Synthesis of ordered microporous/macroporous MOF-808 through modulator-induced defect-formation, and surfactant self-assembly strategies

2020 ◽  
Vol 22 (22) ◽  
pp. 12591-12604
Author(s):  
Carolina Ardila-Suárez ◽  
Daniel R. Molina V. ◽  
Halima Alem ◽  
Víctor G. Baldovino-Medrano ◽  
Gustavo E. Ramírez-Caballero
Keyword(s):  
Self Assembly ◽  
Defect Formation ◽  
Surface Composition ◽  
Chemical Surface ◽  
Similar Chemical

Ordered micro/macroporous MOF-808 materials with tunable porosity and similar chemical surface composition were synthesized through the modulator-induced defect-formation and surfactant self-assembly strategies.

scholarly journals Crystallization of TiO2-MoS2 Hybrid Material under Hydrothermal Treatment and Its Electrochemical Performance

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2706
Author(s):  
Katarzyna Siwińska-Ciesielczyk ◽  
Beata Kurc ◽  
Dominika Rymarowicz ◽  
Adam Kubiak ◽  
Adam Piasecki ◽  
...  
Keyword(s):  
Hydrothermal Treatment ◽  
Surface Composition ◽  
Specific Capacity ◽  
Diffraction Method ◽  
Lithium Ion ◽  
Surface Concentration ◽  
Molar Ratio ◽  
Storage Device ◽  
X Ray ◽  
Chemical Surface

Hydrothermal crystallization was used to synthesize an advanced hybrid system containing titania and molybdenum disulfide (with a TiO2:MoS2 molar ratio of 1:1). The way in which the conditions of hydrothermal treatment (180 and 200 °C) and thermal treatment (500 °C) affect the physicochemical properties of the products was determined. A physicochemical analysis of the fabricated materials included the determination of the microstructure and morphology (scanning and transmission electron microscopy—SEM and TEM), crystalline structure (X-ray diffraction method—XRD), chemical surface composition (energy dispersive X-ray spectroscopy—EDS) and parameters of the porous structure (low-temperature N2 sorption), as well as the chemical surface concentration (X-ray photoelectron spectroscop—XPS). It is well known that lithium-ion batteries (LIBs) represent a renewable energy source and a type of energy storage device. The increased demand for energy means that new materials with higher energy and power densities continue to be the subject of investigation. The objective of this research was to obtain a new electrode (anode) component characterized by high work efficiency and good electrochemical properties. The synthesized TiO2-MoS2 material exhibited much better electrochemical stability than pure MoS2 (commercial), but with a specific capacity ca. 630 mAh/g at a current density of 100 mA/g.

The influence of the chemical surface composition on the drying process of milk droplets

2016 ◽  
Vol 27 (6) ◽  
pp. 2324-2334 ◽  
Author(s):  
Martin Foerster ◽  
Thomas Gengenbach ◽  
Meng Wai Woo ◽  
Cordelia Selomulya
Keyword(s):  
Surface Composition ◽  
Drying Process ◽  
Chemical Surface

Influence of morphology and chemical surface composition on electrical conductivity of SiC microspheres

2022 ◽  
Vol 715 ◽  
pp. 121942
Author(s):  
Ilona Pleșa ◽  
Simone Radl ◽  
Uwe Schichler ◽  
Franz Ramsauer ◽  
Werner Ladstätter ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Surface Composition ◽  
Chemical Surface

The effect of fluorine-based plasma treatment on morphology and chemical surface composition of biocompatible silicone elastomer

2006 ◽  
Vol 253 (3) ◽  
pp. 1506-1511 ◽  
Author(s):  
Dariusz Szmigiel ◽  
Krzysztof Domański ◽  
Piotr Prokaryn ◽  
Piotr Grabiec ◽  
Janusz W. Sobczak
Keyword(s):  
Plasma Treatment ◽  
Surface Composition ◽  
Silicone Elastomer ◽  
Chemical Surface

Electroless Plating of Copper Interconnections on Ion Beam Catalyzed Polyimide

1989 ◽  
Vol 167 ◽  
Author(s):  
T. Flottmann ◽  
A. Tulke ◽  
E. Esper ◽  
W. Lohmann
Keyword(s):  
Electroless Plating ◽  
Surface Composition ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Plating Bath ◽  
Chemical Surface ◽  
Polyimide Substrate ◽  
Palladium Acetylacetonate ◽  
Catalytic Sites

AbstractDecomposition of a palladium compound by ion irradiation has been used to catalyze electroless plating on polyimide. First, palladium-acetylacetonate or -acetate is spin-coated on a polyimide substrate. The thin resist film is then irradiated through a mask with He or Ar ions of 100 keV energy. After washing off the film parts which were not exposed to the ion beam, copper is deposited on the catalyzed polyimide substrate in an alkaline electroless plating bath. When using alkaline resistant polyimide, copper lines several microns thick can be plated. The chemical surface composition of the Pd-compounds after ion beam exposure has been investigated with ESCA. It has been found that the Pd is partially reduced. Pd-acetate is more effective to form catalytic sites than Pd-acetylacetonate.

scholarly journals High-Yield Lignocellulosic Fibers from Date Palm Biomass as Reinforcement in Polypropylene Composites: Effect of Fiber Treatment on Composite Properties

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1423
Author(s):  
Chihaoui Belgacem ◽  
Quim Tarres ◽  
Francesc Xavier Espinach ◽  
Pere Mutjé ◽  
Sami Boufi ◽  
...  
Keyword(s):  
Date Palm ◽  
Surface Composition ◽  
Alkali Treatment ◽  
Enzymatic Treatment ◽  
High Yield ◽  
Intrinsic Resistance ◽  
Chemical Surface ◽  
Polypropylene Composites ◽  
Maleated Polypropylene ◽  
Date Palm Fibers

In this work, date palm waste (DPW) stemming from the annual pruning of date palm was used as reinforcing filler in polypropylene (PP) matrix at 40% w/w. Three pre-treatment routes were performed for the DPW, namely (i) defibration, (ii) soft alkali treatment, and (iii) enzymatic treatment, to obtain date palm fibers (DPF) and to investigate the effect of each process on their chemical composition, which will ultimately affect the mechanical properties of the resulting composites. The enzymatic and alkali treatment, combined with maleated polypropylene (MAPP) as a coupling agent, resulted in a composite with higher strength and stiffness than the neat PP. The differences in the reinforcing effect were explained by the change in the morphology of DPF and their chemical surface composition according to the selected treatment of DPW. Enzymatic treatment maximized the tensile strength of the compound as a consequence of an improvement in the interfacial shear strength and the intrinsic resistance of the fibers.

scholarly journals Microfluidic Preconcentration Chip with Self-Assembled Chemical Modified Surface for Trace Carbonyl Compounds Detection

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4402 ◽  
Author(s):  
Jie Cheng ◽  
Jianwei Shao ◽  
Yifei Ye ◽  
Yang Zhao ◽  
Chengjun Huang ◽  
...  
Keyword(s):  
Water Quality ◽  
Self Assembly ◽  
Carbonyl Compounds ◽  
Microelectromechanical Systems ◽  
Fem Analysis ◽  
Microfluidic Channels ◽  
Chemical Surface ◽  
Chemical Surface Modification ◽  
Pillar Arrays ◽  
Low Sensitivity

Carbonyl compounds in water sources are typical characteristic pollutants, which are important indicators in the health risk assessment of water quality. Commonly used analytical chemistry methods face issues such as complex operations, low sensitivity, and long analysis times. Here, we report a silicon microfluidic device based on click chemical surface modification that was engineered to achieve rapid, convenient and efficient capture of trace level carbonyl compounds in liquid solvent. The micro pillar arrays of the chip and microfluidic channels were designed under the basis of finite element (FEM) analysis and fabricated by the microelectromechanical systems (MEMS) technique. The surface of the micropillars was sputtered with precious metal silver and functionalized with the organic substance amino-oxy dodecane thiol (ADT) by self-assembly for capturing trace carbonyl compounds. The detection of ppb level fluorescent carbonyl compounds demonstrates that the strategy proposed in this work shows great potential for rapid water quality testing and for other samples with trace carbonyl compounds.

Novel Morphology of Voids in Single-Quasicrystalline Icosahedral Al70.5Pd21.0Mn8.5

1998 ◽  
Vol 53 (8) ◽  
pp. 679-683 ◽  
Author(s):  
Y. Waseda ◽  
S. Suzuki ◽  
K. Urbanb
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Electron Spectroscopy ◽  
Auger Electron ◽  
Surface Composition ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
Chemical Surface ◽  
Habit Planes ◽  
Scanning Electron

Abstract This paper deals with the morphology and surface chemistry of faceted voids existing in singlequasicrystalline icosahedral Al70.5Pd21.0Mn8.5. By observation with a scanning electron microscope of surfaces obtained by cleavage of the quasicrystal, the habit planes of the dodecahedral voids were identified. The chemical surface composition of the void surface was determined by Auger electron spectroscopy after cleavage in ultra-high vacuum.

Synthesis of Ordered Microporous/Macroporous MOF-808 through Modulator-Induced Defect Formation, and Surfactant Self-Assembly Strategies

2019 ◽  
Author(s):  
Carolina Ardila-Suárez ◽  
Daniel R. Molina V. ◽  
Halima Alem ◽  
Víctor Gabriel Baldovino Medrano ◽  
Gustavo E Ramírez-Caballero
Keyword(s):  
Self Assembly ◽  
Active Sites ◽  
Defect Formation ◽  
The Self ◽  
Size Distributions ◽  
Pore Size Distributions ◽  
Interconnected Pores ◽  
Surfactant Assisted ◽  
Enhanced Crystallinity

<p>Ordered materials with interconnected porosity allow the diffusion of molecules within their inner porous structure to access the active sites located in the microporous core. As a follow-up of our work on engineering of MOF-808, in this contribution, we study the synthesis of defective MOF-808 using two different strategies: the use of modulators and the surfactant-assisted synthesis to obtain materials with ordered and interconnected pores. The results of the study indicated that (i) modulators agents led to formation of microporous/mesoporous MOFs through the formation of missing linker defects and (ii) the self-assembly of CTAB surfactant produced ordered microporous/macroporous network which enhanced crystallinity. However, the surface properties of the materials seem to be unaffected by the use of surfactants during synthesis. These results contribute to the development of ordered materials with a broad range of pore size distributions and give rise to new opportunities to extend the applications of MOF-808. </p>

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