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分别通过光还原和电还原在以氧化铟锡玻璃为基体的ZnO上沉积Cu和Cu2O,后经400℃空气中热处理,制备了两种CuO/ZnO叠层复合薄膜。用X射线衍射、扫描电子显微镜和X射线能量散射谱分别对复合薄膜的晶相、形貌和化学组成进行表征。以橙黄II在模拟自然光照射下的光催化降解作为探针反应评价其光催化活性。结果表明:由Cu/ZnO经400℃下焙烧1 h转化的CuO/ZnO叠层复合薄膜具有更高的光催化活性,反应1 h后,橙黄II的降解率比由Cu2O/ZnO经400℃下焙烧1 h转化的CuO/ZnO提高了14%。对CuO/ZnO叠层复合薄膜光催化活性提高的原因也进行了讨论。
Cu and Cu2O were deposited on ZnO with indium tin oxide glass substrate by photoreduction and electroreduction, respectively. Then, two kinds of CuO / ZnO laminated composite films were prepared by heat treatment in air at 400 ℃. The crystal phase, morphology and chemical composition of the composite films were characterized by X-ray diffraction, scanning electron microscopy and X-ray energy dispersive spectroscopy. The photocatalytic activity of orange II as a probe reaction was evaluated by photocatalytic degradation under simulated natural light irradiation. The results showed that CuO / ZnO laminated composite films transformed by Cu / ZnO calcined at 400 ℃ for 1 h had higher photocatalytic activity than that of Cu2O / ZnO calcined at 400 ℃ for 1 h The conversion of CuO / ZnO by 1 h increased by 14%. The reasons for the increase of photocatalytic activity of CuO / ZnO laminated composite films are also discussed.