【摘要】 采用浸渍-煅烧方法将Au引入到g-C₃N₄纳米片（CNs）与Co WO₄复合材料中得到Z型异质结光催化剂Au/Co WO₄/CNs（Au/Co Ns-x,x=5、10、20、50）。Au作为电荷传输通道加快了光生电子从Co WO₄迁移至CNs的速度。与Co WO₄/CNs相比，Au/Co Ns-10展示出优异的光催化降解亚甲基蓝和盐酸四环素活性，其表观速率常数分别从0.289和0.360 h^-1提升至0.499和0.637 h^-1。光电测试与自由基捕获实验表明，Au/Co Ns-10光催化性能的显著提升主要是由于Z型异质结的构建降低了光生电子-空穴的复合速率，同时促使具有高氧化活性的羟基自由基（·OH）和超氧自由基（·O₂^-）的形成。更多还原

【Abstract】 The Z-scheme heterojunction photocatalyst Au/Co WO₄/CNs （Au/Co Ns-x,x=5,10,20,50） was obtained by introducing Au into g-C₃N₄nanosheets （CNs） and Co WO₄composites via impregnation-calcination method.The introduction of Au could be a charge transport channel to accelerate the transfer of photogenerated electrons from Co WO₄to CNs.Compared with Co WO₄/CNs,Au/Co Ns-10 exhibited excellent photocatalytic activity for the degradation of methylene blue and tetracycline hydrochloride,and their apparent rate constants were improved from 0.289and 0.360 h^-1to 0.499 and 0.637 h^-1,respectively.Optical and electrical tests and free radical trapping experiments indicate that the significantly improved photocatalytic performance of Au/Co Ns-10 is mainly due to the construction of Z-scheme heterojunction,which reduces the recombination rate of photogenerated electrons and holes,promotes high oxidation activity and accelerates the formation of hydroxyl radicals （·OH） and superoxide radicals （·O₂^-） with high oxidation ability.更多还原