In the present work, Ni, Co, Zn and Mn doped Ag₂S nanocrystal catalysts were prepared via the hot-injection technique which is one of the top-down approach. The nanocrystals were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscope (SEM), diffuse reflectance spectroscopy (DRS), UV−vis spectroscopy (UV) and cyclic voltammetry (CV) to illuminate the crystal properties and the photocatalytic mechanism. The presence of doping each of the transition metals on Ag₂S nanocrystals were tested for their performance in the photocatalytic hydrogen evolution from water containing TEOA and EY as a hole scavenger and photoabsorber, respectively. The results demonstrated that Ni, Co, Zn and Mn doped Ag₂S nanocrystals were showed higher photocatalytic activity as compared with the Ag₂S under visible light irradiation source. In addition, transition metal consisting Ag₂S catalysts, which in view of the limited literatures, provides new insights for expanding the application of chalcogenide catalysts.

在目前的工作中，通过自上而下方法之一的热注射技术制备了Ni，Co，Zn和Mn掺杂的Ag ₂ S纳米晶催化剂。通过X射线衍射（XRD），透射电子显微镜（TEM），扫描电子显微镜（SEM），漫反射光谱（DRS），紫外可见光谱（UV）和循环伏安法（CV）对纳米晶体进行表征，以照亮纳米晶。晶体性质和光催化机理。测试了在Ag ₂ S纳米晶体上掺杂每种过渡金属的存在，以测试它们在分别由含TEOA和EY的水作为空穴清除剂和光吸收剂的水中光催化制氢的性能。结果表明，Ni，Co，Zn和Mn掺杂Ag _2。在可见光照射源下，与Ag ₂ S相比，S纳米晶体具有更高的光催化活性。此外，鉴于文献有限，过渡金属组成的Ag ₂ S催化剂为扩大硫族化物催化剂的应用提供了新的见识。