In this work, Ag₂WO₄/BiOCl composite photocatalyst was successfully prepared by a facile coprecipitation. The crystalline structures, morphologies, optical properties and photocatalytic activities of photocatalysts have been investigated via XRD, SEM, EDX spectrum, UV–vis diffuse reflectance spectroscopy, PL spectra and electrochemical measurement. After depositing Ag₂WO₄ onto the surface of BiOCl, its phase transformed from α-Ag₂WO₄ to β-Ag₂WO₄ and its morphology changed from nanorods to nanoparticles. Ag₂WO₄ nanoparticles easily grew and assembled on the surface of flower-like BiOCl nanosheets because of its large surface area, which remarkably promote more light scattering/reflection to broaden light absorption. The Ag₂WO₄/BiOCl Z-scheme heterojunction shows higher photocatalytic activity towards degradation of Rhodamine B (RhB) than that of pure BiOCl, the best photocatalytic efficiency is achieved by the10% Ag₂WO₄/ BiOCl heterojunction (81.3%) far surpasses that of pure BiOCl (52.1%) within 25 min under stimulated solar irradiation, owing to effectively improved charge separation of the photogenerated electron-hole pairs. The possible charge transfer processes and mechanism for photocatalytic degradation were proposed.

在这项工作中，Ag ₂ WO ₄ /BiOCl 复合光催化剂通过简便的共沉淀法成功制备。通过XRD、SEM、EDX光谱、UV-vis漫反射光谱、PL光谱和电化学测量研究了光催化剂的晶体结构、形貌、光学性质和光催化活性。在BiOCl表面沉积Ag ₂ WO ₄后，其相从α-Ag ₂ WO ₄转变为β-Ag ₂ WO ₄，其形态从纳米棒转变为纳米颗粒。银₂ WO ₄由于表面积大，纳米颗粒很容易在花状 BiOCl 纳米片的表面生长和组装，这显着促进了更多的光散射/反射，从而扩大了光吸收。Ag ₂ WO ₄ /BiOCl Z型异质结对罗丹明B（RhB）的降解表现出比纯BiOCl更高的光催化活性，最好的光催化效率是10%的Ag ₂ WO ₄ / BiOCl异质结（81.3%）由于有效改善了光生电子-空穴对的电荷分离，在受激太阳辐射下 25 分钟内超过了纯 BiOCl (52.1%)。提出了光催化降解可能的电荷转移过程和机理。