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Artigos de revistas sobre o tema "Local desorption"

Autor: Grafiati

Publicado: 31 de agosto de 2024

Última modificação: 31 de julho de 2025

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1

Barbero, Giovanni, Antonio M. Scarfone, and Luiz R. Evangelista. "The Kinetics of Sorption–Desorption Phenomena: Local and Non-Local Kinetic Equations." Molecules 27, no. 21 (2022): 7601. http://dx.doi.org/10.3390/molecules27217601.

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The kinetics of adsorption phenomena are investigated in terms of local and non-local kinetic equations of the Langmuir type. The sample is assumed in the shape of a slab, limited by two homogeneous planar-parallel surfaces, in such a manner that the problem can be considered one-dimensional. The local kinetic equations in time are analyzed when both saturation and non-saturation regimes are considered. These effects result from an extra dependence of the adsorption coefficient on the density of adsorbed particles, which implies the consideration of nonlinear balance equations. Non-local kinet

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2

Shen, Maoliang, Zhonggang Huo, Longyong Shu, Qixian Li, Pengxin Zhang, and Weihua Wang. "The Pore Structure Multifractal Evolution of Vibration-Affected Tectonic Coal and the Gas Diffusion Response Characteristics." Processes 12, no. 8 (2024): 1701. http://dx.doi.org/10.3390/pr12081701.

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Vibrations caused by downhole operations often induce coal and gas outburst accidents in tectonic zone coal seams. To clarify how vibration affects the pore structure, gas desorption, and diffusion capacity of tectonic coal, isothermal adsorption-desorption experiments under different vibration frequencies were carried out. In this study, high-pressure mercury intrusion experiments and low-pressure liquid nitrogen adsorption experiments were conducted to determine the pore structures of tectonic coal before and after vibration. The pore distribution of vibration-affected tectonic coal, includi

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3

Delfino, Francesco, Carles Ros, Sidney M. Palardonio, et al. "Multi-methodological analysis of hydrogen desorption from graphene." Carbon 227 (June 30, 2024): 119211. https://doi.org/10.1016/j.carbon.2024.119211.

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Chemisorption of hydrogen on graphene has been extensively investigated in last decades, but the reported values of over several eV, depending on different factors, such as the local structural environment, substrates or previously bound hydrogen. In this work, we combine Temperature-Programmed Desorption experiments with simulations using empirical reactive force fields and Density Functional Theory calculations. We observe that desorption occurs through processes with different activation energies, which we are able to identify by analyzing simulation data and post-processing exper

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4

Seyedvakili, Farnaz, and Mohammad Samipoorgiri. "Thermo-kinetic investigation of heavy metal ions adsorption onto lignin considering coupled adsorption–desorption mechanisms: Modeling and experimental validation." International Journal of Modeling, Simulation, and Scientific Computing 09, no. 02 (2018): 1850014. http://dx.doi.org/10.1142/s1793962318500149.

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A coupled adsorption–desorption thermo-kinetic model is developed incorporating both adsorption and desorption reactions. A local pseudo-equilibrium condition at the interface of adsorbent and adsorbate bulk phases was used as isotherm equation which can even be applied for multi-pollutants scenarios. The developed model is then validated using collected experimental data of heavy metal ions (Pb, Cu, Cd, Zn, and Ni). Comparisons were made for a number of isotherm and kinetic models to examine the performance of the proposed model. The developed model revealed desirable accuracy and superiority

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5

Xia, Qibin, Zhong Li, Hongxia Xi, and Kefeng Xu. "Activation Energy for Dibenzofuran Desorption from Fe3+/TiO2 and Ce3+/TiO2 Photocatalysts Coated onto Glass Fibres." Adsorption Science & Technology 23, no. 5 (2005): 357–66. http://dx.doi.org/10.1260/026361705774355469.

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In this work, TiO2, Fe3+/TiO2 and Ce3+/TiO2 photocatalytic films were respectively immobilized on glass fibres via the sol—gel technique to prepare supported photocatalysts. Temperature programmed desorption (TPD) experiments were conducted to measure the TPD curves for the removal of dibenzofuran from these photocatalysts, from which the activation energy for dibenzofuran desorption from the photocatalyst surfaces was estimated. The results showed that the activation energies for dibenzofuran desorption from the photocatalysts TiO2, Ce3+/TiO2 and Fe3+/TiO2 coated separately onto the glass fib

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6

Mori, G., M. Lazzarino, D. Ercolani, L. Sorba, S. Heun, and A. Locatelli. "Desorption dynamics of oxide nanostructures fabricated by local anodic oxidation nanolithography." Journal of Applied Physics 97, no. 11 (2005): 114324. http://dx.doi.org/10.1063/1.1923165.

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7

Rosa, Luis G., P. A. Jacobson, and P. A. Dowben. "Evidence for an Influence of Local Dipole Excitations in Thermal Desorption." Journal of Physical Chemistry B 110, no. 15 (2006): 7944–50. http://dx.doi.org/10.1021/jp054929n.

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8

Zavorotynska, O., I. Saldan, S. Hino, T. D. Humphries, S. Deledda та B. C. Hauback. "Hydrogen cycling in γ-Mg(BH4)2 with cobalt-based additives". Journal of Materials Chemistry A 3, № 12 (2015): 6592–602. http://dx.doi.org/10.1039/c5ta00511f.

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Hydrogen desorption and absorption properties of magnesium borohydride (Mg(BH<sub>4</sub>)<sub>2</sub>) were studied for three cycles. Effect of cobalt additives and their local structure upon cycling were investigated in detail.

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9

Бернацкий, Дмитрий Петрович, and Виктор Георгиевич Павлов. "FIELD DESORPTION MICROSCOPY OF CARBON-COATED FIELD ELECTRON EMITTERS." Physical and Chemical Aspects of the Study of Clusters, Nanostructures and Nanomaterials, no. 13 (December 23, 2021): 25–31. http://dx.doi.org/10.26456/pcascnn/2021.13.025.

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Полевые электронные эмиттеры в форме металлического острия с пленкой углерода на поверхности обладают рядом перспективных эксплуатационных свойств. Характеристики эмиттера зависят от фазового состава, толщины и однородности пленки. Определение параметров пленок толщиной в один или несколько моноатомных слоев представляет определённые трудности. В данной работе образование и характеристики углеродных наноструктур на поверхности полевых эмиттеров из иридия и рения исследуются с помощью полевой десорбционной микроскопии непрерывного режима. На полевых десорбционных изображениях области углеродных

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10

Sonobe, Satoshi, Yosuke Shibata, Yusuke Asakuma, Anita Hyde, Cuong Nguyen, and Chi Phan. "A dimensionless number for microwave non-equilibrium local heating through surfactant desorption." Colloids and Surfaces A: Physicochemical and Engineering Aspects 591 (April 2020): 124560. http://dx.doi.org/10.1016/j.colsurfa.2020.124560.

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11

Li, Chun, Zejun Zhang, and Lars Heinke. "Mass transfer of toluene in a series of metal–organic frameworks: molecular clusters inside the nanopores cause slow and step-like release." Physical Chemistry Chemical Physics 24, no. 6 (2022): 3994–4001. http://dx.doi.org/10.1039/d1cp05560g.

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Toluene forms dimers in sufficiently large pores of MOFs of UiO-type. During the release process, the dimer break-up rather than the diffusion is rate limiting, causing a step-like desorption kinetics with a local maximum of the release rate.

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12

Lenzi, Ervin Kaminski, Derik William Gryczak, Luciano Rodrigues da Silva, Haroldo Valentin Ribeiro, and Rafael Soares Zola. "Diffusion in a Comb-Structured Media: Non-Local Terms and Stochastic Resetting." Quantum Reports 7, no. 2 (2025): 20. https://doi.org/10.3390/quantum7020020.

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We examine the dynamics of a system influenced by a backbone structure, incorporating linear non-local terms that account for both irreversible and reversible processes, such as absorption and adsorption–desorption. Additionally, we introduce stochastic resetting to analyze its effects on the system’s behavior from both analytical and numerical perspectives. Our findings reveal a rich spectrum of dynamics, emphasizing connections to anomalous diffusion and providing new insights into transport phenomena in complex environments.

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13

Xia, Tian Xiang, Jue Jun Yao, Mao Sheng Zhong, and Xiao Yang Jia. "Field Study on Remediation of PAHs Contaminated Soil by Ex Situ Technologies at a Coking Site." Advanced Materials Research 773 (September 2013): 744–48. http://dx.doi.org/10.4028/www.scientific.net/amr.773.744.

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Decontamination level and residual amount of polycyclic aromatic hydrocarbons (PAHs) were investigated by ex-situ remediation technologies including biopile, soil washing and thermal desorption in a field level. After the remediation, 16 USEPA priority PAHs were decontaminated from 99.3% to 99.9% for thermal desorption, from 17.9% to 82.1% for biopile and from-27.6% to 84.3% for soil washing. Residual PAHs amount in soils by thermal desorption was below the local soil screening level, differently from that by biopile and soil washing. Especially for high molecular weight PAHs, i.e. 5-6 rings P

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14

Заика, Ю. В., Е. К. Костикова та Ю. С. Нечаев. "Пики термодесорбции водорода: моделирование и интерпретация". Журнал технической физики 91, № 2 (2021): 222. http://dx.doi.org/10.21883/jtf.2021.02.50355.208-20.

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Various models of hydrogen thermal desorption peaks are analyzed. The dynamics model of the volume-averaged concentration with a continuum parameter allows integrally taking into account the degree of dominance of the limiting factors (diffusion and recombination of atoms into molecules during desorption). An analytical criterion for peaks symmetry is proposed in the context of comparison with the method of decomposing the component spectrum into the sum of Gaussian. Modifications of the Kissinger method for estimating the activation energy of desorption in experiments with several heating rat

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15

Tong, S. Y., and H. Huang. "Time-Reversed Internal-Source Holography." Surface Review and Letters 05, no. 05 (1998): 971–75. http://dx.doi.org/10.1142/s0218625x98001316.

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We have derived an expression for incident-beam-induced fine structures at a local site. We show that using time-reversal arguments, local incident-beam-induced fine structures are equivalent to photoelectron holography with an isotropic reference wave. We suggest that positron-beam-induced desorption or Auger fine structures offer attractive alternatives to using electron beams because the positron-atom scattering factor contains less angular anisortropy and the multiple scattering is weaker.

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16

Nechaev, Yury S., Evgeny A. Denisov, Alisa O. Cheretaeva, et al. "On the Problem of “Super” Storage of Hydrogen in Graphite Nanofibers." C 8, no. 2 (2022): 23. http://dx.doi.org/10.3390/c8020023.

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This article is devoted to some fundamental aspects of “super” storage in graphite nanofibers (GNF) of “reversible” (~20–30 wt.%) and “irreversible” hydrogen (~7–10 wt.%). Extraordinary results for hydrogen “super” storage were previously published by the group of Rodriguez and Baker at the turn of the century, which been unable to be reproduced or explained in terms of physics by other researchers. For the first time, using an efficient method of processing and analysis of hydrogen thermal desorption spectra, the characteristics of the main desorption peak of “irreversible” hydrogen in GNF we

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17

Опенов, Л. А., та А. И. Подливаев. "Влияние дегидрирования графана на его механические и электронные свойства". Физика и техника полупроводников 52, № 6 (2018): 614. http://dx.doi.org/10.21883/ftp.2018.06.45925.8622.

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AbstractThe effect of the desorption of hydrogen on the mechanical characteristics and electronic structure of the armchair conformation of graphane is studied in the context of the nonorthogonal tight-binding model. It is shown that the mechanical stiffness and the Poisson ratio nonmonotonically depend on the hydrogen content and take minimum values at a hydrogen vacancy content of ~50% and ~30%, respectively. As hydrogen is desorbed, the characteristic peaks of the phonon density of states are rapidly reduced. In the initial stage of desorption, local energy levels are formed in the band gap

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18

Костина, Ирина, Irina Kostina, Вера Молвинских, et al. "COMPARATIVE CHARACTERISTICS OF PHYSICO-CHEMICAL PROPERTIES OF DRUGS TOPICAL APPLICATION FOR THE PREVENTION OF COMPLICATIONS OF TOOTH EXTRACTION." Actual problems in dentistry 14, no. 4 (2018): 64–70. http://dx.doi.org/10.18481/2077-7566-2018-14-4-64-70.

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Background. A comparative study of the dynamics of iodine desorption from drugs containing iodoform and used after tooth extraction to preserve blood clots and prevention, treatment of inflammatory complications. This took into account the type and form of drugs. The content and desorption of iodine determine the duration of local exposure to the drug on the tissues of the tooth well. Objectives. To study the physico-chemical properties of iodoform containing topical preparations for the prevention and treatment of alveolitis of the jaw. Methods. The objects of the study were complex multicomp

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19

Wang, Mei, Deyang Kong, Lang Liu, Guoming Wen, and Fan Zhang. "In Situ Conductive Heating for Thermal Desorption of Volatile Organic-Contaminated Soil Based on Solar Energy." Sustainability 16, no. 19 (2024): 8565. http://dx.doi.org/10.3390/su16198565.

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A novel conductive heating method using solar energy for soil remediation was introduced in this work. Contaminated industrial heritage sites will affect the sustainable development of the local ecological environment and the surrounding air environment, and frequent exposure will have a negative impact on human health. Soil thermal desorption is an effective means to repair contaminated soil, but thermal desorption is accompanied by a large amount of energy consumption and secondary pollution. Therefore, a trough solar heat collection desorption system (TSHCDS) is proposed, which is applied t

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20

Peksa, Ladislav, Tomas Gronych, and Petr Řepa. "The influence of a local-induced desorption on pressure in an uhv system." Vacuum 43, no. 5-7 (1992): 695–98. http://dx.doi.org/10.1016/0042-207x(92)90111-9.

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21

Wilhelm, Thomas, and Gunther Wittstock. "Patterns of functional proteins formed by local electrochemical desorption of self-assembled monolayers." Electrochimica Acta 47, no. 1-2 (2001): 275–81. http://dx.doi.org/10.1016/s0013-4686(01)00566-7.

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22

Ageev, V. N., Yu A. Kuznetsov, B. V. Yakshinskii, and T. E. Madey. "Electron stimulated desorption of alkali metal ions and atoms: Local surface field relaxation." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 101, no. 1-2 (1995): 69–72. http://dx.doi.org/10.1016/0168-583x(95)00286-3.

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23

Helard, Denny, Shinta Indah, Chintia Maya Sari, and Hestia Mariesta. "The Adsorption and Regeneration of Natural Pumice as Low-Cost Adsorbent for Nitrate Removal From Water." Journal of Geoscience, Engineering, Environment, and Technology 3, no. 2 (2018): 86. http://dx.doi.org/10.24273/jgeet.2018.3.2.1545.

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The potential of adsorption and regeneration of Indonesian natural pumice to remove nitrate from aqueous solution was studied in multiple adsorption-desorption cycles. Batch experiments were performed to examine the effect of various experimental parameters on the removal of nitrate. The optimum condition of nitrate removal by natural pumice were obtained at 3 of pH solution, 0.3 g/L of adsorbent dose, 30 min of contact time, <63 μm of particle size, and 90 mg/L of nitrate concentration with 54.79% of removal efficiency and 164.37 mg/g of nitrate uptake. The experimental data obtained were

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24

Inoue, Eri, and Kiminori Sato. "Study of local structure caused by pre-thermal treatment for magnesium oxide." Journal of Physics: Conference Series 3029, no. 1 (2025): 012017. https://doi.org/10.1088/1742-6596/3029/1/012017.

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Abstract Magnesium oxide (MgO) was subjected to pre-thermal treatment to gain an insight into the local molecular structures associated with direct air capture (DAC) of carbon dioxide (CO2) from the atmosphere. After pre-thermal treatment, N2 gas adsorption (desorption) experiments at 77 K were conducted together with positron lifetime spectroscopy. Fourier transform infrared (FT-IR) spectroscopy was complementarily conducted to identify carbonate species for the samples, which were exposed to air successively to the pre-thermal treatment. The results imply that open spaces revealed by positro

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25

Moghanloo, R. Ghanbarnezhad, and F. Javadpour. "Applying Method of Characteristics to Determine Pressure Distribution in 1D Shale-Gas Samples." SPE Journal 19, no. 03 (2013): 361–72. http://dx.doi.org/10.2118/168218-pa.

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Summary This paper examines application of the method of characteristics (MOC) to determine pressure distribution in a 1D matrix of shale gas. Because of gas expansion and local desorption in shale gas, pressure distribution changes during production. We developed a semianalytic MOC solution of gas flow in shale by use of the analogous-continuum approximation (apparent permeability). The MOC solution is derived with the inclusion of compressibility, gas-slippage effect, and desorption. Through quantitative comparison of pressure profiles and history plots, we used a simulation approach to veri

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26

Skakauskas, Vladas, and Pranas Katauskis. "On the kinetics of the Langmuir-type heterogeneous reactions." Nonlinear Analysis: Modelling and Control 16, no. 4 (2011): 467–76. http://dx.doi.org/10.15388/na.16.4.14089.

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In this paper we investigate three two-dimensional in space mathematical models of the kinetics of unimolecular heterogeneous reactions proceeding onto planar surfaces. All models include the diffusion of the reactant from a bounded vessel towards an adsorbent, adsorption of the molecules of the reactant, their desorption, conversion (reaction) of the adsorbate into a product, instantaneous product desorption, and the diffusion of the product from the adsorbent into the same vessel. One of these models is based on the Langmuir-type kinetics of the surface reactions, the other one is based on t

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27

Robinet, J. C., and M. Rhattas. "Détermination de la perméabilité non saturée des matériaux argileux à faible porosité." Canadian Geotechnical Journal 32, no. 6 (1995): 1035–43. http://dx.doi.org/10.1139/t95-100.

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The presence of impermeable natural or artificial clayey layers plays a fundamental role in protecting ground water from pollution. In the case of low porosity and partially saturated clays, the experimental determination of transfer coefficient is particularly difficult because of a considerable reduction in hydraulic head and of water–particle interactions that reduce the interstitial water mobility. Experimental work was carried out to obtain, in a simple way, the hydrodynamic characteristics of two clayey formations: Boom and Bassin Parisien. The hydraulic profiles were determined by soaki

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28

Čapek, Pavel, and Karel Klusáček. "Kinetically induced multiple steady states during acetylene hydrogenation." Collection of Czechoslovak Chemical Communications 55, no. 7 (1990): 1708–20. http://dx.doi.org/10.1135/cccc19901708.

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An isothermal reaction model of acetylene hydrogenation on palladium catalyst is described. Steady-state solutions of the mass balances in a CSTR display regions of multiplicity caused by the very distinct rate and strength of adsorption and desorption of acetylene and hydrogen, respectively. Uniqueness and local stability of this model are investigated numerically; oscillatory behaviour is predicted to be absent for typical conditions.

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29

Sekiguchi, T., Y. Baba, I. Shimoyama, and K. G. Nath. "Local bonding states of ion-irradiated graphite characterized by photon-stimulated desorption (PSD) spectroscopy." Journal of Electron Spectroscopy and Related Phenomena 144-147 (June 2005): 437–41. http://dx.doi.org/10.1016/j.elspec.2005.01.156.

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30

Miyauchi, Naoya, Tomoya Iwasawa, Yoshiharu Murase, et al. "Visualization of local hydrogen diffusion in stainless steel using time resolved electron stimulated desorption." Applied Surface Science 527 (October 2020): 146710. http://dx.doi.org/10.1016/j.apsusc.2020.146710.

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31

Fan, Chao, Xin Ju, and Chubin Wan. "Local and crystal structure of Mg1.9Al0.1Ni hydrogen storage alloys during hydrogen absorption–desorption cycling." International Journal of Hydrogen Energy 35, no. 15 (2010): 8044–48. http://dx.doi.org/10.1016/j.ijhydene.2010.02.117.

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Tosto, Sebastiano, Philippe Knauth, and Maria Luisa Di Vona. "Proposed Model of Water Adsorption/Desorption in a PEM Membrane." Defect and Diffusion Forum 297-301 (April 2010): 209–14. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.209.

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This paper describes the processes of water adsorption and desorption in PE membranes for fuel cells. A simple equation is inferred assuming that the surface of the membrane is uniformly covered by adsorbed molecules to an average depth of some monolayers. The adsorption depth is only controlled by diffusion of adsorbate from the surface towards the bulk through a two-layer or multi-layer mechanisms; so the empty sites formed at the surface can accept further molecules of water. If the diffusion rate is fast enough, cumulative water uptake occurs. The uptake kinetics is described considering t

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Joyce, B. A., J. Zhang, A. G. Taylor, and A. K. Lees. "A Reflection High Energy Electron Diffraction–Reflectance Anisotropy Spectroscopy Study of Silicon Growth Dynamics During Gas Source Molecular Beam Epitaxy from Silanes." Surface Review and Letters 05, no. 03n04 (1998): 761–67. http://dx.doi.org/10.1142/s0218625x98001146.

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Molecular beam epitaxy (MBE) provides an ideal experimental vehicle for the in situ study of thin film growth dynamics. By using a combination of reflection high energy electron diffraction (RHEED) and reflectance anisotropy (difference) spectroscopy [RA(D)S], it is possible to separate morphological (long range order) and local electronic structure effects, which we demonstrate with the growth of silicon films from disilane ( Si 2 H 6) on Si(001) (2 × 1)+(1 × 2) reconstructed surfaces. The rate-limiting step in Si growth from both monosilane ( SiH 4) and disilane is the desorption of molecula

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Skryabina, N. E., Vladimir M. Pinyugzhanin, and Daniel Fruchart. "Relationship between Micro-/Nano-Structure and Stress Development in TM-Doped Mg-Based Alloys Absorbing Hydrogen." Solid State Phenomena 194 (November 2012): 237–44. http://dx.doi.org/10.4028/www.scientific.net/ssp.194.237.

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In the most recent years, MgH2has attracted considerable attention for reversible hydrogen storage purposes because of a large 7.6 w% H-uptake, single plateau reaction at low pressure and abundance of metal. If the Mg ↔ H reactions take place at rather high temperature (> 300°C), the kinetic remains very low. However, early transition metal based additives (Ti, V, Nb...) improve dramatically the kinetics of hydrogen absorption/desorption, while having no essential impact on the reversible sorption capacity. Systematic analysis of many experimental data led to question chemical, physical, me

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Lenzi, Ervin K., Aloisi Somer, Rafael S. Zola, Luciano R. da Silva, and Marcelo K. Lenzi. "A Generalized Diffusion Equation: Solutions and Anomalous Diffusion." Fluids 8, no. 2 (2023): 34. http://dx.doi.org/10.3390/fluids8020034.

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We investigate the solutions of a generalized diffusion-like equation by considering a spatial and time fractional derivative and the presence of non-local terms, which can be related to reaction or adsorption–desorption processes. We use the Green function approach to obtain solutions and evaluate the spreading of the system to show a rich class of behaviors. We also connect the results obtained with the anomalous diffusion processes.

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Кузнецов, Ю. А., та М. Н. Лапушкин. "Влияние температуры на электронно-стимулированную десорбцию атомов лития с поверхности интерметаллидов Li-=SUB=-x-=/SUB=-Au-=SUB=-y-=/SUB=-". Физика твердого тела 65, № 7 (2023): 1216. http://dx.doi.org/10.21883/ftt.2023.07.55848.64.

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The effect of temperature on the electron-stimulated desorption of lithium atoms from the surface of 2D semiconductor LixAuy intermetallic compounds in the temperature range from 160 to 300 K was studied. LixAuy intermetallic compounds were formed during the deposition of lithium atoms on gold film 2 monolayers thick at room temperature. An island mechanism for the formation of LixAuy intermetallic compounds has been proposed. The decrease in the yield of electronically stimulated desorption of lithium atoms from the surface of LixAuy 2D semiconductor intermetallic compounds with decreasing te

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Ju, Shin-Pon, and Cheng-I. Weng. "Investigation of the local structure variance of water molecules in laser-induced thermal desorption process." Applied Surface Science 230, no. 1-4 (2004): 179–90. http://dx.doi.org/10.1016/j.apsusc.2004.02.047.

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Lacin, Oral, Bahar Bayrak, Ozlem Korkut, and Enes Sayan. "Modeling of adsorption and ultrasonic desorption of cadmium(II) and zinc(II) on local bentonite." Journal of Colloid and Interface Science 292, no. 2 (2005): 330–35. http://dx.doi.org/10.1016/j.jcis.2005.05.092.

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Novickis, Richard W., Marcos V. Surmani Martins, Leila F. de Miranda, Roberto R. Ribeiro, Laureano Silva, and Antônio Hortêncio Munhoz Jr. "Development of Nanosystems to Release Atenolol." Advances in Science and Technology 86 (September 2012): 102–7. http://dx.doi.org/10.4028/www.scientific.net/ast.86.102.

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Abstract: The structure of aluminum monohydroxide resulting from synthesis by ammonium hydroxide with aluminum chloride (or aluminum nitrate, for example) by a sol-gel process, gives a purified and chemically inert material with many applications possibilities because of its great specific surface area. A pseudoboehmite is the choice in this project for adsorption/desorption of atenolol. The molecular interaction with the pseudoboehmite substrate was studied by FTIR (Infrared Spectroscopy), DSC (Scanning electron /TG Thermogravimetry), UV-vis (Ultraviolet-visible spectroscopy) and SEM (Scannin

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Swearer, Dayne F., Hangqi Zhao, Linan Zhou, et al. "Heterometallic antenna−reactor complexes for photocatalysis." Proceedings of the National Academy of Sciences 113, no. 32 (2016): 8916–20. http://dx.doi.org/10.1073/pnas.1609769113.

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Metallic nanoparticles with strong optically resonant properties behave as nanoscale optical antennas, and have recently shown extraordinary promise as light-driven catalysts. Traditionally, however, heterogeneous catalysis has relied upon weakly light-absorbing metals such as Pd, Pt, Ru, or Rh to lower the activation energy for chemical reactions. Here we show that coupling a plasmonic nanoantenna directly to catalytic nanoparticles enables the light-induced generation of hot carriers within the catalyst nanoparticles, transforming the entire complex into an efficient light-controlled reactiv

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Sarraj, Rihem, Amir Kessentini, Tarek Hassine, Ali Algahtani, and Fehmi Gamaoun. "Hydrogen Effect on the Cyclic Behavior of a Superelastic NiTi Archwire." Metals 9, no. 3 (2019): 316. http://dx.doi.org/10.3390/met9030316.

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In this work, we are interested in examining the strain rate effect on the mechanical behavior of Ni–Ti superelastic wires after hydrogen charging and ageing for 24 h. Specimens underwent 50 cycles of loading-unloading, reaching an imposed deformation of 7.6%. During loading, strain rates from 10−4 s−1 to 10−2 s−1 were achieved. With a strain rate of 10−2 s−1, the specimens were charged by hydrogen for 6 h and aged for one day showed a superelastic behavior marked by an increase in the residual deformation as a function of the number of cycles. In contrast, after a few number of cycles with a

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Esteve-Turrillas, Francesc A., Agustín Pastor, and Miguel de la Guardia. "Low temperature headspace desorption of volatile organic compounds trapped in air sampling solid-supports." Environmental Chemistry 6, no. 5 (2009): 452. http://dx.doi.org/10.1071/en09013.

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Environmental context. The monitoring of volatile organic compounds (VOCs) in air is of great importance for air quality on both local and global scales. The determination of VOCs can be carried out by gas chromatography–mass spectrometry (GC-MS) after active or passive sampling and (high temperature) thermal desorption. An attractive alternative would be to combine GC-MS with headspace (HS) systems as it allows simpler, faster, low temperature desorption. We present here the first report of HS-GC-MS for the determination of VOCs in air sampled using solid supports. Abstract. The use of a head

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Mansurova, R. M., A. K. Umbetkaliev, N. K. Zhylybaeva, N. Erezhep, K. Dosumov, and Z. A. Mansurov. "Ni-Carbon Mineral Sorbent - Catalyst of Sulfur Dioxide Sorption." Eurasian Chemico-Technological Journal 3, no. 2 (2017): 119. http://dx.doi.org/10.18321/ectj554.

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The morphology and structure of Ni-carbon mineral sorbent-catalysts on the basis of local mineral raw material were studied by methods of thermoprogrammed desorption and electron microscopy. The specific<br />surface, filamentary carbon diameter sizes and sorption characteristics of sulfur dioxide adsorption were determined. It was shown that the adsorption capacity of carboncontaining sorbents is influenced by: nature of metals of varying valence, specific surface and density of patterns. Physical and chemical sorption of sulfur dioxide was shown experimentally.

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Ledesma-Durán, Aldo, S. I. Hernández, and Iván Santamaría-Holek. "Effect of Surface Diffusion on Adsorption–Desorption and Catalytic Kinetics in Irregular Pores. I. Local Kinetics." Journal of Physical Chemistry C 121, no. 27 (2017): 14544–56. http://dx.doi.org/10.1021/acs.jpcc.7b03652.

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Bartha, J. W., U. Barjenbruch, and M. Henzler. "Thermal desorption spectroscopy of Xe at the Si(111) as a local probe for surface structures." Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 3, no. 3 (1985): 1588–91. http://dx.doi.org/10.1116/1.573137.

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Liu, Haichuan, Kamilia Abahri, Remi Legroux, and Rachid Bennacer. "Evaluation of local hemp concrete deformation under hygric adsorption/desorption assisted by 2D digital image correlation." Construction and Building Materials 490 (September 2025): 142578. https://doi.org/10.1016/j.conbuildmat.2025.142578.

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Kwoka, Monika, Elisabetta Comini, Dario Zappa, and Jacek Szuber. "Flower-like ZnO Nanostructures Local Surface Morphology and Chemistry." Nanomaterials 12, no. 15 (2022): 2666. http://dx.doi.org/10.3390/nano12152666.

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This work presents the results of comparative studies using complementary methods, such as scanning electron microscopy (SEM), X-ray photoemission spectroscopy (XPS), and thermal desorption spectroscopy (TDS) to investigate the local surface morphology and chemistry of flower-like ZnO nanostructures synthesized by the thermal oxidation technique on native Si/SiO2 substrates. SEM studies showed that our flower-like ZnO nanostructures contained mostly isolated and irregular morphological low-dimensional forms, seen as rolled-up floss flowers, together with local, elongated, complex stalks simila

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Meng, Yajie, Ziyue Huang, Xi Chen, et al. "Curvature-Influenced Electrocatalytic NRR Reactivity by Heme-like FeN4-Site on Carbon Materials." Molecules 30, no. 8 (2025): 1670. https://doi.org/10.3390/molecules30081670.

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Two-dimensional carbon materials and their derivatives are widely applied as promising electrocatalysts and supports of single-atom sites. Theoretical investigations of 2D carbon materials are usually based on planar models, yet ignore local curvature brought on by possible surface distortion, which can be significant to the exact catalytic performance as has been realized in latest research. In this work, the curvature-influenced electrocatalytic nitrogen reduction reaction (NRR) reactivity of heme-like FeN4 single-atom site was predicted by a first-principle study, with FeN4-CNT(m,m) (m = 5~

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Grau Turuelo, Constantino, Rebecca Grün, and Cornelia Breitkopf. "Simulation of the Frequency Response Analysis of Gas Diffusion in Zeolites by Means of Computational Fluid Dynamics." Minerals 13, no. 10 (2023): 1238. http://dx.doi.org/10.3390/min13101238.

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Frequency response (FR) analysis allows the characterization of gas diffusion occurring within a porous solid system. The shape of the pressure response curves obtained after a volume modulation in the reactor gives essential information about the gas adsorption and desorption properties of the porous material, e.g., zeolites, which is in contact with a certain gas environment, as well as information about the transport phenomena such as diffusion. In this work, a simulation model developed in COMSOL Multiphysics® is introduced to reproduce the experimental behavior of the tested solid/gas sys

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Ikegawa, Jin, Shiyu Wang, Ken Saito, Shinichi Kato, Kazuhiko Yamazaki та Shinsuke Suzuki. "Effect of Spherical θ Precipitation in 1.5 GPa Grade Tempered Martensitic Steel on the Occurrence of Delayed Fracture". Metals 14, № 9 (2024): 999. http://dx.doi.org/10.3390/met14090999.

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The objective of this study is to clarify the effect of spherical cementite (θ) precipitation on the occurrence of delayed fracture in 1.5 GPa grade tempered martensitic steels. Constant load tests were performed with a cathodically charged specimen. A 1GPa-load was applied to the specimen, and cathodic charging was performed in 3% NaCl + 3 g/L NH4SCN solution. The specimen of steel without spherical θ did not fracture at the current density of 5 A·m−2 or even by increasing to 50 A·m−2. On the other hand, the specimen of steel with spherical θ fractured after 0.2 h at 5 A·m−2. The strain aroun

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