The residue of antibiotics in the water has led to increased antibioticresistant bacteria, harm to human health, and damage to health-beneficial healthy bacteria. An idea of constructing S-scheme α-Fe 2 O 3 /g-C 3 N 4 nanocomposites is studied toward a photocatalysis application for an efficient resolution of commercial antibiotics in wastewater. Outstanding S-scheme Fe 2 O 3 /g-C 3 N 4 nanocatalysts are synthesized by a straightforward method and could easily improve the recycling property, thanks to magnetic materials. Empirical results indicate that S-scheme Fe 2 O 3 /g-C 3 N 4 photocatalysts can degrade commercial cefalexin and amoxicillin (20 mg L −1 ) under visible light, with five and nine times higher performance than that of g-C 3 N 4 , respectively. Furthermore, the detailed evidence to propose S-scheme Fe 2 O 3 /g-C 3 N 4 heterojunctions and comparison of photocatalytic performance in antibiotic degradation have also been mentioned in this study. KEYWORDS: α-Fe 2 O 3 , g-C 3 N 4 , photocatalysis, α-Fe 2 O 3 /g-C 3 N 4 , S-scheme, antibiotic degradation

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ZnO nanomaterial is a n-type semiconductor material and exits in a variety of one-dimensional nanostructures such as: nanorods, nanotubes, nanowalls, nanowires, ect… [3]. They have potential applications in making devices such as: light emiting diodes, optical waveguides, nanolaser, gas sensor, biosensor. Due to the high surface area to volume ratios, nontoxicity, chemical stability, biocompatibility, the high isoelectric point (IEP: 9.5), ect…; ZnO nanorods were largely used for biosensor. In this work, we developed enzyme electrode biosensor based on ZnO nanorods to test galactose solution by immobilizing galactose oxidase on ZnO nanorods grown on FTO substrate. The result showed that the proposed biosensor had the linear detection range from 40 to 230 mM galactose solution.