Photocatalysis is one of the versatile processes widely applied for the treatment of environmental water pollutant. In this work, NiS/Ag₂MoO₄ heterostructured nanocomposite (NCs) was synthesized via ultra-sonication assisted and chemical co-precipitation methods. The prepared particle was characterized using HR-TEM, SAED, EDAX, UV–vis DRS, XRD, nitrogen adsorption and desorption, PL, and XPS. The band gap of NCs was found to be 2.77 eV which facilitates the enhanced activity in visible region. The heterostructure formation between NiS and Ag₂MoO₄ have induced the separation of charges efficiently which caused the increase in photocatalytic performanc. The photocatalytic study reveals that NiS/Ag₂MoO₄ enhanced the degradation of MB (90.8%) relative to individual NiS and Ag₂MoO₄. The MB degradation followed pseudo first order reaction (R² < 0.955). The radical trapping experiment confirmed that the major species involved in photodegradation process were superoxide and hydroxyl radicals. The prepared photocatalyst was structurally stable and highly reusable as confirmed by cycles test. Also, the NCs showed excellent anti-bacterial property. The results confirmed the good potentiality of NCs to degrade the organic dye compounds and as a good anti-bacterial agent.

光催化是广泛用于处理环境水污染物的通用方法之一。在这项工作中，通过超声辅助和化学共沉淀法合成了NiS / Ag ₂ MoO ₄异质结构纳米复合材料（NCs）。使用HR-TEM，SAED，EDAX，UV-vis DRS，XRD，氮吸附和解吸，PL和XPS对制备的颗粒进行了表征。发现NC的带隙为2.77eV，其促进了可见区域中增强的活性。NiS和Ag ₂ MoO ₄之间的异质结构有效诱导了电荷的分离，从而引起了光催化性能的提高。光催化研究表明，NiS / Ag ₂ MoO₄增强相对于个体的NiS和Ag MB（90.8％）的降解₂的MoO ₄。MB降解遵循拟一级反应（R ²  <0.955）。自由基捕获实验证实，参与光降解过程的主要物质是超氧自由基和羟基自由基。如循环试验所证实，所制备的光催化剂在结构上是稳定的并且可高度重复使用。另外，NC显示出优异的抗菌性能。结果证实了NCs具有降解有机染料化合物和作为良好抗菌剂的良好潜力。