Open AccessFabrication of Nano Particle Titanium Dioxide via Acidic and Alkaline Electrolytes
Author(s) -
Alaba O. Araoyinbo,
Olugbenga Adeshola Omotosho,
Sunday A. Afolalu,
M. A. Fajobi
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1107/1/012156
Subject(s) - anatase , materials science , chemical engineering , titanium dioxide , rutile , electrolyte , anodizing , nanoparticle , inorganic chemistry , sodium hydroxide , titanium , photocatalysis , nanotechnology , chemistry , metallurgy , electrode , organic chemistry , aluminium , engineering , catalysis
In this study, titanium dioxide nano particles were produced by an electrochemical process in a strongly acidic (pH1) and alkaline (pH9) electrolytes. The anodization of titanium foil in an electrolyte produces an oxide form of the metal when an applied potential is supplied to the metal that is in contact with the aqueous solution. The electrolyte type is important in the formation of a nanotubes, nanopores or nano particles on the surface of the metal. The applied potential was 20 V from a dc supply and the electrolyte conditions were adjusted with the use of aqueous sodium hydroxide pellets. The heat-treated Titanium dioxide nano particles are known to possess photocatalytic capabilities for purification and destruction of microorganisms in contaminated solutions. In order to produce the nanoparticles at pH1, an aqueous hydrofluoric acid electrolyte was initially prepared and for pH9 a separately prepared HF solution was adjusted with sodium hydroxide pellets until the pH value was achieved. After the anodization process the heat treatment of the samples was performed at 300, 500, and 700 °C to observe the phase transformation from an amorphous nanoparticle to anatase and rutile phase. The morphology testing was by field emission-scanning electron microscope (FE-SEM) machine to observe the presence of the nano particles at the substrate surface. The phase transformation was characterized with the use of an X-ray differential (XRD) to identify the presence of anatase and the rutile phases.