Nowadays, removal of pollutants from urban wastewater treatment plants (UWTPs) remains a big challenge. The macrolides antibiotics are particularly present in higher levels in unprocessed wastewater and are often partially reduced by conservative managements. The photocatalysis process was categorised amongst the miscellaneous progressive oxidation methods (AOPs) with high capacity for successful removal of pharmaceuticals from numerous aqueous matrices. In the present work and for the first time, chemical spray pyrolysis was used to synthesize CuFeAlSnS (x = 0, 0.25, 0.50, 0.75 and 1) thin films. Sprayed films were investigated using many techniques such as: MAUD software (Material Analysis Using Diffraction), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDX), spectrophotometer and Hall effect and drop shape analysis system (DSA). MAUD software revealed a polycrystalline nature for CuAlSnS (CATS) with slight shift of diffraction peaks depicted at 2θ = 27.84°, 47.03° and 55.93°, which identified respectively to (0 0 2), (1 1 0) and (1 1 2) plans. In addition, SEM images show that CuAlSnS grows with many rod-shaped structures that closely attached to each other. It is clearly seen that CATS thin film exhibited the highest extinction coefficient value (K) than other CFATS films. Additionally, a special emphasis focused on surface wettability of CFATS films showing a hydrophilic character surface using spiramycin (SPY) macrolide antibiotic liquid. Its worth mentioning that the hydrophilic type has a distinguished helpful role on the photocatalytic process that may be associated with the active surface area and the high adsorption of liquid. Based on the relationships between photocatalysis and hydrophilicity, the behaviors of SnO:F, CATS films and coupled CATS/SnO:F photocatalysis were tested using 20 mg/L of spiramycin (SPY) macrolide antibiotic in aqueous solution. Spiramycin removal competence using SnO:F, CATS films and coupled CATS/SnO:F was increased after being reused 120 min. Consequently, the current work can open a new area for effectiveness of CATS/SnO:F surface which recognized in order to manufacture a self-disinfecting and self-cleaning, removal of high antibiotics bacteria-resistance.

The authors would like to acknowledge the Deanship of Scientific Research at Umm Al-Qura University for supporting this work by Grant code: 22UQU4350568DSR02. Also, the author would thank Dr. Ziad Moussa, United Arab Emirates University, as native English specker (Canadian) for his valuable editing and revision the manuscript