通过 n → π* 电子跃迁优化聚（庚嗪酰亚胺）的光吸收以改善光催 …
Poly (heptazine imide)（简称 PHI）是一种基于庚嗪的结晶氮化碳光催化剂，由于其高结晶度，在光催化析氢过程中引起了广泛关注。 然而，直接合成的PHI的光吸收范围普遍较窄，严重阻碍了可见光的利用。 许多研究旨在扩展 PHI 的光学吸收范围；但要么优化程度不够，要么合成过程繁琐。 在此，红色 PHI (RPHI) 用于改进光催化 H 2进化过程很容易通过一步法合成。
Structural Insights into Poly (Heptazine Imides): A Light-Storing ...
2019年8月12日 · Herein, we report on two-dimensional layered potassium poly(heptazine imide) (K-PHI) and its proton-exchanged counterpart (H-PHI), obtained by ionothermal synthesis using a molecular precursor route. We present a comprehensive analysis of the in-plane and three-dimensional structure of PHI.
Poly(heptazine imide) ligand exchange enables remarkable low …
2023年3月17日 · Potassium poly(heptazine imide) (K-PHI) exhibits a well-defined and highly ordered structure of negative PHI-layers with K + cations as charge compensation 57,58,59,60, offering the possibility...
Advances in poly(heptazine imide)/poly(triazine imide) …
2024年10月1日 · In efforts to enhance its photocatalytic performance, researchers have examined various PCN materials, including poly (heptazine imide) (PHI) and poly (triazine imide) (PTI), two isomers within the PCN family that exhibit distinct and …
Angewandte Chemie International Edition - Wiley Online Library
2024年8月27日 · As organic semiconductor materials gain increasing prominence in the realm of photocatalysis, two carbon-nitrogen materials, poly (heptazine imide) (PHI) and poly (triazine imide) (PTI), have garnered extensive attention and …
Integral morphology and structure design of poly (heptazine imide…
Carbon nitride obtained from ammonium persulfate-assisted salt synthesis has highly crystalline poly (heptazine imide) structure with in-situ oxygen doping and porous structure. The smooth charge tra...
Metal Poly(heptazine imides) as Multifunctional Photocatalysts …
2024年4月30日 · Metal poly (heptazine imide) (M PHI), a novel 2D ionic carbon nitride, has been recognized as an emerging photocatalyst with distinctive properties. This minireview summarizes the recent advancements on the synthetic strategies, state-of-the-art characterizations and the application of M PHI toward photocatalytic solar fuel production.
Calcium Poly(Heptazine Imide): A Covalent Heptazine …
2022年3月31日 · Potassium poly(heptazine imide) (KPHI) has recently garnered attention as a crystalline carbon nitride framework with considerable photoelectrochemical activity. Here, we report a Ca 2+-complexed analogue of PHI: calcium poly(heptazine imide) (CaPHI). Despite similar polymer backbone, CaPHI and KPHI exhibit markedly different crystal structures.
Melem-derived poly(heptazine imide) for effective charge …
2022年11月5日 · Poly (heptazine imide) (PHI) has emerged as a promising photocatalyst due to its ability to store long-lived photoelectrons. In this study, we report a structure-directed approach to synthesize potassium (K)-PHI from various allotropes of polymeric carbon nitride (PCN) for facilitating photoelectron transfer and improving H 2 production under ...
Modified Poly (Heptazine Imides): Minimizing H
2022年10月31日 · Poly(heptazine imides) (PHIs) are a more powerful subgroup of carbon nitrides whose structure provides high crystallinity and a scaffold to host transition-metal single atoms. Herein, we show that PHIs functionalized with sodium and the recently reported fully protonated PHI exhibit high activity in two-electron ORR under visible light.