This review discusses the degradation efficiency of organic dyes using carbon quantum dots (CQDs) as photocatalysts. The increasing concern over water pollution from organic contaminants, including dyes and pharmaceuticals, has led to the need for efficient and environmentally friendly methods for their degradation. CQDs, which are carbon-based nanomaterials with sizes between 2 and 10 nm, have shown promise due to their unique optical and electronic properties, including quantum confinement effects and photoluminescence. These properties make CQDs effective for photocatalytic degradation of dyes in water. The review covers various synthesis methods for CQDs, such as hydrothermal, laser ablation, microwave-assisted, and electrochemical approaches. Each method has its advantages and disadvantages, with the hydrothermal method being the most widely used due to its simplicity and effectiveness. CQDs are also noted for their high water solubility, biocompatibility, and low toxicity, making them suitable for environmental applications. The review explores the use of CQDs in the degradation of various dyes, including methylene blue, naphthol blue black, Congo red, indigo carmine, and rhodamine B. The mechanisms of degradation involve the generation of reactive species such as hydroxyl radicals and superoxide anions, which break down the dye molecules. CQDs, when combined with other materials like TiO₂ or ZnO, enhance the photocatalytic efficiency through synergistic effects. The review also highlights the potential of CQDs in sustainable development, emphasizing their low cost, environmental friendliness, and ability to be synthesized from various carbon precursors, including biomass waste. Future research directions include improving the catalytic activity of CQDs, developing scalable synthesis methods, and exploring their applications in environmental remediation. The study concludes that CQDs offer a promising solution for the degradation of organic dyes in water, with significant potential for further development and application in environmental protection.This review discusses the degradation efficiency of organic dyes using carbon quantum dots (CQDs) as photocatalysts. The increasing concern over water pollution from organic contaminants, including dyes and pharmaceuticals, has led to the need for efficient and environmentally friendly methods for their degradation. CQDs, which are carbon-based nanomaterials with sizes between 2 and 10 nm, have shown promise due to their unique optical and electronic properties, including quantum confinement effects and photoluminescence. These properties make CQDs effective for photocatalytic degradation of dyes in water. The review covers various synthesis methods for CQDs, such as hydrothermal, laser ablation, microwave-assisted, and electrochemical approaches. Each method has its advantages and disadvantages, with the hydrothermal method being the most widely used due to its simplicity and effectiveness. CQDs are also noted for their high water solubility, biocompatibility, and low toxicity, making them suitable for environmental applications. The review explores the use of CQDs in the degradation of various dyes, including methylene blue, naphthol blue black, Congo red, indigo carmine, and rhodamine B. The mechanisms of degradation involve the generation of reactive species such as hydroxyl radicals and superoxide anions, which break down the dye molecules. CQDs, when combined with other materials like TiO₂ or ZnO, enhance the photocatalytic efficiency through synergistic effects. The review also highlights the potential of CQDs in sustainable development, emphasizing their low cost, environmental friendliness, and ability to be synthesized from various carbon precursors, including biomass waste. Future research directions include improving the catalytic activity of CQDs, developing scalable synthesis methods, and exploring their applications in environmental remediation. The study concludes that CQDs offer a promising solution for the degradation of organic dyes in water, with significant potential for further development and application in environmental protection.