Abstract A facile and low-cost method to prepare novel Ag2O-Ag/LDO photocatalysts was demonstrated, where the Ag2O/Ag nanoparticles were decorated on the ZnAl oxide (LDO) supports. The LDO supports were obtained by calcining their ZnAl layered double hydroxide precursor (LDH) at different temperatures. The structure, composition, morphology and optical and electrochemical properties of the as-prepared Ag2O-Ag/LDO were characterized using various techniques. Under visible light irradiation, the Ag2O-Ag/LDO showed higher photoactivity and stability of tetracycline (TC) degradation than pure Ag2O-Ag. Especially, the Ag2O-Ag/LDO5 (Ag2O-Ag/LDO calcined at 500 °C) had the most excellent photoactivity with the highest rate constant k (0.0242 min−1), suggesting that the photocatalytic activity depended on the calcination temperature. The enhancement of the photocatalytic performance was attributed to the formation of the heterostructure between Ag2O/Ag and ZnO, the strong visible-light absorption and outstanding separation efficiency of photoinduced electron-hole pairs under visible light irradiation.

中文翻译：

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一种具有增强的可见光光催化降解四环素性能的 Ag2O-Ag/ZnAl 氧化物的简便制备

摘要 展示了一种简便且低成本的制备新型 Ag2O-Ag/LDO 光催化剂的方法，其中 Ag2O/Ag 纳米颗粒装饰在 ZnAl 氧化物 (LDO) 载体上。LDO 载体是通过在不同温度下煅烧其 ZnAl 层状双氢氧化物前体 (LDH) 获得的。使用各种技术表征所制备的 Ag2O-Ag/LDO 的结构、组成、形态以及光学和电化学性质。在可见光照射下，Ag2O-Ag/LDO 表现出比纯 Ag2O-Ag 更高的光活性和四环素 (TC) 降解稳定性。特别是，Ag2O-Ag/LDO5（Ag2O-Ag/LDO 在 500°C 下煅烧）具有最优异的光活性和最高的速率常数 k（0.0242 min-1），表明光催化活性取决于煅烧温度。