Synthesis and Characterization of Nitrogen And Phosphorus Cooped Zinc Oxide Nano composite for Photo catalytic Degradation of Methylene Blue, Antimicrobial and Antioxidant Activities

Abstract

Nanotechnology has wide applications in various fields such as photocatalytic degradation, medicines, antioxidants, antimicrobials, and other fields. ZnO-NPs are the most important among the Nanoscale materials background expanding growth. In comparison, pure ZnO-NPs have been announced to have a large energy band gap, electron-hole pair rearrangement, invisible light absorption, and low photocatalytic activities which decide their capability aids. The ZnO-NPs were characterized by different techniques such as X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, ultraviolet (UV) spectroscopy, and scanning electron microscopy (SEM). In addition, ZnO-NPs can be prolonged through the combination of a small quantity of codoping of Nitrogen and phosphorus to solve these problems. We obtained the photocatalytic degradation of Methyl blue (MB) dye with pure ZnO-NPs mixed with a small amount of P and N-codoped ZnO-NCs materials. As a result, P and N-codoping ZnO-NCs reduce the energy band gap from 2.92 to 2.53 eV and substantially increase their photocatalytic activity. MB was degraded (97 %) after 80 minutes when 15 mg of P and N-codoped ZnO-NCs combined with ZnO-NPs were combined. By identification, the Nanocomposie’s photocatalytic activity was greater than that of pure ZnO-NPs. Stability enhancement and surface charge are answerable for the amazing photocatalytic improvement. As we know, this is the most important photocatalytic improvement accomplished by integrating a small amount of P and N-cooped ZnO-NCs into pure ZnO-NPs. Prepared NPs and NCs were examined for anti-oxidant properties using DPPH radical scavenging activity, the tendency to scavenge the DPPH radical was increased as the concentration of NPs and NCs increased result indicates that NCs can protect oxidation by transferring electron density from oxygen to carbon through n→π* transition. The NCs antimicrobial activity is reparable to that of ZnO-NPs, N-doped ZnO-NPs, and P-doped ZnO-NPs indicating that combination ZnO-NPs better advance the NCs antimicrobial activity. The photocatalytic degradation effectiveness in the reusability of P and N-codoped ZnO-NCs decreases in the order of 97 %, 91 % and 87% in the first, second and third cycles respectively may be due to the aggregations of waste ions and catalyst dosage indicating impurities.