Title Novel pH-sensitive nanocomposite hydrogels based on polyvinyl imidazole -graphene quantum dots for adsorption of congo red and methyl orange from aqueous solution Type of Research Presentation Keywords Nanocomposite hydrogels, N-Doped graphene quantum dot, Polyvinyl imidazole, Dye adsorption. Abstract - Researchers (First Researcher)، Massoumeh Bagheri (Second Researcher)، Maryam Hosseini (Third Researcher)، Younes Beygi khosrowshahi (Fourth Researcher)