UV and visible light to understand the effect of the achieved phases and surface area on photocatalytic rate constant and percentage degradation. Results show that the sample which was heat treated at 800 °C (S-800) presents a very high performance under visible light and around 60% of the methylene blue (MB) solution can be degraded by this catalyst in spite of its low surface area. The high efficiency of this sample under visible light can be related to its high degree of crystallinity, formation of anatase and titanium–zinc oxide phases and interfacial coupling between ZnO and TiO~(2)nanoparticles.
机译：以硫酸钛和六水合硝酸锌为前体，以Pluronic P123为模板，通过一步水热法成功合成了介孔ZnO-TiO〜（2）。制备的ZnO–TiO〜（2）材料在400、600、800和1000°C进行热处理，以除去模板并增加结晶度。利用场发射扫描电子显微镜，广角X射线衍射，傅立叶变换红外光谱，透射电子显微镜和N〜（2）吸附-解吸实验对合成粉末进行了表征。在相同的紫外线和可见光下，对制得的材料和市售P25进行了比较光催化研究，以了解所获得的相和表面积对光催化速率常数和降解百分数的影响。结果表明，在800°C（S-800）热处理的样品在可见光下表现出非常高的性能，尽管该催化剂的表面较低，但仍有约60％的亚甲基蓝（MB）溶液可以被该催化剂降解区域。该样品在可见光下的高效率可能与其高结晶度，锐钛矿和钛-氧化锌相的形成以及ZnO和TiO〜（2）纳米颗粒之间的界面耦合有关。

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