Nanoscience and nanotechnology have changed the world. Materials with dimensions smaller than 100 nanometers are called nanomaterials. The high surface to volume ratio makes the nanomaterials suitable for various application especially photocatalytic degradation. Photo degradation is the process by which a substance is broken down into simpler compounds due to exposure to light, it also involves the chemical break down of pollutants in the presence of light. The present review explores the degradation mechanism of the nano photocatalyst as well as the performance of various nanomaterials on organic contaminants degradation.

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