Visible‐Light‐Induced Rapid Elimination of Antibiotic Resistance Contaminations Using Graphitic Carbon Nitride Tailored with Carrier Confinement Domains
Hao Yang, Dongyang He, Linyi Fan, Fangyuan Cheng, Xixiu Zhou, Tong Zhou, Chuanhao Liu, Chengzhi Wang, Yanan Zhang, Jiao Qu
Abstract
Abstract Solar water disinfection facilitated by photocatalyst has been considered a viable point‐of‐use (POU) method for mitigating antibiotic resistance contaminations at the household or community levels. Here, density functional theory calculations are used to guide the fabrication of a carrier confinement domains (CCD)‐decorated graphitic carbon nitride (CN) photocatalyst. The CCD integration effectively disrupts the electron distribution symmetry of CN, amplifies its local electron density, and facilitates the formation of a long‐range ordered structure, thereby enhancing charge separation efficiency. Importantly, the CCD directs the migration of photogenerated carriers to specific regions upon light illumination, effectively minimizing their spatial proximity. As a result, the overall reactive oxygen species level of the photocatalytic system is markedly elevated, with a twelvefold increase in H 2 O 2 concentration, alongside a significant rise in •O 2 − and •OH steady‐state concentrations. Remarkably, a record‐high disinfection efficiency is attained, successfully inactivating 7 log of antibiotic‐resistant bacteria within 30 min. Additionally, the photocatalyst can be integrated into a continuous‐flow fixed‐bed reactor, facilitating clean water production for up to 60 h at a rate of 121 L m −2 day −1 , highlighting its significant potential for POU applications.