State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350007, Fuzhou, P.R. China.
Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, Fujian, 361021, P.R. China.
ChemSusChem. 2019 Oct 8;12(19):4493-4499. doi: 10.1002/cssc.201901997. Epub 2019 Sep 3.
Photocatalytic conversion of CO into value-added chemical fuels is a promising approach to address the depletion of fossil energy and environment-related concerns. Tailor-making the electronic properties and band structures of photocatalysts is pivotal to improve their efficiency and selectivity in photocatalytic CO reduction. Herein, a covalent triazine-based framework was developed containing electron-donor triphenylamine and electron-acceptor triazine components (DA-CTF). The engineered π-conjugated electron donor-acceptor dyads in DA-CTF not only optimized the optical bandgap but also contributed to visible-light harvesting and migration of photoexcited charge carriers. The activity of photocatalytic CO reduction under visible light was significantly improved compared with that of traditional g-C N and reported covalent triazine-based frameworks. This study provides molecular-level insights into the mechanism of photocatalytic CO reduction.
光催化将 CO 转化为高附加值的化学燃料是解决化石能源枯竭和环境问题的一种很有前途的方法。调整光催化剂的电子特性和能带结构对于提高其在光催化 CO 还原反应中的效率和选择性至关重要。在此，我们开发了一种含有电子给体三苯胺和电子受体三聚氰胺单元的共价三嗪骨架（DA-CTF）。DA-CTF 中的受主-供体 π 共轭电子给体-受体二聚体不仅优化了光学带隙，而且有助于可见光的捕获和光激发载流子的迁移。与传统的 g-C3N4和报道的共价三嗪基框架相比，可见光下光催化 CO 还原的活性显著提高。本研究为光催化 CO 还原的机理提供了分子水平的见解。
