▎ 摘　　要

NOVELTY - Removing non-steroidal anti-inflammatory drug (NSAID), and diclofenac sodium (DFS) from water involves mixing 0.5 g melamine and 10 mL glycerol together and stirring until melamine totally dissolved in glycerol, adding 10 mL of 98% sulfuric acid to the mixture under stirring, transferring the mixture into a 50 mL polytetrafluoroethylene (PTFE) inner vessel of an autoclave and placing in an oven at 180 °C for 4 hours, obtaining a black solid product which is washed multiple times and naming as carbon nanosheets (CNS), incorporating nitrogen into CNS using melamine and reducing the as-synthesized CNS to form nitrogen-doped graphene nanosheets (NGS), taking 0.25 g CNS material in a PTFE lined stainless steel autoclave containing deionized water and heating at 140 °C for 10 hours under autogenous pressure, washing the mixture (NGS), then washing with acetone and large amount of deionized water followed by drying under ambient conditions. USE - Method used for efficiently removing non-steroidal anti-inflammatory drug (NSAID), diclofenac sodium (DFS) from water. ADVANTAGE - The method reports a low-cost, highly porous NGS from carbon nanosheets (CNS) at low temperature, CNS is produced via bottom-up one-step solvothermal synthesis using inexpensive chemical reagents such as glycerol, concentrated sulfuric acid and melamine. This results in the formation of high yield, thin-layered CNS in a very short time having high adsorption capacity. These nanosheets are further reduced through hydrothermal reduction to impart crystallinity enhance the adsorption efficiency. The graphene nanosheets has been synthesized hydrothermal by a facile one step process. The complete adsorption of 10 ppm DFS onto NGS is achieved in just 10 minutes. The NGS shows a maximum adsorption capacity of 278 mg/g for DFS removal from water. The conversion of CNS to NGS is economic, easy, quick and chemical-free.