Photocatalytic processes with tungsten oxygen anion clusters

10.2741/1156 ◽  
2003 ◽  
Vol 8 (6) ◽  
pp. s813-825 ◽  
Author(s):  
Elias Papaconstantinou
Keyword(s):  
Oxygen Anion ◽  
Anion Clusters ◽  
Photocatalytic Processes

Structures of Hydrated Oxygen Anion Clusters:  DFT Calculations for O-(H2O)n, O2-(H2O)n, and O3-(H2O)n(n= 0−4)

2003 ◽  
Vol 107 (7) ◽  
pp. 962-967 ◽  
Author(s):  
Takamasa Seta ◽  
Mitsuo Yamamoto ◽  
Masateru Nishioka ◽  
Masayoshi Sadakata
Keyword(s):  
Dft Calculations ◽  
Oxygen Anion ◽  
Anion Clusters

ChemInform Abstract: Homogenous Catalysis by Transition-Metal Oxygen Anion Clusters

ChemInform ◽  
2010 ◽  
Vol 27 (7) ◽  
pp. no-no
Author(s):  
C. L. HILL ◽  
C. M. PROSSER-MCCARTHA
Keyword(s):  
Transition Metal ◽  
Oxygen Anion ◽  
Homogenous Catalysis ◽  
Anion Clusters

Homogeneous catalysis by transition metal oxygen anion clusters

1995 ◽  
Vol 143 ◽  
pp. 407-455 ◽  
Author(s):  
Craig L. Hill ◽  
Christina M. Prosser-McCartha
Keyword(s):  
Transition Metal ◽  
Homogeneous Catalysis ◽  
Oxygen Anion ◽  
Anion Clusters

Structures and Energetics of Hydrated Oxygen Anion Clusters

2005 ◽  
Vol 109 (33) ◽  
pp. 7418-7428 ◽  
Author(s):  
Daniel M. Chipman ◽  
John Bentley
Keyword(s):  
Oxygen Anion ◽  
Anion Clusters

Structure of Hydrated Oxygen Anion Clusters: DFT Calculations for O-(H2O)n, O2-(H2O)n, and O3-(H2O)n (n = 0—4).

ChemInform ◽  
2003 ◽  
Vol 34 (21) ◽  
Author(s):  
Takamasa Seta ◽  
Mitsuo Yamamoto ◽  
Masateru Nishioka ◽  
Masayoshi Sadakata
Keyword(s):  
Dft Calculations ◽  
Oxygen Anion ◽  
Anion Clusters

Effect of High Salt Concentration on Ion Clustering and Transport in Polymer Solid Electrolytes: a Molecular Dynamics Study of PEO-LiTFSI

2018 ◽  
Author(s):  
Nicola Molinari ◽  
Jonathan P. Mailoa ◽  
Boris Kozinsky
Keyword(s):  
Polymer Electrolyte ◽  
Salt Concentration ◽  
Rational Design ◽  
Material System ◽  
Ion Dynamics ◽  
High Concentration ◽  
Anion Clusters ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

<div> <div> <div> <p>The model and analysis methods developed in this work are generally applicable to any polymer electrolyte/cation-anion combination, but we focus on the currently most prominent polymer electrolyte material system: poly(ethylene) oxide/Li- bis(trifluoromethane) sulfonamide (PEO + LiTFSI). The obtained results are surprising and challenge the conventional understanding of ionic transport in polymer electrolytes: the investigation of a technologically relevant salt concentration range (1 - 4 M) revealed the central role of the anion in coordinating and hindering Li ion movement. Our results provide insights into correlated ion dynamics, at the same time enabling rational design of better PEO-based electrolytes. In particular, we report the following novel observations. 1. Strong binding of the Li cation with the polymer competes with significant correlation of the cation with the salt anion. 2. The appearance of cation-anion clusters, especially at high concentration. 3. The asymmetry in the composition (and therefore charge) of such clusters; specifically, we find the tendency for clusters to have a higher number of anions than cations.</p> </div> </div> </div>

Effect of High Salt Concentration on Ion Clustering and Transport in Polymer Solid Electrolytes: a Molecular Dynamics Study of PEO-LiTFSI

2018 ◽  
Author(s):  
Nicola Molinari ◽  
Jonathan P. Mailoa ◽  
Boris Kozinsky
Keyword(s):  
Polymer Electrolyte ◽  
Salt Concentration ◽  
Rational Design ◽  
Material System ◽  
Ion Dynamics ◽  
High Concentration ◽  
Anion Clusters ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

<div> <div> <div> <p>The model and analysis methods developed in this work are generally applicable to any polymer electrolyte/cation-anion combination, but we focus on the currently most prominent polymer electrolyte material system: poly(ethylene) oxide/Li- bis(trifluoromethane) sulfonamide (PEO + LiTFSI). The obtained results are surprising and challenge the conventional understanding of ionic transport in polymer electrolytes: the investigation of a technologically relevant salt concentration range (1 - 4 M) revealed the central role of the anion in coordinating and hindering Li ion movement. Our results provide insights into correlated ion dynamics, at the same time enabling rational design of better PEO-based electrolytes. In particular, we report the following novel observations. 1. Strong binding of the Li cation with the polymer competes with significant correlation of the cation with the salt anion. 2. The appearance of cation-anion clusters, especially at high concentration. 3. The asymmetry in the composition (and therefore charge) of such clusters; specifically, we find the tendency for clusters to have a higher number of anions than cations.</p> </div> </div> </div>

Enhanced methylene blue removal efficiency of SnO2 thin film using sono-photocatalytic processes

2021 ◽  
Vol 117 ◽  
pp. 111116
Author(s):  
Mohamed Amine Bezzerrouk ◽  
Mohamed Bousmaha ◽  
Madani Hassan ◽  
Ahmed Akriche ◽  
Bachir Kharroubi ◽  
...  
Keyword(s):  
Thin Film ◽  
Methylene Blue ◽  
Removal Efficiency ◽  
Sno2 Thin Film ◽  
Methylene Blue Removal ◽  
Photocatalytic Processes

scholarly journals Shedding light on the nature of the catalytically active species in photocatalytic reactions using Bi2O3 semiconductor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Paola Riente ◽  
Mauro Fianchini ◽  
Patricia Llanes ◽  
Miquel A. Pericàs ◽  
Timothy Noël
Keyword(s):  
Experimental Studies ◽  
Heterogeneous Photocatalysis ◽  
Active Species ◽  
Organic Transformations ◽  
Alkyl Bromides ◽  
Catalytically Active ◽  
Visible Light Driven ◽  
Photocatalytic Reactions ◽  
Insight Into ◽  
Photocatalytic Processes

AbstractThe importance of discovering the true catalytically active species involved in photocatalytic systems allows for a better and more general understanding of photocatalytic processes, which eventually may help to improve their efficiency. Bi2O3 has been used as a heterogeneous photocatalyst and is able to catalyze several synthetically important visible-light-driven organic transformations. However, insight into the operative catalyst involved in the photocatalytic process is hitherto missing. Herein, we show through a combination of theoretical and experimental studies that the perceived heterogeneous photocatalysis with Bi2O3 in the presence of alkyl bromides involves a homogeneous BinBrm species, which is the true photocatalyst operative in the reaction. Hence, Bi2O3 can be regarded as a precatalyst which is slowly converted in an active homogeneous photocatalyst. This work can also be of importance to mechanistic studies involving other semiconductor-based photocatalytic processes.

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