%0 Journal Article
%T Visible Light Hydrogen Evolution over <i>¦Á</i>-MoO</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;"> and <i>¦Á</i>-MoO</span><sub><span style="font-family:Verdana;">3</span></sub><span style="font-family:Verdana;">/ZnO Hetero-Junction
%A Kahina Bounache
%A Amel Boudjemaa
%A Souhila Boumaza
%A Meriem Haddad
%A Warda Tallas
%A Akila Belhadi
%A Mohamed Trari
%J Open Journal of Physical Chemistry
%P 144-156
%@ 2162-1977
%D 2021
%I Scientific Research Publishing
%R 10.4236/ojpc.2021.113008
%X MoO<sub>3</sub> and 5% MoO<sub>3</sub>/ZnO were prepared by impregnation method using (NH<sub>4</sub>)<sub>6</sub>Mo<sub>7</sub>O<sub>24</sub>,
4H<sub>2</sub>O as precursor and ZnO as support. The prepared samples were
characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM),
infra red (FTIR) <span style=\"font-family:;\" \"=\"\">and</span><span style=\"font-family:;\" \"=\"\"> UV-Vis diffuse reflectance (DRS)</span><span> </span><span style=\"font-family:;\" \"=\"\">spectroscopies and pho<span>to-electrochemistry.
The XRD pattern showed that the MoO<sub>3</sub> powder treated at 700&amp;deg;C is a
single-phase crystallizing in an orthorhombic structure with a direct optical
transition </span></span><span style=\"font-family:;\" \"=\"\">(</span><span style=\"font-family:;\" \"=\"\">2.70 eV</span><span style=\"font-family:;\" \"=\"\">)</span><span style=\"font-family:;\" \"=\"\">. The hetero-junction 5% MoO<sub>3</sub>/ZnO</span><span style=\"font-family:;\" \"=\"\"> was photo-electrochemically characterized to assess its feasibility for
H<sub>2</sub> production under visible light. The capacitance potential (<i>C<sup>-</sup></i><sup>2</sup><i> f</i>(<i>E</i>)) characteristic of
MoO<sub>3</sub> plotted in Na<sub>2</sub>SO<sub>4</sub>, (0.1 M) electrolyte
indicates <i>n-</i>type conduction with a flat band potential of -</span><span style=\"font-family:;\" \"=\"\"><span>0.54 V<i><sub>SCE</sub></i>. The
photocatalytic activity was performed for the photoreduction of water to
hydrogen under visible light illumination. The best performance occurs at pH ~
7 with an evolved volume of 5.9 mL.</span></span>
%K MoO&lt
%K /span&gt
%K &lt
%K sub&gt
%K &lt
%K span style=&quot
%K font-family:Verdana
%K &quot
%K &gt
%K 3&lt
%K /span&gt
%K &lt
%K /sub&gt
%K &lt
%K span style=&quot
%K font-family:Verdana
%K &quot
%K &gt
%K /ZnO
%K Hetero-Junction
%K Photocatalysis
%K Hydrogen
%K Visible Light
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=111043