Phase engineering of covalent triazine frameworks to enhance photocatalytic hydrogen evolution performance
Peng Wu, Jijun Lu, Fengshuo Xi, Xiufeng Li, Wenhui Ma, Fangyuan Kang, Shaoyuan Li, Zhongqiu Tong, Qichun Zhang
Abstract
). Clearly, the stacking modes significantly influence the cycling stability of CTFs. After eight cycles (over 32 h), CTF-AA maintains its photocatalytic activity and initial performance with a slight decline, while CTF-AB only retains 56.8% of its initial hydrogen evolution rate. Theoretical calculations and physical characterization confirm that the transition of the stacking mode from AB to AA enhances interlayer overlapping, increases the energy level of the lowest unoccupied molecular orbital, and improves the separation and mobility of carriers. These combined factors significantly enhance the photocatalytic performance of CTF-AA. This work offers new insights into the relationship between the photocatalytic performance of CTFs and their stacking patterns, providing new guidelines for designing CTF catalysts with improved activity.