• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of King Saud University >Preparation and characterization of p–n heterojunction CuBi2O4/CeO2 and its photocatalytic activities under UVA light irradiation
【24h】

Preparation and characterization of p–n heterojunction CuBi2O4/CeO2 and its photocatalytic activities under UVA light irradiation

机译：p–n异质结CuBi 2 O 4 / CeO 2 及其在UVA光照射下的光催化活性

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

摘要

CuBi 2 O 4 /CeO 2 nanocomposites were synthesized by the solid state method and were characterized by a number of techniques such as X-ray diffraction, scanning electron microscopy and UV–Vis diffuse reflectance spectroscopy. The photocatalytic activity of the samples was investigated under UVA light and assessed using Congo red (CR) dye as probe reaction. The efficiency of the coupled CuBi 2 O 4 /CeO 2 photocatalyst was found to be related to the amount of added CuBi 2 O 4 and to the pH medium. The CuBi 2 O 4 /CeO 2 photocatalyst exhibited the high efficiency as a result of 83.05% of degradation of CR under UVA light for 100 min of irradiation time with 30 wt% of CuBi 2 O 4 at 25 °C and pH 7, which is about 6 times higher than that of CeO 2 . The photodegradation reactions satisfactorily correlated with the pseudo-first-order kinetic model. The mechanism of the enhanced photocatalytic efficiency was explained by the heterojunction model.
机译：CuBi 2 O 4 / CeO 2纳米复合材料是通过固态方法合成的，并通过多种技术进行了表征，例如X射线衍射，扫描电子显微镜和UV-Vis漫反射光谱。在紫外光下研究样品的光催化活性，并使用刚果红（CR）染料作为探针反应进行评估。发现偶联的CuBi 2 O 4 / CeO 2光催化剂的效率与添加的CuBi 2 O 4的量和pH介质有关。 CuBi 2 O 4 / CeO 2光催化剂显示出高效率，这是因为在25°C和pH值为7的条件下，UVA光下100％的CuBi 2 O 4辐照时间100分钟，CR的降解率为83.05％。是CeO 2的6倍左右。光降解反应与拟一级动力学模型令人满意地相关。异质结模型解释了提高光催化效率的机理。

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