Green synthesis of carbon dots from biomass

Carbon dots are a class of nanomaterial that are also defined as zero-dimension nanoparticles. Quantum dots (QDs) are getting special attention due to their worthy optical properties and different applications such as bioimaging, catalysis, sensing and drug delivery. C-Dots can be prepared using the top-down and bottom-up approaches, in which the latter method is commonly used for large scale and low-cost synthesis. C-Dots can be synthesized using sustainable raw materials or green biomass since it is environmentally friendly, in-expensive and most importantly, helps the minimization of waste production. In the same line, waste biomass, fruit peel, vegetable and agricultural biomass can be used as precursors for QDs synthesis. In this article, different methods of bottom-up synthesis of carbon dots using different biomasses that have been presented mostly in the last five years are reviewed.