Green Synthesis of Highly Luminescent Carbon Quantum Dots from Lemon Juice

Table 1

Comparison of the QYs of C-dots prepared by various natural precursors.

Precursor	Size (nm)	Color	QYs (%)	Ref.
Apple juice	2.8 ± 0.4	Blue	6.4	[5]
Strawberry juice	5.2	Blue	6.3	[6]
Pomelo peel	2 ± 0.5	Blue	6.9	[9]
Willow bark	1–4	Blue	6.9	[10]
Watermelon	2 ± 0.5	Blue	7.1	[11]
Orange juice	1.5–4.5	Green	26	[7]
Fungus	2.3 ± 0.3	Blue	15.3	[21]
Carrot juice	2–8	Blue	5.16	[22]
Soy milk	13–40	Blue		[23]
Garlic	1–3	Blue	5.1–10.5	[24]
Onion waste	15	Blue	28	[17]
Lemon juice	3–5	Green	21.37	In this study