Eco-Friendly Coffee Waste-Based Carbon Dots Coupled to ZnBi-Layered Double Hydroxide Heterojunction: Enhanced Control of Interfacial Charge Transfer for Highly Efficient Visible-Light Catalytic Activity

Table 2

Comparative results of 2,4-D decomposition efficiency by different catalysts.

Catalyst and light source	pH	Time (min)	2,4-D (mg/L)	Catalyst dose (g/L)	Decomposition (mineralization) (%)	Ref
CDs (2%)-ZnBi2O4/visible	4.0	120	30	1.0	91.1 (86.6)	This study
Hydrochar-ZnBi2O4/visible	4.0	135	30	1.0	90.8 (86.4)	[34]
rGO-ZnBi2O4/visible	2.45	120	30	1.0	>90.0 (83.7)	[32]
TiO2@ MgFe2O4 + H2O2/visible	2.0	240	100	0.5	>83.0 (−)	[2]
Ag3PO4-TiO2/visible	3.0	60	10	1.0	98.4 (−)	[3]
Mn-ZnO-graphene/LED	5.0	120	25	2.0	66.2 (−)	[4]
TiO2-zeolite HY/UV	3.0	300	200	2.0	100.0 (>80.0)	[5]
TiO2/UVA	5.0	180	25	1.5	97.5 (39.9)	[49]
TiO2 + H2O2/UVA	5.0	180	25	1.5	99.7 (56.0)	[49]