Electrode Materials a Key Factor to Improve Soil Electroremediation

Influence of the Condition of the Exposed Electrode Edge in the SDBD on the Discharge Operation Mode in Argon

Journal of Physics Conference Series ◽

10.1088/1742-6596/2100/1/012014 ◽

2021 ◽

Vol 2100 (1) ◽

pp. 012014

Author(s):

I Selivonin ◽

I Moralev

Keyword(s):

Electrode Materials ◽

Phenomenological Study ◽

Operation Mode ◽

Surface Barrier ◽

Operating Modes ◽

Copper Electrodes ◽

Key Factor ◽

Discharge Operation ◽

Electrode Edge ◽

Aluminum Electrodes

Abstract The paper is devoted to the phenomenological study of the operating modes of a surface barrier discharge in argon in the case of treated by the discharge and new aluminum and copper electrodes. It is shown that without preliminary treating of the edges of the electrodes in the case of copper and aluminum electrodes, the discharge has a different spatial structure determined by the self-organization of the DBD. After erosion cleaning of the electrode edges, the identical operating modes are established. Such effects confirm the former assumption that the key factor determining the mode of the discharge operation for various electrode materials is the surface charge built on the oxides deposited on the edge. The different dynamics of oxides in the case of copper and aluminum electrodes is determined by the resistance of the oxides of these metals to sputtering, which is indirectly confirmed by the estimation of the binding energy for these materials.

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Dispersant Molecules with Functional Catechol Groups for Supercapacitor Fabrication

Molecules ◽

10.3390/molecules26061709 ◽

2021 ◽

Vol 26 (6) ◽

pp. 1709

Author(s):

Kaelan Rorabeck ◽

Igor Zhitomirsky

Keyword(s):

Electrode Materials ◽

Charge Storage ◽

Adsorption Mechanisms ◽

Beneficial Effects ◽

Chemical Structures ◽

Capacitive Properties ◽

Structural Peculiarities ◽

Conductive Additives ◽

Key Factor ◽

A Charge

Cathodes for supercapacitors with enhanced capacitive performance are prepared using MnO2 as a charge storage material and carbon nanotubes (CNT) as conductive additives. The enhanced capacitive properties are linked to the beneficial effects of catecholate molecules, such as chlorogenic acid and 3,4,5-trihydroxybenzamide, which are used as co-dispersants for MnO2 and CNT. The dispersant interactions with MnO2 and CNT are discussed in relation to the chemical structures of the dispersant molecules and their biomimetic adsorption mechanisms. The dispersant adsorption is a key factor for efficient co-dispersion in ethanol, which facilitated enhanced mixing of the nanostructured components and allowed for improved utilization of charge storage properties of the electrode materials with high active mass of 40 mg cm−2. Structural peculiarities of the dispersant molecules are discussed, which facilitate dispersion and charging. Capacitive properties are analyzed using cyclic voltammetry, chronopotentiometry and impedance spectroscopy. A capacitance of 6.5 F cm−2 is achieved at a low electrical resistance. The advanced capacitive properties of the electrodes are linked to the microstructures of the electrodes prepared in the presence of the dispersants.

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Understanding sodium versus lithium intercalation potentials of electrode materials for alkali-ion batteries

Functional Materials Letters ◽

10.1142/s1793604714400037 ◽

2014 ◽

Vol 07 (06) ◽

pp. 1440003 ◽

Cited By ~ 1

Author(s):

M. Elena Arroyo-De Dompablo

Keyword(s):

Density Functional ◽

Electrode Materials ◽

Structural Parameter ◽

Functional Theory ◽

Tetrahedral Sites ◽

The Density Functional Theory ◽

Key Factor ◽

Na Ions ◽

Ion Intercalation ◽

Alkali Ion

Differences in average voltages for the alkali ion intercalation ( Li , Na ) in a variety of electrode materials are investigated. The average Li and Na insertion potentials in the cavities of ◻ ReO 3-perovskite, ramsdellite-◻ Ti 2 O 4, layered-◻2 A 2 Ti 3 O 7 ( A = Li , Na ) and NASICON-◻ Na 3 Ti 2( PO 4)3 have been calculated by first principles calculations at the density functional theory level. The results identify the type of site occupied by the inserted ion as the relevant structural parameter. Occupation of large sites (c.n. = 12, 8) might yield Na insertion voltages higher than Li ones. On the other extreme, occupation of tetrahedral sites raises the Li insertion voltage as much as 0.8 V above the Na one. For octahedral sites the higher polarizing character of Li ions vs. Na ions acts as a key-factor to bring the Li intercalation voltage above that of Na intercalation.

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Attachment of oral bacteria to titanium surfaces: An SEM study

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100170074 ◽

1994 ◽

Vol 52 ◽

pp. 468-469

Author(s):

J. E. Laffoon ◽

R. L. Anderson ◽

J. C. Keller ◽

C. D. Wu-Yuan

Keyword(s):

Technical Problem ◽

Titanium Implant ◽

Oral Bacteria ◽

Bacterial Cells ◽

Thin Sections ◽

Surface Ultrastructure ◽

Sem Study ◽

Key Factor ◽

Titanium Surfaces

Titanium (Ti) dental implants have been used widely for many years. Long term implant failures are related, in part, to the development of peri-implantitis frequently associated with bacteria. Bacterial adherence and colonization have been considered a key factor in the pathogenesis of many biomaterial based infections. Without the initial attachment of oral bacteria to Ti-implant surfaces, subsequent polymicrobial accumulation and colonization leading to peri-implant disease cannot occur. The overall goal of this study is to examine the implant-oral bacterial interfaces and gain a greater understanding of their attachment characteristics and mechanisms. Since the detailed cell surface ultrastructure involved in attachment is only discernible at the electron microscopy level, the study is complicated by the technical problem of obtaining titanium implant and attached bacterial cells in the same ultra-thin sections. In this study, a technique was developed to facilitate the study of Ti implant-bacteria interface.Discs of polymerized Spurr’s resin (12 mm x 5 mm) were formed to a thickness of approximately 3 mm using an EM block holder (Fig. 1). Titanium was then deposited by vacuum deposition to a film thickness of 300Å (Fig. 2).

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A novel ligand with –NH2 and –COOH-decorated Co/Fe-based oxide for an efficient overall water splitting: dual modulation roles of active sites and local electronic structure

Catalysis Science & Technology ◽

10.1039/d0cy01109f ◽

2020 ◽

Vol 10 (18) ◽

pp. 6266-6273

Author(s):

Yalan Zhang ◽

Zebin Yu ◽

Ronghua Jiang ◽

Jung Huang ◽

Yanping Hou ◽

...

Keyword(s):

Electronic Structure ◽

Water Splitting ◽

Energy Demand ◽

Active Sites ◽

Electrode Materials ◽

Global Energy ◽

Overall Water Splitting ◽

Local Electronic Structure ◽

Electrochemical Water Splitting

Excellent electrochemical water splitting with remarkable durability can provide a solution to satisfy the increasing global energy demand in which the electrode materials play an important role.

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Forum: Morphological Awareness as a Key Factor in Language-Literacy Success for Academic Achievement

Language Speech and Hearing Services in Schools ◽

10.1044/2020_lshss-20-00064 ◽

2020 ◽

Vol 51 (3) ◽

pp. 509-513

Author(s):

Ashley Bourque Meaux ◽

Julie A. Wolter ◽

Ginger G. Collins

Keyword(s):

Academic Achievement ◽

Academic Success ◽

Literacy Development ◽

Morphological Awareness ◽

Language And Literacy ◽

Speech Language Pathologists ◽

School Based ◽

Literacy Success ◽

Key Factor ◽

Language And Literacy Development

Purpose This article introduces the Language, Speech, and Hearing Services in Schools Forum: Morphological Awareness as a Key Factor in Language-Literacy Success for Academic Achievement. The goal of this forum is to relate the influence morphological awareness (MA) has on overall language and literacy development with morphology acting as the “binding agent” between orthography, phonology, and semantics ( Perfetti, 2007 ) in assessment and intervention for school-aged children. Method This introduction provides a foundation for MA development and explores the influence MA has over the course of school-aged language and literacy development. Through summaries of the 11 articles in this forum, school-based speech-language pathologists will be able to convey the importance of MA to promote successful educational outcomes for kindergarten to adolescent students. The forum explores researcher-developed assessments used to help identify MA skill level in first- through eighth-grade students at risk for literacy failure to support instructional needs. The forum also provides school-based speech-language pathologists with details to design and implement MA interventions to support academic success for school-aged students with varying speech-language needs (e.g., dual language emersion, vocabulary development, reading comprehension) using various service delivery models (e.g., small group, classroom-based, intensive summer camps). Conclusion MA is effective in facilitating language and literacy development and as such can be an ideally focused on using multilinguistic approaches for assessment and intervention. The articles in this issue highlight the importance in assessment measures and intervention approaches that focus on students' MA to improve overall academic success in children of all ages and abilities.

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