%0 Journal Article
%T Synthesis, Characterization and Photocatalytic Application of Different Sizes of Gold Nanoparticles on 4-Nitrophenol
%A R. Seoudi
%A F. A. Al-Marhaby
%J World Journal of Nano Science and Engineering
%P 120-128
%@ 2161-4962
%D 2016
%I Scientific Research Publishing
%R 10.4236/wjnse.2016.63012
%X In this work, different sizes of gold nanoparticles were synthesized at room temperature by using trisodium citrate as a surfactant stabilizing agent and sodium borohydride as a reducing agent. Transmission Electron Microscopy (TEM) confirmed that the samples were synthesized in spherical shapes with three different particle sizes: 4 nm, 7 nm and 11 nm. Ultraviolet-visible spectra measurements were used to analyze the way that surface plasmon bands were affected by the different particles sizes. The effect of sphere size on photocatalytic reduction of 4-Nitrophenol was then studied and the rate constant of the reduction was calculated to be 0.014 s<sup>-1</sup>, 0.0091 s<sup>-1</sup> and 0.003 s<sup>-1</sup> for particles sizes of 4 nm, 7 nm and 11 nm, respectively. The results obtained indicated that small particles were more active in catalytic reduction due to their high surface energy.
%K Gold Nanoparticles
%K Surface Plasmon Band
%K Photocatalyst
%K Rate Constant
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=70822