Wang Long, Wu Haihua, Lin Yifan, Wang Mingyue, Wang Zilong, Xing Wandong, Wang Sibo, Fang Yuanxing
State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou, 350116, P. R. China.
Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials, Department of Physics, Jinan University, Guangzhou, Guangdong, 510632, P. R. China.
ChemSusChem. 2025 Jul 1;18(13):e202500338. doi: 10.1002/cssc.202500338. Epub 2025 Apr 21.
Achieving intimate interfacial contact between a hydrogen evolution photocatalyst (HEP) and an oxygen evolution photocatalyst (OEP) is crucial for efficient charge carrier transfer, which in turn enhances overall water splitting (OWS) performance. However, traditional metal oxide-based photocatalysts often possess intrinsic limitations. In this study, carbon nitride (CN) with tunable electrostatic properties is employed to form a heterostructure with metal oxides through self-assembly. As such, protonated polymeric CN nanosheets functioned as the HEP, while NiTiO nanoparticles served as the OEP, resulting in a photocatalytic system for OWS, exhibiting H and O evolution rates of 35.6 and 17.7 μmol h , respectively. The corresponding apparent quantum yield is 2.7% at an incident wavelength of 365 nm. These results outperform those of individual photocatalysts. This study introduces a universally applicable electrostatic self-assembly strategy for using CN to construct redox-mediator-free heterojunctions, thereby advancing applications in various fields, particularly the hydrogen evolution reaction via photocatalytic OWS.
实现析氢光催化剂（HEP）与析氧光催化剂（OEP）之间的紧密界面接触对于高效电荷载流子转移至关重要，这反过来又能提高整体水分解（OWS）性能。然而，传统的基于金属氧化物的光催化剂往往存在固有局限性。在本研究中，具有可调静电性质的氮化碳（CN）通过自组装与金属氧化物形成异质结构。因此，质子化的聚合CN纳米片用作HEP，而NiTiO纳米颗粒用作OEP，从而形成用于OWS的光催化系统，其析氢和析氧速率分别为35.6和17.7 μmol h 。在365 nm的入射波长下，相应的表观量子产率为2.7%。这些结果优于单个光催化剂。本研究引入了一种普遍适用的静电自组装策略，用于利用CN构建无氧化还原介质的异质结，从而推动其在各个领域的应用，特别是通过光催化OWS进行析氢反应。
