Publications by authors named "Zoubir Derriche"
The electrocatalytic hydrogenation of Orange G is investigated using spectrophotometric experiments in laboratory cells. The working electrode consists of a thin grid coated with a layer of nickel in which fine particles of Raney nickel are dispersed. The optimal conditions of decoloration are as follows: basic pH, 0.
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- The locations of Brønsted acid sites (BAS) in medium-pore zeolites influence the ionization of para-terphenyl (PP(3)), as spatial constraints affect the stability of critical transition states.
- There is a strong synergy between the polarization energy of H(+) ions and the zeolite channel's topology, which impacts both the ionization rates and yield of PP(3).
- Spectroscopic analysis and modeling reveal that the characteristics of charge transfer and recombination vary significantly across different zeolites (H-FER, H-MFI, H-MOR), and the spatial arrangement in the channels plays a key role in decreasing charge recombination by keeping ejected electrons compartmentalized.
An amperometric sensor based on Ni(1-x)Al(x)(OH)(2)NO(3x).nH(2)O layered double hydroxide (LDH) has been developed for the electrochemical analysis in one step of two herbicides: glyphosate (N-(phosphonomethyl)glycine, Glyp) and glufosinate ((DL-homoalanine-4-yl)-methylphosphinic acid, Gluf). NiAl-LDH was prepared by coprecipitation or by electrodeposition at the Pt electrode surface.
View Article and Find Full Text PDFAdsorption of carbon dioxide by X zeolites exchanged with Ni2+ and Cr3+: isotherms and isosteric heat.
J Colloid Interface Sci
October 2004
The adsorption of CO2, at intervals of 30 K from 303 K was carried out on M(n+)X zeolites (M(n+)=Ni2+ or Cr3+) exchanged at different degrees. The structural regularity of the zeolite lattice of NaX and the existence of well-defined cavities within which the adsorbate molecules are lodged suggest that it should be possible to use various isotherm equations. Several models were thus used to describe the experimental isotherms.
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