Novel Green Synthesis and Characterization of Nanopolymer Porous Gold Oxide Nanoparticles

Manal A Awad,Fatimah Al-Abbas,Khalid Mo Ortashi,Nada E Eisa,Awatif A Hendi

doi:10.4314/tjpr.v14i10.5

Abstract

Purpose: To develop a novel approach to green synthesis of nano-polymer porous gold oxide nanoparticles, and examine the effects of the temperatures on their surface.Methods: Green synthesis of nano-polymer porous gold oxide nanoparticles (GONPs) using cetyle trimethylammonium bromide (CTAB) surfactant with a mixture of Olea europaea fruit and Acacia Nilotica extracts, was performed using sol-gel method. The nanoporous particles were characterized by UV (ultraviolet (UV) visible spectroscopy and dynamic light scattering (DLS) while a zetasizer was applied to determine their average particle size. Their surface morphology and shape were assessed by transmission electron microscopy (TEM) and scanning election microscopy (SEM) while surface area was measured using nitrogen gas adsorption method.Results: TEM and SEM images showed a smooth, cylindrical or spherical, and cluster shapes, and porous surface morphology. Increase in calcination temperature resulted in increase in surface area and pore volume of nanoparticles. This feature yielded GONPs that were unique with a high surface area of 146.706 m2/g.Conclusion: The approach used in this study constitutes a new and rapid green synthesis of porous nanoparticles of gold oxide under simple conditions. Furthermore, increase in GONPs surface area is enhanced by increase in calcination temperature.Keywords: Gold oxide, Nanoporous, Green synthesis, Olea europaea, Acacia Nilotica, Surface area, Nanopolymer, Surface morphology

Highlights

In recent years, nanomaterials have been a core focus of nanoscience and nanotechnology: an ever-growing multidisciplinary field of study attracting tremendous interest, investment and effort in research and development around the world
The aim of this study is to present a novel green synthesis of gold oxide nanoporous particles (GONPs) using surfactant cetyle trimethylammonium bromide (CTAB) with mix of Olea europaea fruit and Acacia nilotica extracts and few drops of sodium chloride under high temperature; and study their characterization
The approach entailed the production of green nano-polymer porous gold oxide nanoparticles (GONPs) as follows: GONPs were synthesized by adding 7 ml of aqueous solution of (5:5) mix of Olea europaea fruit and Acacia nilotica extracts to the aqueous solution of: 0.25 mole/L colloidal chloroauric acid (HAuCl4), 0.05 mole/L cetyle trimethylammonium bromide (CTAB) under high temperature: 350 °C for 10 min, and adding 3 drops of sodium chloride

Summary

INTRODUCTION

Nanomaterials have been a core focus of nanoscience and nanotechnology: an ever-growing multidisciplinary field of study attracting tremendous interest, investment and effort in research and development around the world. Many inorganic nanoporous materials are made of oxides They have: a high surface to volume ratio, a high surface area and large porosity, and a very ordered uniform pore structure. They are often non-toxic, inert, and chemically and are thermally stable [1]. Gold is an inert metal with high chemical stability due to its high surface-to-volume ratio This enhances physical and chemical characteristics not possible with the bulk material and attracts distinct attention from the scientific and industrial communities. Pore size distributions were derived from desorption isotherms at P/Po of 0.3 using Barrett JoynerHalenda (BJH) method

RESULTS

DISCUSSION

CONCLUSION

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