Covalent triazine frameworks (CTFs) have emerged as new candidate materials in various research areas such as catalysis, gas separation storage, and energy-related organic devices due to their easy functionalization, high thermal and chemical stability, and permanent porosity. Herein, we report the successful synthesis of a CTF rich in cyano groups (CTF-CN) by the solvothermal condensation of 2,3,6,7-tetrabromonapthalene (TBNDA), Na2(1,1-dicyanoethene-2,2-dithiolate), and 1,3,5-tris-(4-aminophenyl)-triazine (TAPT) at 120°C. XRD, SEM, and TEM characterization studies revealed CTF-CN to be amorphous and composed of ultrathin 2D sheets. CTF-CN possessed strong absorption at visible wavelengths, with UV-vis measurements suggesting a band gap energy in the range 2.7-2.9 eV. A 5 wt.% Pt/CTF-CN was found to be a promising photocatalyst for hydrogen production, affording a rate of 487.6 μmol g-1 h-1 in a H2O/TEOA/CH3OH solution under visible light. The photocatalytic activity of CTF-CN was benchmarked against g-C3N4 for meaningful assessment of performance. Importantly, the 5 wt.% Pt/CTF-CN photocatalyst exhibited excellent thermal and photocatalytic stability. Further, as a nitrogen-rich porous 2D material, CTF-CN represents a potential platform for the development of novel electrode material for fuel cells and metal ion batteries.

中文翻译：

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富氮共价三嗪框架作为产氢的光催化剂

共价三嗪骨架（CTFs）由于其易于功能化、高热和化学稳定性以及永久孔隙率，已成为催化、气体分离存储和能源相关有机设备等各个研究领域的新候选材料。在此，我们报道了通过 2,3,6,7-四溴单萘 (TBNDA)、Na2(1,1-二氰基乙烯-2,2-二硫醇盐) 的溶剂热缩合成功合成了富含氰基的 CTF (CTF-CN) ) 和 1,3,5-三-(4-氨基苯基)-三嗪 (TAPT) 在 120°C。XRD、SEM 和 TEM 表征研究表明 CTF-CN 是无定形的，由超薄 2D 片组成。CTF-CN 在可见光波长处具有很强的吸收性，UV-vis 测量表明带隙能量在 2.7-2.9 eV 范围内。一个 5 重量。% Pt/CTF-CN 被发现是一种很有前途的制氢光催化剂，在可见光下在 H2O/TEOA/CH3OH 溶液中的产氢率为 487.6 μmol g-1 h-1。CTF-CN 的光催化活性以 g-C3N4 为基准，以进行有意义的性能评估。重要的是，5 wt.% Pt/CTF-CN 光催化剂表现出优异的热和光催化稳定性。此外，作为一种富氮多孔二维材料，CTF-CN 代表了开发用于燃料电池和金属离子电池的新型电极材料的潜在平台。% Pt/CTF-CN 光催化剂表现出优异的热和光催化稳定性。此外，作为一种富氮多孔二维材料，CTF-CN 代表了开发用于燃料电池和金属离子电池的新型电极材料的潜在平台。% Pt/CTF-CN 光催化剂表现出优异的热和光催化稳定性。此外，作为一种富氮多孔二维材料，CTF-CN 代表了开发用于燃料电池和金属离子电池的新型电极材料的潜在平台。