Abstract
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•Mesoporous silica modified facial two AMDT and DMcT sensors were fabricated.•Both sensors shown high selectivity and sensitivity towards the Au(III) ions.•The interfering ions were not interfered to the Au(III) detection and recovery.
In this study, we described the development of new-developed chemical sensors to detect ultra-trace level of gold (Au(III)) ions in waste electric samples. The structured sensors were constructed using highly porous nanosphere as a carrier afterwards the decorating in the effective way with organic ligand particles of 2,5 dimercapto-1,3,4 thiadiazole (DMcT) to produce DMcT sensor and with 2-amino-5-mercapto-1,3,4-thiadiazole (AMTD) to fabricate AMDT sensor. The ability of the sensors toward the recognition of Au(III) ions was enhanced by the using of nanoparticles with their unique characters as a carrier in the sensors, hence increased the sensors capacities to sense the Au(III) ions (and thus recovering from electronic wastes) with extra sensitivity, selectivity, and a lower detection limit was achieved. Moreover, the developed chemical sensors have the ability for detecting Au(III) ions spectrophotometry even at trace concentration level of Au(III) ions (~0.22 μg/L) in rapid, straightforward procedure and fast process. The sensors were tested for detection of Au(III) ions in electronic waste samples.