Recovery and in‐situ reduction of precious metals by graphdiyne and graphdiyne oxide for antibacterial use
Mingjian Jiang, Yana Zhang, Ling-Shen Meng, Jing Kang, Yongjun Li, Alideertu Dong
Abstract
Abstract Based on the in‐situ self‐reduction and chemical stability, graphdiyne (GDY) and graphdiyne oxide (GDYO) are used as trapping agents to investigate the ability for recovering Au 3+ , Ag + , and Pd 2+ under different pH values and interfering ions. Under strong acidity at pH = 1, these two agents demonstrate high select recovery towards the three precious metal ions, which could be in‐situ reduced to nanoparticles (NPs). In addition, superparamagnetic Fe 3 O 4 NPs are deposited on the surfaces of GDY and GDYO. The magnetic responses enable GDY‐Fe 3 O 4 to recover precious metals conveniently and efficiently by the aid of an external magnetic field. This study also confirms the antibacterial activity of the as‐recovered NPs deposited on GDY and GDYO against Escherichia coli and Staphylococcus aureus (1 × 10 5 colony‐forming unit (CFU)·ml −1 ) , and the antibacterial rates are 100%. This strategy of recovering precious metals and subsequently reusing to combat pathogens will be of great significance for environmental remediation and biomedical applications.