Shi Chunjing, Ye Sheng, Wang Xuewen, Meng Fanning, Liu Junxue, Yang Ting, Zhang Wei, Wei Jiatong, Ta Na, Lu Gao Qing Max, Hu Ming, Liu Jian
State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences, and Dalian National Laboratory for Clean Energy 457 Zhongshan Road Dalian 116023 P. R. China.
School of Physics and Materials Science East China Normal University 500 Dongchuan Road Shanghai 200241 P. R. China.
Adv Sci (Weinh). 2021 Feb 16;8(7):2001987. doi: 10.1002/advs.202001987. eCollection 2021 Apr.
Janus structures that include different functional compartments have attracted significant attention due to their specific properties in a diverse range of applications. However, it remains challenge to develop an effective strategy for achieving strong interfacial interaction. Herein, a Janus nanoreactor consisting of TiO 2D nanocrystals integrated with Prussian blue analog (PBA) single crystals is proposed and synthesized by mimicking the planting process. In situ etching of PBA particles induces nucleation and growth of TiO nanoflakes onto the concave surface of PBA particles, and thus enhances the interlayer interaction. The anisotropic PBA-TiO Janus nanoreactor demonstrates enhanced photocatalytic activities for both water reduction and oxidation reactions compared with TiO and PBA alone. As far as it is known, this is the first PBA-based composite that serves as a bifunctional photocatalyst for solar water splitting. The interfacial structure between two materials is vital for charge separation and transfer based on the spectroscopic studies. These results shed light on the elaborate construction of Janus nanoreactor, highlighting the important role of interfacial design at the microscale level.
包含不同功能区室的Janus结构因其在多种应用中的特殊性质而备受关注。然而，开发一种实现强界面相互作用的有效策略仍然具有挑战性。在此，通过模拟种植过程，提出并合成了一种由TiO₂D纳米晶体与普鲁士蓝类似物（PBA）单晶集成的Janus纳米反应器。PBA颗粒的原位蚀刻诱导TiO纳米片在PBA颗粒的凹面上成核和生长，从而增强层间相互作用。与单独的TiO和PBA相比，各向异性的PBA-TiO Janus纳米反应器对水还原和氧化反应均表现出增强的光催化活性。据所知，这是第一种用作太阳能水分解双功能光催化剂的基于PBA的复合材料。基于光谱研究，两种材料之间的界面结构对于电荷分离和转移至关重要。这些结果为Janus纳米反应器的精细构建提供了启示，突出了微观尺度界面设计的重要作用。
