Crystalline nanoscale assembly of gold clusters for reversible storage and sensing of CO2via modulation of photoluminescence intermittency

2018 ◽  
Vol 6 (30) ◽  
pp. 8205-8211 ◽  
Author(s):  
Srestha Basu ◽  
Satyapriya Bhandari ◽  
Uday Narayan Pan ◽  
Anumita Paul ◽  
Arun Chattopadhyay
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Gold Nanoclusters ◽  
Gold Clusters ◽  
Gaseous Carbon Dioxide ◽  
Photoluminescence Intermittency ◽  
Nanoscale Assembly

We report that zinc mediated crystalline nanoscale assemblies of atomic gold nanoclusters (NCs) were able to reversibly store gaseous carbon dioxide with adsorption capacity of 1.79 mM g−1 at 20 °C and 20 bar.

Influence of intramolecular interactions on carbon dioxide gas adsorption capacity in Mesoporous Imine polymers

2018 ◽  
Author(s):  
Jaya Prakash Madda ◽  
Pilli Govindaiah ◽  
Sushant Kumar Jena ◽  
Sabbhavat Krishna ◽  
Rupak Kishor
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Density Functional ◽  
Gas Adsorption ◽  
Ambient Pressure ◽  
Condensation Reaction ◽  
Intramolecular Interactions ◽  
Carbon Dioxide Adsorption ◽  
Nitrogen Gas ◽  
Adsorption Characteristic

<p>Covalent organic Imine polymers with intrinsic meso-porosity were synthesized by condensation reaction between 4,4-diamino diphenyl methane and (para/meta/ortho)-phthaladehyde. Even though these polymers were synthesized from precursors of bis-bis covalent link mode, the bulk materials were micrometer size particles with intrinsic mesoporous enables nitrogen as well as carbon dioxide adsorption in the void spaces. These polymers were showed stability up to 260<sup>o</sup> centigrade. Nitrogen gas adsorption capacity up to 250 cc/g in the ambient pressure was observed with type III adsorption characteristic nature. Carbon dioxide adsorption experiments reveal the possible terminal amine functional group to carbamate with CO<sub>2</sub> gas molecule to the polymers. One of the imine polymers, COP-3 showed more carbon dioxide sorption capacity and isosteric heat of adsorption (Q<sub>st</sub>) than COP-1 and COP-2 at 273 K even though COP-3 had lower porosity for nitrogen gas than COP-1 and COP-2. We explained the trends in gas adsorption capacities and Qst values as a consequence of the intra molecular interactions confirmed by Density Functional Theory computational experiments on small molecular fragments.</p>

The ν1 Band of Carbon Dioxide in Pressure-Induced Absorption. II. Density and Temperature Dependence of the Intensity; Critical Phenomena

1972 ◽  
Vol 50 (12) ◽  
pp. 1355-1362 ◽  
Author(s):  
L. Mannik ◽  
J. C. Stryland
Keyword(s):  
Carbon Dioxide ◽  
Absorption Coefficient ◽  
Density Range ◽  
Induced Absorption ◽  
Lennard Jones ◽  
Molecular Potential ◽  
Band Profile ◽  
Gaseous Carbon Dioxide ◽  
Interaction Term ◽  
Path Lengths

The ν1 band of gaseous carbon dioxide has been studied in pressure-induced absorption at temperatures of ~ 190, ~ 300, and ~ 470 K, over a density range from 0.5 to 300 amagat, and with path lengths from 0.007 to 56 m. The observed temperature variation of the binary absorption coefficient can be satisfactorily accounted for only by adding a quadrupole–quadrupole interaction term to the usual Lennard–Jones model for the inter-molecular potential. The band profile is in agreement with the theory of quadrupole-induced absorption. There is some increase in the intensity of the band near the critical point due to the divergence of the correlation length. A very marked increase in the intensity is possibly prevented by the "cancellation effect".

Experimental and Numerical Modeling of Gaseous Carbon Dioxide Injecting Into Aqueous Water in Bottle Filler System

2001 ◽  
Author(s):  
Y. H. Zheng ◽  
R. S. Amano
Keyword(s):  
Carbon Dioxide ◽  
Numerical Modeling ◽  
Tap Water ◽  
Co2 Injection ◽  
Operating Characteristics ◽  
Two Phase ◽  
Carbonation Process ◽  
Filling System ◽  
Gas System ◽  
Gaseous Carbon Dioxide

Abstract An efficient enhancement of the carbonation rate in the bottle filling stage can substantially increase the production in beverage industries. The bottle filling system currently used in most of the manufacturers can still be improved for a better performance of carbonation by designing the injection tube system. This paper reports on an experimental and numerical mass transfer modeling that can simulate the dissolution process of gaseous carbon dioxide into aqueous water in the bottle filler system. In order to establish the operating characteristics of the bottle filler system, an ordinary tap water and pure carbon dioxide were used as the liquid-gas system. The two-phase numerical modeling was developed that can serve as a framework for the continuous improvement of the design of the carbonation process in the bottle filler system. For an optimal design of CO2 injection tube and flow conditions, a computational fluid dynamics (CFD) approach is one of the most power tools. However, since only limited experimental data are available in the open literature to verify the computational results, an experiment study was performed to obtain measurements of CO2 level, temperature, and pressure during the carbonation process in the bottle filled with liquid. Both experimental and numerical studies of various flow condition and different sizes of injection tube are presented in this paper.

Effect of high pressure gaseous carbon dioxide on the germination of bacterial spores

2004 ◽  
Vol 91 (2) ◽  
pp. 209-213 ◽  
Author(s):  
S. Furukawa ◽  
T. Watanabe ◽  
T. Tai ◽  
J. Hirata ◽  
N. Narisawa ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
High Pressure ◽  
Bacterial Spores ◽  
Gaseous Carbon Dioxide

Salen ligand complexes as electrocatalysts for direct electrochemical reduction of gaseous carbon dioxide to value added products

RSC Advances ◽  
2015 ◽  
Vol 5 (5) ◽  
pp. 3581-3589 ◽  
Author(s):  
Surya Singh ◽  
Bedika Phukan ◽  
Chandan Mukherjee ◽  
Anil Verma
Keyword(s):  
Carbon Dioxide ◽  
Electrochemical Reduction ◽  
Value Added ◽  
Salen Complexes ◽  
Gaseous Carbon Dioxide ◽  
Salen Ligand ◽  
Centrosymmetric Molecule ◽  
Value Added Products

CO2, being a linear and centrosymmetric molecule, is very stable, and the electrochemical reduction of CO2 requires energy. However, the salen complexes are found to be very efficient to minimize overpotential as compared to their metal counterparts.

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