Toxic wastes and water pollution, including dyes such as Rhodamine B (RhB), Congo Red (CR), and Direct Yellow, present significant environmental hazards. These pollutants are harmful due to their toxic byproducts, which affect both marine and human life. Photocatalysis offers a promising solution for wastewater treatment by transforming hazardous organic contaminants into safer byproducts. Molybdenum diselenide (MoSe2), with its chemical stability, small band gap, and high surface area, emerges as a potent material for applications in high-energy density batteries, lubricants, energy storage, catalysis, and more. This article explores the synthesis methods, potential applications, and improvements in the efficiency of MoSe2 for environmental remediation and clean energy technologies. Water pollution due to toxic wastes and synthetic dyes like Rhodamine B (RhB), Congo Red (CR), and Direct Yellow poses severe environmental threats. These pollutants not only discolor water bodies but also...