A combined photoelectrochemical and IR spectroscopic approach was used to study the photooxidation of oxalic acid on thin films consisting of oriented rutile TiO(2) nanowires (diameter: approximately 2 nm). Anodic spikes appear in the photocurrent transients particularly at low oxalic acid concentrations and point to mass transport limitations due to the presence of narrow pores (< or = 1 nm) i...

The chemisorption of various atoms (C, N, O, Cl) and molecular fragments (OH, NH, CH, NH2, CH2) on the Ag(111) surface has been studied by employing the embedded cluster and multireference singleand double-excitation configuration interaction (MRD-CI) methods. Ground and excited states of the cluster–adsorbate systems have been computed and molecular orbitals (MOs) as well as electronic charge ...

This study investigated the use of carbon-coated-sand (CCS), as a more sustainable alternative to activated carbon (AC), for removal Ni 2+ and Cu ions from an aqueous solution. The CCS was synthesized sugar sand without any additional binders then using 0.1 M H 2 SO 4 form modified version called MCSS. Activation increased specific surface area by 15-folds 0.409 (CCS) 6.183 (MCCS) m /g. Multi-l...

A composite containing cellulose (CEL) and chitosan (CS) synthesized by a simple and recyclable method by using butylmethylimmidazolium chloride, an ionic liquid, was found to exhibit remarkable enantiomeric selectivity toward the adsorption of amino acids. The highest adsorption capacity and enantiomeric selectivity are exhibited by 100% CS. A racemic amino acid can be enantiomerically resolve...

We have employed a classical molecular dynamics simulation for the direct pick-up reaction of adsorbates by very low energy (1-60 eV) ions scattered at a surface. The system investigated is the reactive ion scattering (RIS) of Cs+ with an adsorbate on a Pt(111) surface. The ion-dipole attraction between the projectile and the physisorbed adsorbate drives the abstraction reaction, in which the i...

The importance of substrate-mediated adsorbate-adsorbate interactions on electronic states has been demonstrated for Au dimers on NiAl(110) with a scanning tunneling microscope and density functional calculations. An unoccupied resonance observed in single Au atoms splits into a doublet in Au dimers. The energy splitting depends inversely on the distance between the two adatoms, revealing the r...