Fabrication of heterostructure composed of one-dimensional (1D) and 2D semiconductors has inspired extensive interest in promoting photogenerated charge separation as well as performances of solar fuel production, but it is still challenging for (oxy)nitride photocatalysts due to their uncontrollable ammonia thermal preparative process. In this work, we report a synthesis on heterostructure of Ta₃N₅ nanorods and CaTaO₂N (CTON) nanosheets (denoted as Ta₃N₅/CTON) by directly nitriding a 2D Dion-Jacobson (DJ) type of perovskite KCa₂Ta₃O₁₀ (KCTO) precursor under the assistance of K₂CO₃ flux. It is demonstrated that the 2D morphology of KCTO can be well inherited to get 2D CTON, and the Ta-rich (non-stoichiometric ratio of Ca:Ta compared to CTON) feature of the KCTO as well as the easy evaporation of K species results in the formation of 1D Ta₃N₅ nanorods. Meanwhile, the formation of intermediate species K₂Ca₂Ta₃O₉N owning similar crystal lattice as Ta₃N₅ was detected and deduced to be responsible for the generation of Ta₃N₅ nanorods and observation of intimate interface between CTON and Ta₃N₅. Benefitting from the formation of special 1D/2D type-II heterostructure, obviously promoted charge separation as well as photocatalytic water splitting performance can be obtained. Extended discussion demonstrates the generality of the hard-template preparative strategy developed here. To our knowledge, this should be the first fabrication of 1D/2D heterostructure for the (oxy)nitride semiconductors, and the developed hard-template strategy may provide an alternative way of fabricating heterostructures of other semiconductors prepared at high temperature.

由一维（1D）和二维半导体组成的异质结构的制造激发了人们对促进光生电荷分离以及太阳能燃料生产性能的广泛兴趣，但由于其不可控的氨热制备，（氧）氮化物光催化剂仍然具有挑战性过程。在这项工作中，我们通过直接氮化二维 Dion-Jacobson (DJ) 型钙钛矿 KCa _{2 来}合成 Ta ₃ N ₅纳米棒和 CaTaO ₂ N (CTON) 纳米片（表示为 Ta ₃ N ₅ /CTON）的异质结构K ₂ CO ₃辅助下的Ta ₃ O ₁₀ (KCTO) 前驱体通量。结果表明，KCTO 的二维形态可以很好地继承以获得二维 CTON，以及 KCTO 的富 Ta（与 CTON 相比，Ca:Ta 的非化学计量比）特征以及 K 物质的易蒸发结果1D Ta ₃ N ₅纳米棒的形成。同时，检测到具有与Ta ₃ N ₅相似晶格的中间体 K ₂ Ca ₂ Ta ₃ O ₉ N的形成，并推断出形成 Ta ₃ N ₅纳米棒和观察 CTON 和 Ta 之间的紧密界面的原因₃ N ₅. 得益于特殊的1D/2D II型异质结构的形成，可以获得明显促进的电荷分离和光催化水分解性能。扩展讨论展示了此处开发的硬模板准备策略的一般性。据我们所知，这应该是第一次制造（氧）氮化物半导体的 1D/2D 异质结构，而开发的硬模板策略可能会提供另一种制造高温下制备的其他半导体异质结构的方法。