Salt-melt synthesis of poly(heptazine imide)in binary alkali metal bromides for enhanced visible-light photocatalytic hydrogen production

作     者：Yaxuan Jin Dandan Zheng Zhongpu Fang Zhiming Pan Sibo Wang Yidong Hou Oleksandr Savateev Yongfan Zhang Guigang Zhang 

作者机构：State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhouChina College of Environment and Safety EngineeringFuzhou UniversityFuzhouChina Department of ChemistryThe Chinese University of Hong KongShatinNew TerritoriesHong KongChina 

出 版 物：《Interdisciplinary Materials》 (交叉学科材料（英文）)

年 卷 期：2024年第3卷第3期

页      面：389-399页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：National Key R&D Program of China,Grant/Award Number:2021YFA1502100 National Natural Science Foundation of China,Grant/Award Number:22172029 Science Foundation of the Fujian Province,Grant/Award Number:2022L3084 

主　　题：crystallinity hydrogen evolution photocatalysis poly(heptazine imide) salt-melt synthesis 

摘      要：Poly(heptazine imide)(PHI),a semicrystalline version of carbon nitride photocatalyst based on heptazine units,has gained significant attention for solar H_(2)production benefiting from its advantages including molecular synthetic versatility,excellent physicochemical stability and suitable energy band structure to capture visible ***,PHI is obtained in saltmelt synthesis in the presence of alkali metal ***,we examined the role of binary alkali metal bromides(LiBr/NaBr)with diverse compositions and melting points to rationally modulate the polymerization process,structure,and properties of *** characterizations revealed that semicrystalline PHI with a condensedπ-conjugated system and rapid charge separation rates were obtained in the presence of LiBr/***,the apparent quantum yield of hydrogen using the optimized PHI reaches up to 62.3%at 420 *** density functional theory calculation shows that the dehydrogenation of the ethylene glycol has a lower energy barrier than the dehydrogenation of the other alcohols from the thermodynamic point of *** study holds great promise for rational modulation of the structure and properties of conjugated polymeric materials.