Prediction of nodal-line semimetals in 2D ScX (X = P, As) with high stability and considerable fermi velocities

Aims: To evaluate the real-life effect of photocatalytic surfaces on the air quality at two test-sites in Denmark. Background: Poor air quality is today one of the largest environmental issues, due to the adverse effects on human health associated with high levels of air pollution, including respiratory issues, cardiovascular disease (CVD), and lung cancer. NOx removal by TiO2 based photocatalysis is a tool to improve air quality locally in areas where people are exposed. Methods: Two test sites were constructed in Roskilde and Copenhage airport. In Roskilde, the existing asphalt at two parking lots was treated with TiO2 containing liquid and an in-situ ISO 22197-1 test setup was developed to enable in-situ evaluation of the activity of the asphalt. In CPH airport, photocatalytic concrete tiles were installed at the "kiss and fly" parking lot, and NOx levels were continuously monitored in 0.5 m by CLD at the active site and a comparable reference site before and after installation for a period of 2 years. Results: The Roskilde showed high stability of the photocatalytic coating with the activity being largely unchanged over a period of 2 years. The CPH airport study showed that the average NOx levels were decreased by 12 % comparing the before and after NOx concentrations at the active and reference site. Conclusion: The joined results of the two Danish demonstration projects illustrate a high stability of the photocatalytic coating as well as a high potential for improvements of the real-life air quality in polluted areas.

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Endo-D-galacturonanase immobilized by adsorption on porous polyethyleneterephthalate

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19822716 ◽

1982 ◽

Vol 47 (10) ◽

pp. 2716-2723 ◽

Cited By ~ 15

Author(s):

Lubomíra Rexová-Benková ◽

Jiřina Omelková ◽

Vladimír Kubánek

Keyword(s):

Ionic Strength ◽

High Stability ◽

Relative Activity ◽

Operational Stability ◽

The Other ◽

Fixation Strength ◽

Action Pattern ◽

Salt Solutions ◽

Buffer Solution ◽

Degradation Degree

Endo-D-galacturonanase of Aspergillus sp. was irreversibly adsorbed on polyethyleneterephthalate in an acetate 0.1 mol l-1 buffer solution of pH 4.2. Immobilization of the enzyme resulted in lowering of its activity, the measure of which depended on the amount of the enzyme fixed on the carrier. The highest relative activity (42.4%) had the preparation containing 5.25 mg of the enzyme per 1 g of the carrier. The velocity and intensity of the sorption of the enzyme depended on the ionic strength of the medium, whilst pH, on the other hand, was of no influence. Endo-D-galacturonanase immobilized in a 0.1 mol l-1 buffer was characteristic a) of its fixation strength in salt solutions of various ionic strength and pH, in a 3 mol l-1 guanidine solution, and also in sodium pectate and pectin solutions, b) of its high stability during a long-lasting storage at 4 °C, c) of its operational stability. The immobilization led to a partial change of the action pattern onto the high-molecular substrate, manifested in lowering the decrease of viscosity to degradation degree ratio.

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Stability of radical anions derived from substituted 5-nitrofurans investigated by ESR spectroscopy

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19851594 ◽

1985 ◽

Vol 50 (7) ◽

pp. 1594-1601 ◽

Cited By ~ 5

Author(s):

Jiří Klíma ◽

Larisa Baumane ◽

Janis Stradinš ◽

Jiří Volke ◽

Romualds Gavars

Keyword(s):

Radical Anion ◽

High Stability ◽

Esr Spectroscopy ◽

Reaction Path ◽

Order Reaction ◽

Second Order ◽

Radical Anions ◽

Second Order Reaction ◽

Unpaired Electron Density ◽

The Stability

It has been found that the decay in dimethylformamide and dimethylformamide-water mixtures of radical anions in five of the investigated 5-nitrofurans is governed by a second-order reaction. Only the decay of the radical anion generated from 5-nitro-2-furfural III may be described by an equation including parallel first- and second-order reactions; this behaviour is evidently caused by the relatively high stability of the corresponding dianion, this being an intermediate in the reaction path. The presence of a larger conjugated system in the substituent in position 2 results in a decrease of the unpaired electron density in the nitro group and, consequently, an increase in the stability of the corresponding radical anions.

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Superflexible C68-graphyne as a promising anode material for lithium-ion batteries

Journal of Materials Chemistry A ◽

10.1039/c9ta05955e ◽

2019 ◽

Vol 7 (29) ◽

pp. 17357-17365 ◽

Cited By ~ 5

Author(s):

Bozhao Wu ◽

Xiangzheng Jia ◽

Yanlei Wang ◽

Jinxi Hu ◽

Enlai Gao ◽

...

Keyword(s):

Lithium Ion Batteries ◽

Anode Material ◽

Carrier Mobility ◽

High Stability ◽

High Capacity ◽

Lithium Ion

A new graphyne with high stability, excellent flexibility and carrier mobility is theoretically predicted as a promising anode material for lithium-ion batteries with high capacity.

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Computation and data driven discovery of topological phononic materials

Nature Communications ◽

10.1038/s41467-021-21293-2 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Jiangxu Li ◽

Jiaxi Liu ◽

Stanley A. Baronett ◽

Mingfeng Liu ◽

Lei Wang ◽

...

Keyword(s):

High Throughput Screening ◽

Electronic System ◽

Nodal Line ◽

Data Driven ◽

Single Type ◽

Type I ◽

Structure Property ◽

Topological Quantum ◽

Data Driven Approach ◽

Spin Electronic

AbstractThe discovery of topological quantum states marks a new chapter in both condensed matter physics and materials sciences. By analogy to spin electronic system, topological concepts have been extended into phonons, boosting the birth of topological phononics (TPs). Here, we present a high-throughput screening and data-driven approach to compute and evaluate TPs among over 10,000 real materials. We have discovered 5014 TP materials and grouped them into two main classes of Weyl and nodal-line (ring) TPs. We have clarified the physical mechanism for the occurrence of single Weyl, high degenerate Weyl, individual nodal-line (ring), nodal-link, nodal-chain, and nodal-net TPs in various materials and their mutual correlations. Among the phononic systems, we have predicted the hourglass nodal net TPs in TeO3, as well as the clean and single type-I Weyl TPs between the acoustic and optical branches in half-Heusler LiCaAs. In addition, we found that different types of TPs can coexist in many materials (such as ScZn). Their potential applications and experimental detections have been discussed. This work substantially increases the amount of TP materials, which enables an in-depth investigation of their structure-property relations and opens new avenues for future device design related to TPs.

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