Guo Yantong, Hu Xunliang, Sun Ruixue, Wang Xiaoyan, Tan Bien
Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Luoyu Road No. 1037, 430074, Wuhan, P. R. China.
ChemSusChem. 2023 Oct 20;16(20):e202300759. doi: 10.1002/cssc.202300759. Epub 2023 Aug 8.
Photocatalytic hydrogen evolution through water splitting offers a promising way to convert solar energy into chemical energy. Covalent triazine frameworks (CTFs) are ideal photocatalysts owing to its exceptional in-plane π-conjugation, high chemical stability, and sturdy framework structure. However, CTF-based photocatalysts are typically in powder form, which presents challenges in catalyst recycling and scale-up applications. To overcome this limitation, we present a strategy for producing CTF films with excellent hydrogen evolution rate that are more suitable for large-scale water splitting due to their ease of separation and recyclability. We developed a simple and robust technique for producing CTF films on glass substrates via in-situ growth polycondensation, with thicknesses adjustable from 800 nm to 27 μm. These CTF films exhibit exceptional photocatalytic activity, with the hydrogen evolution reaction (HER) performance reaching as high as 77.8 mmol h g and 213.3 mmol m h with co-catalyst Pt under visible light (≥420 nm). Additionally, they demonstrate good stability and recyclability, further highlighting their potential in green energy conversion and photocatalytic devices. Overall, our work presents a promising approach for producing CTF films suitable for a range of applications and paves the way for further developments in this field.
通过水分解进行光催化析氢为将太阳能转化为化学能提供了一条很有前景的途径。共价三嗪框架（CTF）由于其出色的面内π共轭、高化学稳定性和坚固的框架结构，是理想的光催化剂。然而，基于CTF的光催化剂通常为粉末形式，这在催化剂回收和放大应用方面带来了挑战。为了克服这一限制，我们提出了一种制备CTF薄膜的策略，该薄膜具有优异的析氢速率，由于其易于分离和可回收性，更适合大规模水分解。我们开发了一种简单而稳健的技术，通过原位生长缩聚在玻璃基板上制备CTF薄膜，其厚度可在800 nm至27μm之间调节。这些CTF薄膜表现出优异的光催化活性，在可见光（≥420 nm）下与助催化剂Pt共同作用时，析氢反应（HER）性能高达77.8 mmol h g和213.3 mmol m h。此外，它们还表现出良好的稳定性和可回收性，进一步突出了其在绿色能源转换和光催化器件中的潜力。总体而言，我们的工作为制备适用于一系列应用的CTF薄膜提供了一种很有前景的方法，并为该领域的进一步发展铺平了道路。
