A method for manufacturing molybdenum disulfide powder includes conducting a precursor solution preparation step and a hydrothermal synthesis step. The precursor solution preparation step includes providing sodium molybdenum oxide dehydrate and thiourea and conducting a mixing step. In the mixing step, an acid solution is mixed with the sodium molybdenum oxide dehydrate and the thiourea by titrating so as to form a precursor solution. The hydrothermal synthesis step is conducted by putting the precursor solution into a hydrothermal container for reacting at a temperature ranging from 100 ℃ to 350 ℃ for 8 hours to 40 hours, so that a molybdenum disulfide powder is formed. The catalytic activity of the molybdenum disulfide powder can be induced by an external force under dark environment, which is favorable for reducing energy consumption.一種二硫化鉬粉末的製備方法,包含進行一前驅物溶液配製步驟以及進行一水熱合成步驟。前驅物溶液配製步驟包含提供二水鉬酸鈉與硫脲及進行一混合步驟。進行混合步驟是將酸性溶液以滴定方式與二水鉬酸鈉與硫脲混合,以形成前驅物溶液。進行水熱合成步驟是將前驅物溶液裝入水熱罐中以100℃至350℃的溫度反應8小時至40小時,以獲得二硫化鉬粉末。藉此所形成的二硫化鉬粉末,可在不照光的情況下藉由外力誘發催化活性,有利於降低能源損耗。100‧‧‧二硫化鉬粉末的製備方法110‧‧‧步驟120‧‧‧步驟