Results 51 to 60 of about 235,631 (302)

The Effect of Adsorbent-Material Properties on PSA Based Oxygen Concentrators

Journal of Physics: Conference Series, 2023
Abstract An oxygen concentrator is a technology for producing pure oxygen. By using the Pressure Swing Adsorption method, zeolite as an oxygen concentrator will absorb nitrogen in the free air and release oxygen as an output from the oxygen concentrator.
S N Hida, A N Putra, M Y Nurjaya, M B R Sunaryo, A Suhendi   +4 more
openaire   +1 more source

Trace Nickel Activated Biphasic Core‐CuOii/Shell‐CuOi Secondary Microspheres Enable Room Temperature Parts‐Per‐Trillion‐Level NO2 Detection

Advanced Engineering Materials, EarlyView.
An idea of designing novel sensors is proposed by creating appropriate Schottky barriers and vacancies between isomorphous Core‐CuOii/ Shell‐CuOi secondary microspheres and enhancing catalytic and spill‐over effects, and electronegativity via spontaneous biphasic separation, self‐assembly, and trace‐Ni‐doping.
Bala Ismail Adamu, Peipei Chen, Shafia Mukhtar Ibrahim, Mukhtar Lawan Adam, Attia Falak, Mokhotjwa Simon Dhlamini, Hanfu Wang, Lingxiang Jiang, Weiguo Chu   +8 more
wiley   +1 more source

IN SITU DRIFTS/MS STUDIES ON THE INTERACTION OF METHANOL AND ETHYL ACETATE OVER MG-LA CATALYST [PDF]

Química Nova, 2020
The surface intermediates formed on the Mg-La catalyst (molar ratio 1:1) were studied through temperature-programmed desorption (TPD) and diffuse reflectance infrared Fourier transform spectroscopy coupled to mass spectrometry (DRIFTS-MS) using methanol (
Adão S. Gonçalves, Cristiane A. Henriques, Deborah V. Cesar   +2 more
doaj   +1 more source

First principles study of adsorbed Cu_n (n=1-4) microclusters on MgO(100): structural and electronic properties

, 1998
We present a density functional study of the structural and electronic properties of small Cu_n (n=1,4) aggregates on defect-free MgO(100). The calculations employ a slab geometry with periodic boundary conditions, supercells with up to 76 atoms, and ...
A. Selloni, R. Car, Tosi M. P., V. Musolino   +3 more
core   +1 more source

In Situ Constructed Magnetic Core‐Shell Hydrogen‐Bonded Organic Framework‐on‐Metal–Organic Framework Structure: an Efficient Catalyst for Peroxymonosulfate Activation

Advanced Functional Materials, EarlyView.
In this work, a magnetic core‐shell catalyst (HOF‐on‐Fe3O4/ZIF‐67) is successfully synthesized, consisting of a metal–organic framework (ZIF‐67) with magnetic Fe3O4 as the core and a porous hydrogen‐bonded organic framework (HOF) as the shell. The catalyst efficiently activated peroxymonosulfate, resulting in rapid and effective removal of water ...
Yingying Du, Chenhui Ding, Chao Deng, Susanta Banerjee, Seema Agarwal   +4 more
wiley   +1 more source

Possible Structure of Surface Active Complexes in Molten CaO-SiO2-CaF2 Slags

Наука и техника, 2005
A section area of silicon and oxygen complexes adsorbed at the boundary of “slag-gas” separation has been calculated in accordance with the concentration dependence of surface tension in molten slags.
V. F Sobolev, A. A. Chichko
doaj   +1 more source

O adsorption and incipient oxidation of the Mg(0001) surface [PDF]

, 2003
First principles density functional calculations are used to study the early oxidation stages of the Mg(0001) surface for oxygen coverages 1/16
A. Kiejna, A.R. Wazzan, A.U. Goonewardene, Adam Kiejna, B.C. Mitrovic, B.E. Hayden, C. Bungaro, C. Noguera, D. Hardie, D. Vanderbilt, E. Schröder, E. Wachowicz, E. Ziambaras, Elsebeth Schröder, H. Cronacher, H. Namba, H.B. Michaelson, H.L. Davis, J. Ghijsen, J. Neugebauer, J.P. Perdew, J.P. Perdew, L. Bengtsson, P.A. Thiry, R. Fasel, Roman Fasel, S. Lacombe, S.A. Flodström, S.M. Driver, V.A. Esaulov, Y. Yourdshahyan   +30 more
core   +1 more source

Photoswitchable Conductive Metal–Organic Frameworks

Advanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu, Mersad Mostaghimi, Abhinav Chandresh, Saibal Jana, Wolfgang Wenzel, Lars Heinke   +5 more
wiley   +1 more source

Substrate strain tunes operando geometric distortion and oxygen reduction activity of CuN2C2 single-atom sites

Nature Communications, 2021
The rational design of single-atom catalysts is challenging. This work reveals a substrate-strain tuned geometry distortion of CuN2C2 single-atom site, which greatly boosts oxygen reduction activity by facilitating electron transfer to adsorbed O.
Guokang Han, Xue Zhang, Wei Liu, Qinghua Zhang, Zhiqiang Wang, Jun Cheng, Tao Yao, Lin Gu, Chunyu Du, Yunzhi Gao, Geping Yin   +10 more
doaj   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source