Utilization of solar energy by photocatalysts is a promising green technology for the degradation of organic pollutants in wastewater. Among the various types of metal molybdate photocatalysts applied for environmental remediation, those with monoclinic structures (NiMoO₄, CoMoO₄, MnMoO₄, ZnMoO₄, Ce₂(MoO₄)₃, Fe₂(MoO₄)₃, and Bi₂MoO₆) constitute the largest group of them. These materials possess many valuable properties such as tunable band structures, environmental friendliness, low cost, large surface areas, and tunable electrical conductivity. These promising materials have evidenced effective removal capability for organic pollutants in wastewater. This review focuses on semiconducting metal molybdates containing a monoclinic structure, with an emphasis on various modification strategies employing morphology control, doping, plasmonic material fabrication, or composite fabrication to enhance the photocatalytic activities for the degradation of organic pollutants. This review also discusses the possible obstacles to environmental applications targeted at the removal of organic pollutants, as well as the key challenges, future directions, and prospects.

光催化剂利用太阳能是一种很有前途的绿色废水降解技术。在用于环境修复的各类金属钼酸盐光催化剂中，具有单斜结构的那些（NiMoO ₄、CoMoO ₄、MnMoO ₄、ZnMoO ₄、Ce ₂ (MoO ₄ ) ₃、Fe ₂ (MoO ₄ ) ₃和Bi ₂ MoO ₆) 构成了他们中最大的一组。这些材料具有许多有价值的特性，例如可调带结构、环境友好、低成本、大表面积和可调电导率。这些有前途的材料证明了对废水中有机污染物的有效去除能力。本综述重点关注含有单斜结构的半导体金属钼酸盐，重点介绍采用形态控制、掺杂、等离子体材料制造或复合材料制造的各种改性策略，以增强光催化降解有机污染物的活性。本综述还讨论了以去除有机污染物为目标的环境应用的可能障碍，以及主要挑战、未来方向和前景。