Table 3 Response of AgNPs as a sensor to heavy metals under investigation
From: Green synthesis of silver nanoparticles and its environmental sensor ability to some heavy metals
Metals | Metal | Metal + AgNPs | AgNPs | |||
|---|---|---|---|---|---|---|
λ, nm | Colour | λ, nm | Colour | λ, nm | Colour | |
Cu2+ | 797 | Pale blue | 352 | Pale yellow | ||
Cd2+ | 228 | Colourless | 423 | Brownish yellow | 423 | Brownish-yellow |
Cr3+ | 411, 574 | Dark violet | 411, 574 | Brownish yellow | ||
Hg2+ | 285 | Colourless | No band | Colorless | ||
Co2+ | 304, 512 | Red | 438 | Pale red | ||
Pb2+ | 285 | Colourless | 429 | Yellowish red | ||