Tailored d-Band Facilitating in Fe Gradient Doping CuO Boosts Peroxymonosulfate Activation for High Efficiency Generation and Release of Singlet Oxygen

2021 ◽  
Author(s):  
Shiyu Zuo ◽  
Dongya Li ◽  
Zeyu Guan ◽  
Fan Yang ◽  
Haiming Xu ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
High Efficiency

scholarly journals High-Efficiency Catalysis of Peroxymonosulfate by MgO for the Degradation of Organic Pollutants

Minerals ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 2 ◽  
Author(s):  
Qian Peng ◽  
Xuekun Tang ◽  
Kun Liu ◽  
Xianping Luo ◽  
Dongsheng He ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Organic Pollutants ◽  
High Efficiency ◽  
The Novel ◽  
Ph Values ◽  
Interesting Insight ◽  
Wide Range ◽  
First Time ◽  
Insight Into ◽  
Single Factor Experiment

In the study, magnesium oxide (MgO) was used to catalyze peroxymonosulfate (PMS) for the degradation of organic pollutants for the first time. According to the single-factor experiment results, it was determined that MgO could efficiently catalyze PMS to degrade organic matters in a wide range of pH values. Based on radical quenching experiments and electron spinning resonance spectra, singlet oxygen was identified to be the crucial reactive species. Importantly, the oxygen vacancy on the surface of MgO was determined as the key active site, which accelerated the decomposition of PMS to produce singlet oxygen. This study provides an interesting insight into the novel and ignored catalyst of MgO for the highly efficient activation of PMS, which will greatly benefit the Fenton-like catalytic degradation of organic wastewater.

High pressure electro-discharge singlet oxygen generator (ED SOG) with high efficiency and yield

2008 ◽  
Vol 41 (17) ◽  
pp. 172008 ◽  
Author(s):  
O V Braginsky ◽  
A S Kovalev ◽  
D V Lopaev ◽  
O V Proshina ◽  
T V Rakhimova ◽  
...  
Keyword(s):  
High Pressure ◽  
Singlet Oxygen ◽  
High Efficiency ◽  
Oxygen Generator ◽  
Singlet Oxygen Generator

Synthesis, photochemical and photophysical properties of novel unsymmetrically substituted zinc(II) phthalocyanines

2006 ◽  
Vol 10 (01) ◽  
pp. 55-62 ◽  
Author(s):  
Shaya Y. Al-Raqa
Keyword(s):  
Quantum Yield ◽  
Singlet Oxygen ◽  
High Efficiency ◽  
Photophysical Properties ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Boronic Acids ◽  
Free Base ◽  
Suzuki Coupling Reaction ◽  
Biological Substrate

The synthesis of three novel unsymmetrical free base, zinc(II) phthalocyanine derivatives obtained from 3,6-di-(thiophen-3-yl)phthalonitrile and 3,6-didecylphthalonitrile are described. The synthesis of novel 3,6-substituted phthalonitriles bearing heteroaromatic derivatives were achieved through Suzuki-coupling reaction by treatment of 3,6-di(trifluoromethanesulfonyloxy)phthalonitriles and heteroaromatic boronic acids. Two of the newly synthesized complexes showed a high efficiency against a model biological substrate, such as N-acetyl-L-tryptophanamide NATA, and shows a high singlet oxygen quantum yield.

Ozonides de phosphite source d'oxygène singulet: rendement, mécanisme

1985 ◽  
Vol 63 (11) ◽  
pp. 3203-3209 ◽  
Author(s):  
Anne Marie CaMinade ◽  
Fayez El Khatib ◽  
Max Koenig ◽  
Jean Marie Aubry
Keyword(s):  
Singlet Oxygen ◽  
High Efficiency ◽  
Lower Efficiency ◽  
Absolute Yield ◽  
The Absolute

The ozonides of several phosphites in solution in dichloromethane have been reacted with some scavengers of singlet oxygen (1O2) like rubrene (2), tetraphenylcyclopentadienone (4), and 9,10-diphenylanthracene (6). These ozonides react on the scavengers (−47 °C < t <30 °C) upon their decomposition. The Foote curves obtained by varying the respective concentrations of ozonides and of scavengers lead to parameters similar to those obtained upon the photooxidation of the scavengers by 1O2. Results confirm that these ozonides can lead to the formation of 1O2. The absolute yield of 1O2 is 100% (ρ = 1). These results also confirm the high efficiency of the rubrene toward 1O2 (γ = 1) and the lower efficiency of the tetraphenylcyclopentadienone (γ = 0.46). However, the low value (γ = 0.3) for the efficiency of the 9,10-diphenylanthracene (4) is unexpected.

Porphyrin and pyrene-based conjugated microporous polymer for efficient sequestration of CO2 and iodine and photosensitization for singlet oxygen generation

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75478-75481 ◽  
Author(s):  
Kyoung Chul Park ◽  
Jinhee Cho ◽  
Chang Yeon Lee
Keyword(s):  
Singlet Oxygen ◽  
Surface Area ◽  
High Efficiency ◽  
Bet Surface Area ◽  
Oxygen Generation ◽  
Singlet Oxygen Generation ◽  
Conjugated Microporous Polymer ◽  
Sequestration Of Co2 ◽  
Microporous Polymer

A novel porphyrin and pyrene-based conjugated microporous polymer (Por-Py-CMP) was synthesized. It exhibited a high BET surface area (1014 m2 g−1) and excellent capacity for capturing CO2 and I2. It also showed high efficiency for 1O2 generation.

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

Influence of MBE Growth Conditions on Dislocation Densities of GaAs/Ge Epilayers Grown on Silicon Substrates

1985 ◽  
Vol 43 ◽  
pp. 364-365
Author(s):  
K.M. Hones ◽  
P. Sheldon ◽  
B.G. Yacobi ◽  
A. Mason
Keyword(s):  
High Efficiency ◽  
Lattice Mismatch ◽  
Low Cost ◽  
Growth Conditions ◽  
Nonradiative Recombination ◽  
Device Structure ◽  
Si Substrates ◽  
Transmission Electron ◽  
Dislocation Densities ◽  
Dislocation Type

There is increasing interest in growing epitaxial GaAs on Si substrates. Such a device structure would allow low-cost substrates to be used for high-efficiency cascade- junction solar cells. However, high-defect densities may result from the large lattice mismatch (∼4%) between the GaAs epilayer and the silicon substrate. These defects can act as nonradiative recombination centers that can degrade the optical and electrical properties of the epitaxially grown GaAs. For this reason, it is important to optimize epilayer growth conditions in order to minimize resulting dislocation densities. The purpose of this paper is to provide an indication of the quality of the epitaxially grown GaAs layers by using transmission electron microscopy (TEM) to examine dislocation type and density as a function of various growth conditions. In this study an intermediate Ge layer was used to avoid nucleation difficulties observed for GaAs growth directly on Si substrates. GaAs/Ge epilayers were grown by molecular beam epitaxy (MBE) on Si substrates in a manner similar to that described previously.

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