In the present work, the suitability of Aloe vera (AV) as a ‘green reducing agent’ has been investigated for the reduction of graphene oxide (GO).

A LEED-AES study of the oxidation of Fe(100) and Fe (110) The reduction of oxidized Fe (110) by hydrogen has been studied by ellipsometry, combined with Auger electron spectroscopy and low-energy electron diffraction (LEEO). Oxide island formation occurs after partial reduction of oxidized Fe( 110) by hydrogen, as was observed with LEEO. At this stage the reaction rate becomes first order in the hydrogen pressure. When compared with the results obtained on Fe( 100), it appeared that the reaction probability and the apparent activation energy of the reduction processes are of the same order of magnitude for both surfaces. However, a striking example of plane specific reaction behavior was observed, since the reduction on Fee 100) is incomplete, approximately one monolayer of oxygen remaining on the surface, whereas on Fe( 110) the reaction proceeds quantitatively under similar reaction conditions.