N2 and O2 adsorption isotherms in chemically modified clinoptilolite-Ca zeolites were experimentally estimated by inverse chromatography. Natural (CLINA) treated with HCl at different concentrations (H1-H4). The of on these was studied the temperature zone 398–498 K using gas This technique used a thermal-conductivity detector He as carrier gas, rate 30 mL min−1. Langmuir Henry equations to des...

This study investigates NO adsorption on Pd-exchanged chabazite (Pd/H-CHA), a promising passive NOx adsorber (PNA) for capturing cold-start emissions of gasoline- and diesel-powered vehicles. Temperature-programed desorption (TPD) IR spectroscopy are combined with theoretical calculations to elucidate how where is stored, water O2 affect this process. Pd/H-CHA produces two TPD features, around ...

bacteria! plaque is an essential factor of gingival and periodontal disease.the ability of chemical piaque control agent to prevent plaque formation is well documented compare with other mechanical plaque removal methods. the purpose of this study was to compare clinical effects of shore choice mouth rinse (h2 o2, 0.1%) with a placebo.following a period of 4 weeks, 20 subjects were allocated to...

The turnover frequency of the catalytic oxidation of CO at RuO2(110) was calculated as a function of temperature and partial pressures using ab initio statistical mechanics. The underlying energetics of the gas-phase molecules, dissociation, adsorption, surface diffusion, surface chemical reactions, and desorption were obtained by all-electron density-functional theory. The resulting CO2 format...

The design and preparation of catalysts with excellent stability high activity are critical to improving the performance lithium-oxygen (Li-O2) batteries. Heterostructural have attracted wide attention due their tunable structure effectiveness in promoting oxygen reduction reaction evolution kinetics. In this study, CuCo2S4/CoS1.097 polymetallic sulfides were proposed as effective electrocataly...

Hydrogen peroxide (H2O2) is an efficient depressant for pyrite (FeS2) flotation. However, the depressing mechanism of H2O2 not fully understood. In this paper, capacity was examined by flotation tests. Results revealed that could be inhibited at pH 6.4. The powder in solution enhanced release O2 from H2O2. concentration less than H2O2; thus, major oxidant solution. Moreover, density functional ...

We present three-dimensional simulation techniques for plasma etching processes. Models based on Langmuir-type adsorption and on ballistic particle transport at feature scale can be efficiently solved in three dimensions. Surface coverages are self-consistently calculated. The local sputter rates of ions and the fluxes of neutrals are computed using modern ray tracing algorithms. In this way an...

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Fullerene (C60)-enhanced Bi2TiO4F2 hierarchical microspheres were prepared by a facile solvothermal method. Compared to the pure Bi2TiO4F2 photocatalyst, the C60/Bi2TiO4F2 samples exhibit much stronger photocatalytic performance for degrading Rhodamine B (RhB) and Eosin Y (EY) under visible light irradiation. Such greatly enhanced photocatalytic activity may be ascribed to strong combination an...