New modification of (Platinum aminophosphate) nanoparticles surface: Superior photocatalytic properties and antimicrobial applications

Abstract

Platinum aminophosphate (PtAP) was synthesized by simple chemical method. The synthesized sample was characterized by XRD, DRS-UV, FT-IR, Raman, FE-SEM with EDX and HR-TEM techniques. The PtAP nanoparticles phase was confirmed by X-Ray diffraction patterns. Pt–O stretching vibrations and M-O-M vibrational bands of the metal oxides and phosphate groups were investigated by FT-IR spectroscopy. Bandgap energy was determined by diffuse reflectance UV–visible spectroscopy. PtAP flakes like surface morphology and elemental mapping analysis were carried out by FE-SEM with EDX. The synthesized catalyst is high photodegradation of methyl orange by visible light irradiation. As synthesized Platinum aminophosphate nanomaterial was screened by antimicrobial activity against human bacterial pathogens, like Gram-positive bacteria Staphylococcus aureus, Gram-negative bacteria Pseudomonas aeruginosa, Escherichia coli and fungal pathogen Candida albicans. These results determined best activity against all the tested human pathogens. Here, higher zone of inhibition was observed in gram positive and fungal pathogens, which results was compared to gram negative bacteria. The Platinum aminophosphate nanomaterial Minimal inhibitory concentration (MIC) was tested and its shows 99.9% of cell death from the 8 ​μg per m/L for C. albicans as the best inhibition concentration appeared.

Keywords

• Platinum aminophosphate
• Simple chemical method
• Photocatalytic activity
• Methyl orange
• Antimicrobial activity and MIC studies