我院王万军教授第一作者论文《Earth-abundant Ni2P/g-C3N4 lamellar nanohydrids for enhanced photocatalytic hydrogen evolution and bacterial inactivation under visible light irradiation》（收录期刊APPLIED CATALYSIS B-ENVIRONMENTAL，IF2017=11.698）入选ESI高被引论文（Highly cited papers）和热点论文（Hot papers）。论文通讯作者是我院安太成教授和香港中文大学王保强教授。
论文主要验证了一种制备不含任何贵金属元素又含有地球上丰富元素的光催化剂的方法，可用于能源生产和环境应用。研究以磷化镍(Ni2P)作为非贵金属辅助催化剂，基于Z-scheme类型的电子传输模型，将其与非金属g-C3N4偶联。在不添加任何表面活性剂或载体的条件下，采用水热法一步制备了g-C3N4纳米片，实现了大块g-C3N4纳米片的剥落和Ni2P纳米粒子的原位合成和固载。优化后的Ni2P/g-C3N4层状纳米氢化物在没有贵金属负载的情况下，对制备H2和灭活细菌均表现出明显的可见光驱动光催化活性，得到的活性分别是纯g-C3N4的22倍和10倍左右。Ni2P通过Z-scheme类型途径有效地捕获光生e-，从而显著促进了e--h+的分离以及随后质子的还原生成H2。细菌失活是h+的直接氧化过程，因此Ni2P对e-的捕获也促进了h+的积累，从而提高了细菌的失活效率。
ABSTRACT
Photocatalysts made of earth-abundant elements are highly desired for photocatalytic H2 evolution as well as bacterial inactivation without requirement of noble metal (i.e. Pt, Ag). In this study, nickel phos-phide (Ni2P) was used as a nonprecious co-catalyst to couple with metal-free g-C3N4 based on Z-scheme type of electron transportation model. The exfoliation of bulk g-C3N4, the in-situ synthesis and anchoring of Ni2P nanoparticles onto the g-C3N4 nanosheets were achieved in one-step by a hydrothermal method without adding any surfactants or templates. The optimized Ni2P/g-C3N4 lamellar nanohydrids exhibited remarkably enhanced visible-light-driven photocatalytic activity for H2evolution and bacterial inacti-vation without noble metal loading, and the obtained activity is approximately 22 and 10 times higher than that of pure g-C3N4, respectively. The Ni2P was proposed to effectively trap the photo-generated e− via a Z-scheme type of route, thus significantly promoting the e−-h+ separation and subsequent reduction of protons to generate H2. The bacterial inactivation was found to undergo a direct h+ oxi-dation process, and therefore the trapping of e− by Ni2P also facilitated h+ accumulation, leading to enhanced bacterial inactivation efficiency. This study demonstrates a proof-of-concept for constructing all-earth-abundant photocatalysts without any noble metal elements for both energy production and environmental application.
