Modeling of adsorption phenomena was carried out for core-shell adsorbents with spherical, cylindrical, and slab-type morphologies. Numerical solutions adsorbates in the adsorber could be obtained as a function time by solving coupled diffusion equations to take account inert-core thickness (x’). Transient responses batch continuous adsorbers containing were predicted, assuming rectangular or L...

Understanding how adsorbates influence polaron behavior is of fundamental importance in describing the catalytic properties TiO2. Carboxylic acids adsorb readily at TiO2 surfaces, yet their on polaronic states unknown. Using UV photoemission spectroscopy (UPS), two-photon (2PPE), and density functional theory (DFT) we show that dissociative adsorption formic acetic has profound, different, effe...

Recent theoretical and experimental studies indicate that adsorbate-adsorbate interactions mediated by a solid surface can be significant enough to influence the formation of nanostructures during thin-film epitaxy. Here, we show that these electronic interactions lead to the formation of repulsive barriers surrounding small adsorbate islands at surfaces. The dependence of these barriers on isl...

This paper describes a simple and convenient strategy for reducing the dimensions of organic micro-and nanostructures on metal surfaces. By varying electrochemical desorption conditions, features patterned by dip-pen nanolithography or micro contact printing and made of linear alkanethiols or selenols can be gradually desorbed in a controlled fashion. The process is referred to as electrochemic...

Formation of partly dissociated water chains is observed on CaO(001) films upon water exposure at 300 K. While morphology and orientation of the 1D assemblies are revealed from scanning tunneling microscopy, their atomic structure is identified with infrared absorption spectroscopy combined with density functional theory calculations. The latter exploit an ab initio genetic algorithm linked to ...

Abstract The objective of this study is to explore the preparation and application sludge produced in plants drinking water treatment, remove methylene blue (MB) dye from polluted water. Adsorbate (methylene blue) prepared lab. as a stock solution. To create new adsorbents, chemical activation used has been carried out. performed by HCl H 2 O mixture . experiments were out under different bound...

This paper is reporting new finding in the field of adsorbate-adsorbate interaction for supercritical carbon dioxide adsorption by One-Kondo model analysis. Adsorption isotherms for supercritical carbon dioxide on activated carbon Filtrasorb 400 and on zeolite 13X have been evaluated and shown to demonstrate adsorption compression phenomenon at high pressure end just as in subcritical systems. ...

The adsorption characteristics study on the removal of therapeutic drug naproxen acid digested carbon waste leather were analysed by varying physico-chemical conditions. Effect particle size, adsorbent dosage, pH, temperature, initial concentration adsorbate and contact time carefully batch mode. minimum size gives maximum number surface area adsorbed more, 90.89% for 0-63 micron. Acidic pH ran...

Third-neighbor adsorbate–adsorbate interactions are included to extend the low-temperature adsorption study recently published on body-centered-cubic (110) surfaces, infinite in one direction and of finite width, M, with nonperiodic boundaries. In addition to the six phases reported earlier on the infinite two-dimensional surface (M8), 11 new phases have been found for an exhaustive total of t...