▎ 摘　　要

Contamination of water by pesticides is an alarming ecological problem. Pesticides are majorly used in agriculture for maximizing crop production and in public health for vector control. This has resulted in accumulation of these toxic substances in waterbodies. Such extensive use is highly detrimental to the aquatic and terrestrial ecosystem. Pesticide residues in drinking water have also become a major challenge over the last few years. Although, organophosphate pesticides have rapidly replaced more persistent organochlorines, yet the problem persists. Dichlorvos (2,2-dichlorovinyl dimethyl phosphate) is a widely used synthetic organophosphorus pesticide. It is used as a broad spectrum insecticide to control pests for public health and for product storage related applications. Heterogeneous photocatalysis is an economical process that degrades pollutants rapidly without the generation of sludge. The present study focuses on assessment of degradation efficiency of graphene oxide-TiO2 nanocomposite under irradiation (UV and visible) with varying amount of the photocatalyst.