• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Rational fabrication of a graphitic-C3N4/Sr2KNb5O15 nanorod composite with enhanced visible-light photoactivity for degradation of methylene blue and hydrogen production
【24h】

Rational fabrication of a graphitic-C3N4/Sr2KNb5O15 nanorod composite with enhanced visible-light photoactivity for degradation of methylene blue and hydrogen production

机译：合理制造石墨化的C 3 N 4 / Sr 2 KNb 5 O 15 具有增强的可见光光活性的纳米棒复合材料，用于降解亚甲基蓝和产生氢气

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

摘要

A g-C3N4/Sr2KNb5O15 nanorod composite photocatalyst was simply prepared by direct growth of graphitic C3N4 on one-dimensional Sr2KNb5O15 nanorods and evaluated by degradation of methylene blue (MB) and water splitting for H2 production under visible light irradiation. By coupling g-C3N4 and Sr2KNb5O15 nanorods, the nanocomposite with an optimal 77?wt% g-C3N4 exhibited 6.2 times higher activity for photodegradation than the bare g-C3N4 and the increase in H2 production rate from an aqueous methanolic solution reached up to 12.1 fold after appropriate photodeposition of 0.03 wt% Rh cocatalysts. Furthermore, a comparative study on the preparation methods shows the photodegradation rate of the nanocomposite prepared by the direct growth method was found to be 3.4 times higher than those formed just by physical mixing. The results demonstrate the importance of the formation of proper nano-interfaces in the nanocomposite. Combined with theoretical prediction of the band structures, a possible mechanism is thus proposed including the formation of proper interfaces between g-C3N4 and Sr2KNb5O15 by direct growth approachs promoting spatial separation of photoinduced electron–hole pairs.
机译：一个gC 3 N 4 / Sr 2 KNb 5 O 15 纳米棒复合光催化剂的制备方法是直接生长石墨碳C 一维Sr 2 KNb <上的3 N 4 sub> 5 O 15 纳米棒，并通过亚甲基蓝（MB）的降解和H 2的水分解来评估 在可见光照射下产生。通过耦合gC 3 N 4 和Sr 2 KNb 5 O 15 纳米棒，纳米复合材料具有最佳77？wt％gC 3 N 4 的光降解活性是裸gC 3 的6.2倍small> N 4 ，甲醇水溶液中H 2 生产率的提高达到12.1倍在适当地光沉积0.03 wt％Rh助催化剂后。此外，对制备方法的比较研究表明，通过直接生长方法制备的纳米复合材料的光降解速率比仅通过物理混合形成的纳米复合材料高3.4倍。结果证明了在纳米复合物中形成适当的纳米界面的重要性。结合能带结构的理论预测，提出了一种可能的机制，包括在gC 3 N 4 之间形成适当的界面和Sr 2 KNb 5 O 15 <通过直接生长方法促进光致电子-空穴对的空间分离。

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