In this study, a novel molybdenum disulfide modified nickel titanate composite photocatalyst MoS₂/NiTiO₃ was designed and synthesized by a simple hydrothermal method. The petal-like MoS₂ is highly dispersive, which provides many active sites. The photocatalytic activity of MoS₂/NiTiO₃ for hydrogen evolution is better than that of pure MoS₂ and NiTiO₃ nanosheets. The hydrogen evolution amount of MoS₂/NiTiO₃ is 300.43 μmol, which is 5.3 and 1.9 times higher than of pure NiTiO₃ and MoS₂, respectively. In addition, the catalyst 7% MoS₂/NiTiO₃ has good stability through cyclic experiments. The results of photoluminescence spectroscopy and photoelectrochemical measurements show that the introduction of MoS₂ accelerates the separation and transfer efficiency of photogenerated electrons. We have also proposed new discoveries for charge transfer mechanism of MoS₂/NiTiO₃ composite catalyst, which will provide a novel way to develop simple and inexpensive photocatalysts.

本研究通过简单的水热法设计合成了一种新型的二硫化钼修饰的钛酸镍复合光催化剂MoS ₂ / NiTiO ₃。花瓣状的MoS ₂具有高度分散性，可提供许多活性部位。MoS ₂ / NiTiO ₃对氢析出的光催化活性要好于纯MoS ₂和NiTiO ₃纳米片。MoS ₂ / NiTiO ₃的析氢量为300.43μmol，分别比纯NiTiO ₃和MoS ₂高5.3和1.9倍。另外，催化剂7％MoS ₂通过循环实验，/ NiTiO ₃具有良好的稳定性。光致发光光谱和光电化学测量的结果表明，MoS ₂的引入加速了光生电子的分离和转移效率。我们还提出了MoS ₂ / NiTiO ₃复合催化剂的电荷转移机理的新发现，这将为开发简单而廉价的光催化剂提供一种新颖的方法。