scholarly journals The Rational Design of a Single-Component Photocatalyst for Gas-Phase CO2Reduction Using Both UV and Visible Light

2014 ◽  
Vol 1 (1) ◽  
pp. 1400013 ◽  
Author(s):  
Laura B. Hoch ◽  
Thomas E. Wood ◽  
Paul G. O'Brien ◽  
Kristine Liao ◽  
Laura M. Reyes ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Rational Design ◽  
Single Component

scholarly journals Solar Fuels: The Rational Design of a Single-Component Photocatalyst for Gas-Phase CO2 Reduction Using Both UV and Visible Light (Adv. Sci. 1/2014)

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
Laura B. Hoch ◽  
Thomas E. Wood ◽  
Paul G. O'Brien ◽  
Kristine Liao ◽  
Laura M. Reyes ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Rational Design ◽  
Co2 Reduction ◽  
Solar Fuels ◽  
Single Component

Photocatalytic oxidation of gas-phase Hg0 by carbon spheres supported visible-light-driven CuO–TiO2

2017 ◽  
Vol 46 ◽  
pp. 416-425 ◽  
Author(s):  
Jiang Wu ◽  
Chaoen Li ◽  
Xiantuo Chen ◽  
Jing Zhang ◽  
Lili Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Gas Phase ◽  
Photocatalytic Oxidation ◽  
Carbon Spheres ◽  
Visible Light Driven

Numerical Study of Bicomponent Droplet Vaporization in a High Pressure Environment

1996 ◽  
Author(s):  
J. Stengele ◽  
H.-J. Bauer ◽  
S. Wittig
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Gas Phase ◽  
Numerical Study ◽  
Droplet Evaporation ◽  
Single Component ◽  
Vapor Concentration ◽  
Diffusion Limit ◽  
Evaporation Process ◽  
Droplet Vaporization

The understanding of multicomponent droplet evaporation in a high pressure and high temperature gas is of great importance for the design of modern gas turbine combustors, since the different volatilities of the droplet components affect strongly the vapor concentration and, therefore, the ignition and combustion process in the gas phase. Plenty of experimental and numerical research is already done to understand the droplet evaporation process. Until now, most numerical studies were carried out for single component droplets, but there is still lack of knowledge concerning evaporation of multicomponent droplets under supercritical pressures. In the study presented, the Diffusion Limit Model is applied to predict bicomponent droplet vaporization. The calculations are carried out for a stagnant droplet consisting of heptane and dodecane evaporating in a stagnant high pressure and high temperature nitrogen environment. Different temperature and pressure levels are analyzed in order to characterize their influence on the vaporization behavior. The model employed is fully transient in the liquid and the gas phase. It accounts for real gas effects, ambient gas solubility in the liquid phase, high pressure phase equilibrium and variable properties in the droplet and surrounding gas. It is found that for high gas temperatures (T = 2000 K) the evaporation time of the bicomponent droplet decreases with higher pressures, whereas for moderate gas temperatures (T = 800 K) the lifetime of the droplet first increases and then decreases when elevating the pressure. This is comparable to numerical results conducted with single component droplets. Generally, the droplet temperature increases with higher pressures reaching finally the critical mixture temperature of the fuel components. The numerical study shows also that the same tendencies of vapor concentration at the droplet surface and vapor mass flow are observed for different pressures. Additionally, there is almost no influence of the ambient pressure on fuel composition inside the droplet during the evaporation process.

Calixarene receptors of environmentally hazardous and biorelevant molecules and ions

2008 ◽  
Vol 80 (7) ◽  
pp. 1449-1458 ◽  
Author(s):  
Vitaly I. Kalchenko
Keyword(s):  
Drug Design ◽  
Gas Phase ◽  
Crystalline State ◽  
Rational Design ◽  
Organic Molecules ◽  
Supramolecular Complexes

In the paper, a report on the rational design of the calixarene receptors bearing ligating, H-donor, H-acceptor fragments at the wide and/or narrow rim of the macrocycle is presented. The calixarenes form supramolecular complexes with various cations, anions, organic molecules, and biomolecules in solution, in the crystalline state and even in the gas phase. The calixarenes or their complexes can be used as materials for radionuclide extraction, construction of chemosensors, and drug design.

Multicomponent particle formation via gas-phase reactions of single-component precursors

1992 ◽  
Vol 23 ◽  
pp. 249-252 ◽  
Author(s):  
Q. Powell ◽  
J. Garvey ◽  
A. Gurav ◽  
M. Hampden-Smith ◽  
T. Kodas
Keyword(s):  
Gas Phase ◽  
Particle Formation ◽  
Single Component ◽  
Gas Phase Reactions

Monoclinic oxygen-deficient tungsten oxide nanowires for dynamic and independent control of near-infrared and visible light transmittance

2018 ◽  
Vol 5 (2) ◽  
pp. 291-297 ◽  
Author(s):  
Shengliang Zhang ◽  
Sheng Cao ◽  
Tianran Zhang ◽  
Qiaofeng Yao ◽  
Adrian Fisher ◽  
...  
Keyword(s):  
Visible Light ◽  
Tungsten Oxide ◽  
Near Infrared ◽  
Underlying Mechanism ◽  
Single Component ◽  
Light Transmittance ◽  
Independent Control ◽  
Oxide Nanowires ◽  
Electrochromic Material

Independent control of near-infrared and visible light using a single-component electrochromic material and its underlying mechanism are demonstrated.

scholarly journals Excited state dynamics for visible-light sensitization of a photochromic benzil-subsituted phenoxyl-imidazolyl radical

2019 ◽  
Vol 15 ◽  
pp. 2369-2379
Author(s):  
Yoichi Kobayashi ◽  
Yukie Mamiya ◽  
Katsuya Mutoh ◽  
Hikaru Sotome ◽  
Masafumi Koga ◽  
...  
Keyword(s):  
Visible Light ◽  
Rational Design ◽  
Materials Science ◽  
Transient Absorption ◽  
Life Sciences ◽  
Transient Absorption Spectroscopy ◽  
Back Reaction ◽  
Switching Speed ◽  
Wide Range ◽  
Potential Applications

Visible-light sensitized photoswitches have been paid particular attention in the fields of life sciences and materials science because long-wavelength light reduces photodegradation, transmits deep inside of matters, and achieves the selective excitation in condensed systems. Among various photoswitch molecules, the phenoxyl-imidazolyl radical complex (PIC) is a recently developed thermally reversible photochromic molecule whose thermal back reaction can be tuned from tens of nanoseconds to tens of seconds by rational design of the molecular structure. While the wide range of tunability of the switching speed of PIC opened up various potential applications, no photosensitivity to visible light limits its applications. In this study, we synthesized a visible-light sensitized PIC derivative conjugated with a benzil unit. Femtosecond transient absorption spectroscopy revealed that the benzil unit acts as a singlet photosensitizer for PIC by the Dexter-type energy transfer. Visible-light sensitized photochromic reactions of PIC are important for expanding the versatility of potential applications to life sciences and materials science.

Mechanism of CeVO4/TiO2 Photocatalytic Degradation of VOCs under Visible Light Irradiation: Electrochemical, Photoluminescence and Active Oxygen Species Study

2012 ◽  
Vol 217-219 ◽  
pp. 853-856 ◽  
Author(s):  
Han Jie Huang ◽  
Wen Long She ◽  
Ling Wen Yang
Keyword(s):  
Reactive Oxygen Species ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Gas Phase ◽  
Degradation Mechanism ◽  
Active Oxygen Species ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Composite Photocatalyst ◽  
Photocatalytic Degradation Mechanism

In this paper, CeVO4/TiO2 composite photocatalyst has been characterized by photoelectrochemical and reactive oxygen species trap techniques to reveal the mechanism for photocatalytic degradation of VOCs in gas-phase. Based on the measurement of flatband of the samples and the detection of reactive oxygen species, a visible light-induced photocatalytic degradation mechanism of VOCs on CeVO4/TiO2 is proposed.

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