Table 4. Comparison of Catalytic Performance of the Fe3O4@SiO2-NH2–Au Catalyst with the Liquid Phase Reduction of 2-Nitroaniline to o-Phenylenediamine.
| no. | catalyst | Au synthesis method | reaction conditions | completion of reaction (min) | kapp (s–1) | refs |
|---|---|---|---|---|---|---|
| 1 | Ni@Au/KCC-1 | MPTES, NaBH4 | S* = 0.126 mM/L (40 μL) | 10 | 4.7 × 10–3 | (31) |
| R = 0.5 M, 0.65 10–4 mol (0.13 mL) | ||||||
| C = 10.0 mg/mL (30 μL) | ||||||
| 2 | AuNPs having different shapes (60–270 nm) | PVP, NaBH4 | S = 0.30 mM (50 mL) | 6–18 | NM | (55) |
| R = 38 mM (50 mL) | ||||||
| C = 0.97 mg | ||||||
| 3 | gold nanocubes (61 nm), octahedra (45 nm), and rhombic dodecahedra (44 nm) | CTAC, NaBH4 | S = 1.0 mM (500 μL) | 70 | 3.1 × 10–4 | (61) |
| R = 0.1 M (1.2 mL) | 240 | 6.7 × 10–5 | ||||
| C = 102 μL for nanocubes, 95 μL for octahedra, and 347 μL for rhombic dodecahedra | 50 | 1.3 × 10–3 | ||||
| 4 | Sr/Alg/CMC/GO/Au | NaBH4 | S* = 0.1 mM (1 mL) | 2 | 4.9 × 10–3 | (62) |
| R = 0.1 M (1 mL) | ||||||
| C = 1 mg/mL | ||||||
| 5 | Au-NF (50–70 nm) | ascorbic acid, CH-CF, KBH4 | S = 1 mM/L (300 μL) | 16 | NM | (63) |
| R = 0.1 M/L (300 μL) | ||||||
| C = 0.4 mmol/L (300 μL) | ||||||
| 6 | Fe3O4@SiO2-NH2–Au (6.7 nm) | APTES, NaBH4 | S* = 0.1 mL (0.005 M) | 4.2 | 4.1 × 10–3 | this study |
| R = 1 mL (0.2 M) | ||||||
| C = 3 mg |
a
S: substrate (i.e., 4-NA); S*: (2-NA); R: reductant (NaBH4); C: catalyst; kapp = apparent rate constant; * mol/(L min); NM: not mentioned.