Metal-free and Defect-selective Graphene Quantum Dots (GQDs) from Natural Graphite

• Metal-free, environmentally safe synthesis
• Efficient for solar hydrogen generation (29,548 μmol g−1 h−1)
• Boron-doped(B-GQDs) and Gadolinium doped GQDs(Gd-GQDs) serve as MRI
• GQDs and NGQDs serve as efficient neurotrophic agent
• GQDs and doped GQDs can serve as Theragnostic with multimodal imaging for
• Cancer therapy

Eco-friendly, low-cost method for synthesizing defect-tailored GQDs using sonication at room temperature without harmful chemicals or transition metals.

• OLEDs and optoelectronics
• Solar hydrogen production
• Cancer therapy and neurogenesis
• MRI contrast enhancement
• Grey and industrial water purification
• Biosensing and Bioimaging