Visible-Light-Driven (VLD) photocatalysis for the dye waste water treatment is impeded by the immediate recombination effect and weak redox potential of the charge carriers. Here, we report the synthesis of silver and antimony tungstate-based novel hybrid composite (Ag₂WO₄/Sb₂WO₆) with significant charge carrier partition and strong redox potential for superior photocatalysis in an aqueous medium. The synthesized composite has a matching electronic band structure and synergistic effect—wherein, Ag₂WO₄ operates as an electron acceptor for Sb₂WO₆ which in return promotes photoelectron transfer; consequently, leading to charge partition and mitigation of electron-hole recombination. Relying upon the solvothermal approach, a fresh hertojunction was obtained via in-situ development of Sb₂WO₆ hierarchical structures on Ag₂WO₄ rods. Samples prepared were tested for their photocatalytic evaluation by degradation of non-azo dye rhodamine B (RhB) under visible-light subjection. The Ag₂WO₄/Sb₂WO₄ composite materials (comprising type 2 hetero-junction), displayed enhanced photocatalytic performance in comparison to the pristine Sb₂WO₆. In addition, the effect of the Ag₂WO₄ amount on photocatalytic activity was investigated. Among the four different compositions—9 wt%, 12 wt%, 15 wt%, and 18 wt% of Ag₂WO₄ in the composite (i.e., Ag₂WO₄/Sb₂WO₆), the composite with a 15 wt% composition of Ag₂WO₄ illustrated superior performance. In the case of the composite with 15-wt% of Ag₂WO₄, the photocatalytic degradation of RhB exhibits k_app value of 3.3x10^-2 min^-1 which is 5.4 times greater than k_app values of pristine Sb₂WO₆ (6.1x10^-3 min^-1). In the radical scavenger tests, ·OH and h⁺ were identified as the main reactive species—for which a possible photocatalytic mechanism is sketched to display the charge transfer and partition in Ag₂WO₄/Sb₂WO₆. Lastly, the composite catalyst revealed an excellent photostability with 86 % retention of photocatalytic efficiency after four catalytic cycles.

可见光驱动（VLD）光催化处理染料废水受到电荷载体的立即复合效应和弱氧化还原电势的阻碍。在这里，我们报告银和钨酸钨基新型杂化复合材料（Ag ₂ WO ₄ / Sb ₂ WO ₆）的合成，该复合材料具有明显的电荷载流子分配和强大的氧化还原电势，可在水性介质中实现优异的光催化作用。合成的复合材料具有匹配的电子带结构和协同效应，其中，Ag ₂ WO ₄作为Sb ₂ WO ₆的电子受体反过来促进光电子转移；因此，导致电荷分配和电子-空穴复合的减轻。依靠溶剂热方法，通过在Ag ₂ WO ₄棒上原位形成Sb ₂ WO ₆分层结构获得了新鲜的异质结。通过在可见光照射下降解非偶氮染料若丹明B（RhB）来测试制备的样品的光催化性能。与原始Sb ₂ WO ₆相比，Ag ₂ WO ₄ / Sb ₂ WO ₄复合材料（包含2型异质结）显示出增强的光催化性能。。另外，研究了Ag ₂ WO ₄量对光催化活性的影响。在四种不同的成分中，复合材料（即Ag ₂ WO ₄ / Sb ₂ WO ₆）中的Ag ₂ WO _4的含量为9 wt％，12 wt％，15 wt％和18 wt％，复合材料的含量为15 wt％ Ag ₂ WO _4的％组成说明了优异的性能。在具有15 wt％的Ag ₂ WO ₄的复合材料的情况下，RhB的光催化降解表现出k _app值为3.3x10 ^-2 min ^-1这是原始Sb ₂ WO _6的k _app值（6.1x10 ^-3 min ^-1）的5.4倍。在自由基清除剂测试中，·OH和h ⁺被确定为主要的反应物种-对其勾勒出一种可能的光催化机理，以显示Ag ₂ WO ₄ / Sb ₂ WO _6中的电荷转移和分配。最后，复合催化剂显示出优异的光稳定性，在四个催化循环后保留了86％的光催化效率。