【摘要】 目的 通过水热法制备形貌规整、粒径均一、且具有光催化活性的MoO₂纳米粒子。方法 通过水热处理（NH₄）₂Mo₄O₁₃悬浊液制备单斜相MoO₂纳米粒子，用XRD,FE-SEM,Raman, EDX, XPS及UV-vis DRS等分析手段对样品的物相、形貌和化学组成进行表征测试，探究反应温度、反应时间对制备MoO₂纳米粒子晶相和形貌的影响。结果 在190℃下水热处理（NH₄）₂Mo₄O₁₃悬浊液20 h,可制得分散性较好、平均粒径约50 nm的MoO₂纳米粒子。通过模拟阳光下分解水评估了制备的MoO₂纳米粒子作为光催化剂的光电化学性能，结果显示其产生的光电流密度及产氢量分别为21.7μA/cm²和161.9μmol/（h·g）。结论 制备的MoO₂纳米粒子具有优异的可视光催化性能。更多还原

【Abstract】 Purposes—To prepare MoO₂ nanoparticles with regular morphology, uniform particle size and photocatalytic activity by hydrothermal method. Methods—The monoclinic MoO₂ nanoparticles were prepared by hydrothermally treating a（NH₄）₂Mo₄O₁₃ suspension. The phase, morphology and chemical composition of the samples were characterized by XRD, FE-SEM, Raman, EDX, XPS and UV-vis DRS. The effects of reaction temperature and reaction time on the crystal phase and morphology of MoO₂ nanoparticles were investigated. Result—The MoO₂ nanoparticles with good dispersibility and average particle size of about 50 nm were prepared by hydrothermally treating a（NH₄）₂Mo₄O₁₃ suspension for 20 h at 190 ℃. The photoelectrochemical properties of the MoO₂ nanoparticles as photocatalysts were evaluated by splitting water under simulating sunlight. The photocurrent density and amounts of H₂ evolved by the MoO₂ nanoparticles were 21.7 μA/cm² and 161.9 μmol/（h·g）, respectively. Conclusion—The prepared MoO₂ nanoparticles have excellent visible photocatalytic properties.更多还原