Abstract We reported the preparation of new ternary n-BaTiO3/Ag/p-AgBr heterostructured photocatalysts and their promising photocatalytic application for the dye degradation. The ternary n-BaTiO3/Ag/p-AgBr heterostructured photocatalysts are constructed by coupling n-type BaTiO3 and p-type AgBr particles onto Ag nanowires. Various methods including XRD, SEM, TEM, XPS, FTIR, UV–vis diffuse reflectance spectroscopy, PL spectroscopy, photocurrent response and EIS were used to characterize the as-prepared photocatalysts. The photodegradation performances of the photocatalysts were assessed by using RhB as the model pollutant and simulated sunlight as the light source. It is demonstrated that the n-BaTiO3/Ag/p-AgBr ternary composite photocatalysts exhibit excellent photodegradation performances superior to bare BaTiO3 and AgBr particles. Particularly, the 20 %BTO/1.2 %Ag/AgBr composite can photocatalyze 99.3 % removal of RhB after 12 min photoreaction, and has a photodegradation activity which is about 3.1 times larger than that of bare AgBr particles. The underlying photodegradation mechanism of the ternary composite photocatalysts was investigated and discussed.

中文翻译：

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用于染料降解的三元n-BaTiO3/Ag/p-AgBr异质结构光催化剂的制备及光催化应用

摘要 我们报道了新型三元 n-BaTiO3/Ag/p-AgBr 异质结构光催化剂的制备及其在染料降解中的有前景的光催化应用。三元 n-BaTiO3/Ag/p-AgBr 异质结构光催化剂是通过将 n 型 BaTiO3 和 p 型 AgBr 颗粒耦合到 Ag 纳米线上来构建的。使用各种方法，包括 XRD、SEM、TEM、XPS、FTIR、UV-vis 漫反射光谱、PL 光谱、光电流响应和 EIS 来表征所制备的光催化剂。以RhB为模型污染物，模拟太阳光为光源，对光催化剂的光降解性能进行了评估。结果表明，n-BaTiO3/Ag/p-AgBr 三元复合光催化剂表现出优于裸 BaTiO3 和 AgBr 颗粒的优异光降解性能。特别，20%BTO/1.2%Ag/AgBr复合物在光反应12分钟后可光催化99.3%去除RhB，光降解活性是AgBr裸颗粒的3.1倍左右。研究和讨论了三元复合光催化剂的潜在光降解机制。