Rational synthesis of poly(heptazine imides) nanorod in ternary LiCl/NaCl/KCl for visible light hydrogen production

IF 8.9 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2025-07-23 DOI:10.1016/j.cclet.2025.111621

Xiao Liu , Hangqi Liu , Qian Wang , Dandan Zheng , Sibo Wang , Masakazu Anpo , Guigang Zhang

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Abstract

Poly(heptazine imide) (PHI), a new allotrope of heptazine-based carbon nitride, is usually synthesized in the presence of binary molten salts (e.g., LiCl/NaCl, LiCl/KCl, NaCl/KCl) with diverse melting points and solvation abilities. However, the quantum efficiency of PHI for photocatalytic hydrogen production is still extremely restrained. Herein, a series of ternary molten salt mixtures (LiCl/NaCl/KCl) with varying compositions and properties, were employed for the rational control of the polymerization process of PHI and thus optimization in the optical properties, charge separation behaviors, and also photocatalytic performance. The results indicate that the ternary molten salts provide suitable environment for the development of a nanorod morphology, which significantly improves separation of photo-induced charge carriers. Hence, the optimized PHI presents a high apparent quantum yield (AQY = 52.9 %) for visible-light driven hydrogen production.

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在LiCl/NaCl/KCl三元体系中合理合成聚七嗪亚胺纳米棒用于可见光制氢

聚庚烷酰亚胺（PHI）是一种新型的庚烷基氮化碳同素异形体，通常是在具有不同熔点和溶剂化能力的二元熔盐（如LiCl/NaCl、LiCl/KCl、NaCl/KCl）存在下合成的。然而，PHI光催化制氢的量子效率仍然受到极大的限制。本文采用一系列不同组成和性质的三元熔盐混合物（LiCl/NaCl/KCl），对PHI的聚合过程进行合理控制，从而优化其光学性质、电荷分离行为和光催化性能。结果表明，三元熔盐为纳米棒形态的形成提供了适宜的环境，显著提高了光诱导载流子的分离效果。因此，优化后的PHI在可见光驱动制氢方面具有较高的表观量子产率（AQY = 52.9 %）。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.