Environmental applications of an ultrasonically synthesized and PEG assisted Yb 2 O 3 /ZnFe 2 O 4 nanocomposite for dye and herbicide degradation and electrochemical sensing of catechol

and a limit of detection of 11.52 µM, confirming its suitability for sensitive electrochemical monitoring. The resulting binary nanocomposite can be used as a photocatalyst to effectively break down hazardous dyes and pesticides, hence enabling environmental cleanup applications.