Abstract
Copper oxide-antimony oxide (Cu
O-Sb
O
) was prepared and entrapped inside Na-alginate hydrogel (Alg@Cu
O-Sb
O
). The developed Alg@Cu
O-Sb
O
was used as catalytic reactor for the reduction of 4-nitrophenol (4-NP), 2-nitrophenol (2-NP), 2,6-dinitrophenol (2,6-DNP), methyl orange (MO), congo red (CR), acridine orange (AO), methylene blue (MB) and potassium ferricyanide (K
[Fe(CN)
]). Alg@Cu
O-Sb
O
was found to be selective and more efficient for the reduction of 2-NP among all the pollutants. Therefore, 2-NP was selected for a detailed study to optimize various parameters, e.g., the catalyst amount, reducing agent concentration, 2-NP concentration and recyclability. Alg@Cu
O-Sb
O
was found to be very stable and easily recyclable for the reduction of 2-NP. The Alg@Cu
O-Sb
O
nanocatalyst reduced 2-NP in 1.0 min, having a rate constant of 3.8187 min
.