Green synthesis of zinc oxide nanoparticles using Phoenix dactylifera waste as bioreductant for effective dye degradation and antibacterial performance in wastewater treatment
There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
Abstract
Production of multi-functional zinc oxide nanoparticles (ZnO-NPs) for wastewater treatment
through green-approaches is a desirable alternative for conventional synthesis routes.
Biomass waste valorization for nanoparticles synthesis has received increased research
attention. The present study reports date pulp waste (DPW) utilization as an effective
bio-reductant for green-synthesis of ZnO-NPs. A simple and eco-friendly process with
low reaction time and calcination temperature was adopted for DPW mediated ZnO-NPs
(DP-ZnO-NPs) synthesis. Microscopic investigations of DP-ZnO-NPs confirmed the non-agglomeration
and spherical nature of particles with mean diameter of 30 nm. EDX and XPS analysis
defined the chemical composition and product purity of DP-ZnO-NPs. UV and photoluminescence
studies exhibited surface plasmonic resonance at 381 nm and fluorescent nature of
DP-ZnO-NPs. FTIR studies established a formation mechanism outline for DP-ZnO-NPs.
XRD and Raman investigations confirmed the crystalline and hexagonal wurtzite phase
of DP-ZnO-NPs. DSC/TG analysis displayed the thermal stability of DP-ZnO-NPs with
<10 wt% loss upto 700 °C. Photocatalytic degradation of hazardous methylene blue and
eosin yellow dyes using DP-ZnO-NPs, showed rapid decomposition rate with 90 % degradation
efficiency. Additionally, DP-ZnO-NPs demonstrated significant antibacterial effects
on various pathogenic bacteria in terms of zone-of-inhibition measured by disc-diffusion
method. Thus, the as-prepared DP-ZnO-NPs is suitable for industrial wastewater treatment.