Anti Bacterial Actions of Zinc Phosphate Synthesized Using Ammonium Dihydrogen Phosphate Precursor and Sensitizing Agent of Dragon Fruit Peel Extract
Nurhidayah , Abdul Haris Watoni, Muhammad Daffa Rahmatullah, Cindy Agriningsih Haruna, La Ode Ahmad Nur Ramadhan

Department of Chemistry, Faculty of Mathematics and Natural Sciences, Halu Oleo University

Abstract

The research effort of nanoparticles (NPs) with photo catalytic and antibacterial characteristics has attracted the attention of researcher including synthetic inorganic and organic nanoparticles. Synthesis and characterization of zinc phosphate using ammonium dihydrogen phosphate as a precursor, red dragon fruit peel extract (Hylocereus polyrhyzuz) as sensitizing agent and antimicrobial activity test of the material have been carried out. This study aims to obtain the Zinc Phosphate (Zn3(PO4)2) photo catalytic material and determine the antibacterial activity of Zn3(PO4)2-red Dragon Fruit Peel extract. Zn3(PO4)2 can be photocatalytically enhanced in the visible range through preparation with the addition of plant extract sensitizing agent of red dragon fruit peel (Hylocereus polyrhyzuz). The success is proven by visualization and characterization using Fourier Transform Infra Red (FTIR) and Ultra Violet-Visible (UV-Vis) spectrometer. The photocatalytic properties of a material can be determined from the particle size and the energy gap. FTIR analysis shows the presence of O-H, C=O, C-O and aromatic rings, as well as the presence of O=P-O and P-O-P groups. The results of UV-Vis analysis exhibit the absorbance values for 30 minutes tends to be stable. The results of UV-Vis spectrum characterization shows that Zn3(PO4)2 nanoparticles had a higher band gap energy value as the volume of zinc phosphate increased. Antibacterial activity test shows that the Zinc Phosphate incorporated-Red Dragon Fruit Peel Extract had moderate bacterial inhibition against Staphylococcus aureus and weak against Pseudomonas aeruginosa.

Keywords: Zinc Phosphate, ammonium dihydrogen phosphate, Dragon Fruit Peel extract, antibacterial

Topic: Materials Sciences: Synthetic and Characterization