Flower-like SnO2 Nanoparticle Biofabrication Using Pometia pinnata Leaf Extract and Study on Its Photocatalytic and Antibacterial Activities.

Is Fatimah,Gani Purwiandono,Ruey-An Doong,Won-Chun Oh,Sheikh Ahmad Izaddin Sheikh Mohd Ghazali,Suresh Sagadevan,Habibi Hidayat

doi:10.3390/nano11113012

Abstract

The present study reported biofabrication of flower-like SnO2 nanoparticles using Pometia pinnata leaf extract. The study focused on the physicochemical characteristics of the prepared SnO2 nanoparticles and its activity as photocatalyst and antibacterial agent. The characterization was performed by XRD, SEM, TEM, UV-DRS and XPS analyses. Photocatalytic activity of the nanoparticles was examined on bromophenol blue photooxidation; meanwhile, the antibacterial activity was evaluated against Klebsiella pneumoniae, Escherichia coli Staphylococcus aureus and Streptococcus pyogenes. XRD and XPS analyses confirmed the single tetragonal SnO2 phase. The result from SEM analysis indicates the flower like morphology of SnO2 nanoparticles, and by TEM analysis, the nanoparticles were seen to be in uniform spherical shapes with a diameter ranging from 8 to 20 nm. SnO2 nanoparticles showed significant photocatalytic activity in photooxidation of bromophenol blue as the degradation efficiency reached 99.93%, and the photocatalyst exhibited the reusability as the degradation efficiency values were insignificantly changed until the fifth cycle. Antibacterial assay indicated that the synthesized SnO2 nanoparticles exhibit an inhibition of tested bacteria and showed a potential to be applied for further environmental and medical applications.

Highlights

Introduction iationsRecently, green processing in chemical reactions and environmental applications have increasingly attracted attention
The formation of SnO2 NPs was initially monitored by the identification of surface plasmon resonance (SPR) using UV-visible spectrophotometry analysis on a HITACHI
Transmission electron microscopy (TEM) analysis proved the nanoparticles had uniform sphershapes with size ranging from 8 to 20 nm, which was confirmed with XRD analysis, finding ical shapes with size ranging from 8 to 20 nm, which was confirmed with XRD analysis, a crystallite size of 18.2 nm

Summary

Introduction

Green processing in chemical reactions and environmental applications have increasingly attracted attention. Within these schemes, studies on nanotechnology, including the exploration of synthesis, characterization, modification and application, were developed [1,2]. Metal oxide nanoparticles have been widely used as more effective photocatalysts and antibacterial agents compared to the bulk form. The size and morphology of the low dimensional metal oxide nanostructures govern the unique chemical and optical properties, and are intensively studied and give opportunity for better effectiveness. Metal oxide nanoparticles such as TiO2 , ZnO, SnO2 and ZrO2 and their combination

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