Structure-Mediated Charge Separation in Boron Carbon Nitride for Enhanced Photocatalytic Oxidation of Alcohol
Structure-Mediated Charge Separation in Boron Carbon Nitride for Enhanced Photocatalytic Oxidation of Alcohol
复制标题
碳氮化硼中结构介导的电荷分离用于增强醇的光催化氧化
DOI：
10.1002/cssc.201801827
复制
发表时间：
2018
期刊：
影响因子：
8.4
通讯作者：
Xinchen Wang
中科院分区：
文献类型：
--
作者：
Min Zhou;Pengju Yang;Sibo Wang;Zhishan Luo;Caijin Huang;Xinchen Wang
氮化硼(BCN)是一种很有前途的富土太阳能光催化剂。然而，由于快速的电子-空穴复合，BCN材料的光催化活性保持在中等水平。本文采用简单的一步热处理方法制备了有序的BCN结构。粉末X射线衍射仪和高分辨电子显微镜直接证明了BCN的有序结构。重要的是，我们发现长周期有序结构本质上可以加速光生载流子的分离和转移动力学。得益于这些优点，有序的BCN结构与原始的BCN结构相比，对苯甲醇的光诱导选择氧化表现出了显著的性能。这项工作突出了捕光材料的晶体结构在影响电子-空穴分离方面的重要作用，同时也指出了提高光催化性能的巨大潜力。
Boron carbon nitride (BCN) is a promising earth‐abundant photocatalyst for solar energy conversion. However, the photocatalytic activities of BCN materials remain moderate because of the fast electron–hole recombination. Herein, an ordered BCN structure is fabricated by a facile one‐step thermal treatment strategy. The ordered structure of BCN is directly evident from powder X‐ray diffraction and high‐resolution transmission electron microscopy. Importantly, it is found that the long‐period ordered structure can intrinsically accelerate the separation and transfer kinetics of photogenerated charge carriers. Benefiting from these advantages, the ordered BCN structure exhibits remarkable performance for photoinduced selective oxidation of benzyl alcohol compared with the pristine BCN counterpart. This work highlights the important role of the crystal structure of light‐harvesting materials in affecting electron–hole separation and at the same time points to the ample potential for improving the photocatalytic performance.