...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Catalysts >Synthesis, Characterization of g-C 3 N 4 /SrTiO 3 Heterojunctions and Photocatalytic Activity for Organic Pollutants Degradation
【24h】

Synthesis, Characterization of g-C 3 N 4 /SrTiO 3 Heterojunctions and Photocatalytic Activity for Organic Pollutants Degradation

机译：g-C 3 N 4 / SrTiO 3异质结的合成，表征及对有机污染物降解的光催化活性

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

摘要

Perovskite-structure SrTiO 3 (STO) and graphitic carbon nitride (g-C 3 N 4 , CN) have attracted considerable attention in photocatalytic technology due to their unique properties, but also suffer from some drawbacks. The development of composite photocatalysts that combine properties of the individual semiconductors with enhanced charge separation is the current major trend in the photocatalysis field. In this study, SrTiO 3 /g-C 3 N 4 (CNSTO) composites with different ratios (10, 20, 30, 40 and 50% g-C 3 N 4 ) were prepared with a sonication mixing method. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), N 2 porosimetry, Fourrier transform infra-red spectroscopy (FT-IR), UV-Vis diffuse reflectance (DRS) and dynamic light scattering (DLS). STO spherical particles were successfully loaded on the g-C 3 N 4 planes forming heterojunction composite materials. The photocatalytic activity was tested against the degradation of methylene blue (MB) dye under simulated solar light (SSL) irradiation following first-order kinetics. The photocatalytic activity followed the trend: 20CNSTO 30CNSTO 40CNSTO 50CNSTO ≈ 10CNSTO, in accordance with the amount of ? OH radicals determined by fluorescence spectroscopy. A Z-scheme mechanism was proposed for the enhanced photocatalytic degradation of MB as evidenced by trapping experiments with scavengers. Finally, significant stability and reusability was exhibited, indicating that such composites are of potential interest for photocatalytic treatments under sunlight irradiation.
机译：钙钛矿结构的SrTiO 3（STO）和石墨碳氮化物（g-C 3 N 4，CN）由于其独特的性能而在光催化技术中引起了极大的关注，但也存在一些缺点。将各个半导体的特性与增强的电荷分离相结合的复合光催化剂的开发是光催化领域的当前主要趋势。在本研究中，采用超声混合法制备了不同比例（10、20、30、40和50％g-C 3 N 4）的SrTiO 3 / g-C 3 N 4（CNSTO）复合材料。样品通过X射线衍射（XRD），扫描电子显微镜（SEM），N 2孔隙率法，傅里叶变换红外光谱（FT-IR），UV-Vis漫反射率（DRS）和动态光散射（DLS）进行表征）。将STO球形颗粒成功加载到g-C 3 N 4平面上，形成异质结复合材料。按照一级动力学，在模拟太阳光（SSL）照射下测试了光催化活性对亚甲基蓝（MB）染料降解的影响。光催化活性遵循以下趋势：20CNSTO> 30CNSTO> 40CNSTO> 50CNSTO≈10CNSTO，根据？的量而定。通过荧光光谱法测定OH基。提出了一种Z方案机制，用于提高MB的光催化降解能力，这是由清除剂进行的捕集实验所证明的。最后，显示出显着的稳定性和可重复使用性，表明这种复合材料对于日光照射下的光催化处理具有潜在的兴趣。

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