【摘要】 以一种简单的方法制备CuWO₄,并研究了CuWO₄促进Ti O₂光催化降解水中阿特拉津的效能及可能机理。结果表明,反应体系加入少量（50 mg/L）CuWO₄显著加快Ti O₂光催化降解水中阿特拉津,反应270 min降解率达92.1%,较单一Ti O₂催化效率提高1.94倍;CuWO₄在降解过程中显示出较强的稳定性,溶液中微量溶解的Cu²⁺接收电子形成Cu（II）/Cu（I）的价态变化;随CuWO₄煅烧温度（100～800℃）的升高降解率先增大后下降,500℃达到最大,而Cu²⁺溶出率则显著降低,CuWO₄-Ti O₂催化体系的正效应归功于固态CuWO₄;光生电子及HO^·自由基及光生电子在反应体系中起主要作用。实验结果有助于其他Cu基半导体提升Ti O₂催化活性的研究。更多还原

【Abstract】 CuWO₄was prepared by a simple method,and Cu WO₄improving photocatalytic degradation for atrazine by Ti O₂as well as the possible mechanism was studied.Results showed that,an addition of a small amount of CuWO₄（50 mg/L）into the reaction system could significantly enhance the efficiency of atrazine degradation,resulting in an increased degradation efficiency of 92.1%after 270 min,which was 1.94 times higher than that of the single TiO₂.CuWO₄showed robust stability and the slight dissolved Cu²⁺received e-forming behavior of Cu（II）/Cu（I）during the photocatalytic process.As the sintering temperate of Cu WO₄increased（100～800℃）,the degradation efficiency of atrazine increased initially and then deceased,the maximum reached at500℃,but the dissolution rate of Cu²⁺decreased significantly.The origin of high phtotocatalytic effect of TiO₂-CuWO₄was attributed to the introduction of solid Cu WO₄.The photo-induced electron and HO^·radical played an important role in this reaction system.The experimental results were conductive to the research of improving photocatalytic activity of TiO₂with Cu-bearing semiconductors.更多还原