NiSe₂ and Ni_1-xSe (x = 0–0.15) were successfully synthesized by a simple way, including composite-salt-mediated method (CSM), composite-salt-hydroxide-mediated method (CHSM) and solvothermal method, etc. It was found that the phase structure and morphology of the products were mainly influenced by the reaction mediate, reaction time, temperature, addition of H₂O and so on. At 210 ℃, when the reaction time is prolonged, the products can transform from NiSe₂ micro-octahedrons to Ni_1-xSe microspheres, microellipsoids, or cracked micro-octahedrons in different mediate. The chemical reaction in different mediate is studied and accordingly, the mechanism of the formation of nickel selenides is discussed in detail.

通过简单的方法成功地合成了NiSe ₂和Ni _1-x Se（x = 0-0.15），包括复合盐介导法（CSM），复合盐氢氧化物介导法（CHSM）和溶剂热法等。结果发现，产物的相结构和形貌主要受反应介质，反应时间，温度，H ₂ O添加量等的影响。在210℃下，当反应时间延长时，产物可以不同的方式从NiSe ₂微八面体转变为Ni _1-x Se微球，微椭圆体或破裂的微八面体。研究了不同介质中的化学反应，并据此研究了镍的形成机理。对硒化物进行了详细讨论。