Exploring the bi-functionality of g-CN-based metal sulfide (PbS) in energy conversion and antimicrobial activity

Achieving a clean environment is imperative for a green future to fight the increasing pollution by fossil fuels and on another level micro-organisms. The polymeric (graphitic-carbon nitride) g-CN-based metal sulfide provides a dual solution for a greener world for energy conversion and antibacterial agents in the growing field for antimicrobial growth of E. Coli and S. Aureus (Gram-positive and -negative). The electrochemical water splitting is sluggish because of the anodic oxygen evolution process, for this g-CN/PbS, operates as superior electrocatalyst activity shows Tafel slope on 50 mV dec⁻¹ and over-potential on 282 mV (vs RHE) at current density (j) of 10 mA cm⁻². The exceptional stability of up to 50 h in an alkaline environment highlights practical viability. The g-CN/PbS nanocomposite exhibits remarkable physical properties i.e., ECSA of 309.25 cm², a nanocrystalline size of 2.6 nm, and a high turnover frequency of 1.3040 s^–1 that make it extremely effective for OER and antimicrobial activity. Catalyst demonstrated effective antimicrobial activity by achieving inhibition zones of 29 and 17 mm toward E. Coli and S. Aureus, respectively. The bi-functionality of g-CN/PbS holds significant potential in achieving the ultimate clean environment.