Titanium nitride (TiN) decorated N-doped titania (N-TiO₂) composite (TiN/N-TiO₂) is fabricated via an in situ nitridation using a hydrothermally synthesized TiO₂ and melamine (MA) as raw materials. After the optimization of the reaction condition, the resultant TiN/N-TiO₂ composite delivers a hydrogen evolution activity of up to 703 µmol/h under the full spectrum irradiation of Xelamp, which is approximately 2.6 and 32.0 times more than that of TiO₂ and TiN alone, respectively. To explore the underlying photocatalytic mechanism, the crystal phase, morphology, light absorption, energy band structure, element composition, and electrochemical behavior of the composite material are characterized and analyzed. The results indicate that the superior activity is mainly caused by the in situ formation of plasmonic TiN and N-TiO₂ with intimate interface contact, which not only extends the spectral response range, but also accelerates the transfer and separation of the photoexcited hot charge carrier of TiN. The present study provides a fascinating approach to in situ forming nonmetallic plasmonic material/N-doped TiO₂ composite photocatalysts for high-efficiency water splitting.

氮化钛 (TiN) 装饰的 N 掺杂二氧化钛 (N-TiO ₂ ) 复合材料 (TiN/N-TiO ₂ ) 是使用水热合成的 TiO ₂和三聚氰胺 (MA) 作为原料通过原位氮化制备的。优化反应条件后，得到的TiN/N-TiO ₂复合材料在Xelamp全光谱照射下的析氢活性高达703 μmol/h，约为TiO _{2 的}2.6和32.0倍和单独的 TiN，分别。为了探索潜在的光催化机理，对复合材料的晶相、形貌、光吸收、能带结构、元素组成和电化学行为进行了表征和分析。结果表明，优异的活性主要是由于等离子体 TiN 和 N-TiO _{2 的}原位形成密切界面接触，不仅扩展了光谱响应范围，而且加速了光激发热载流子的转移和分离。氮化钛。本研究为原位形成用于高效分解水的非金属等离子体材料/N 掺杂 TiO ₂复合光催化剂提供了一种引人入胜的方法。