Fabrication of p-n junction foam for detection of methyl parathion in seawater

Abstract Seawater detection faces the serious interference that causes sensors lose effectiveness. ZnO/NiO core-shell p-n junction nanorods decorated metal foam was successfully fabricated and used as enzymes loading matrix to immobilize acetylcholinesterase for detection of Methyl Parathion (MP) in seawater. The lowest detection limit to MP in seawater was reduced more than an order of magnitude and the anti-interference ability was enhanced significantly by introducing the p-n junction interface. The results were attributed to the formed electrons well and the built-in electric field that provided a driving force for electrons signal transform. It is a promising strategy to solve the problem of the serious interference and the high detection limit in seawater detection.