scholarly journals Innenrücktitelbild: The Redox Coupling Effect in a Photocatalytic Ru II ‐Pd II Cage with TTF Guest as Electron Relay Mediator for Visible‐Light Hydrogen‐Evolving Promotion (Angew. Chem. 7/2020)

2020 ◽  
Vol 132 (7) ◽  
pp. 2935-2935
Author(s):  
Kai Wu ◽  
Kang Li ◽  
Sha Chen ◽  
Ya‐Jun Hou ◽  
Yu‐Lin Lu ◽  
...  
Keyword(s):  
Visible Light ◽  
Coupling Effect

Visible-light-induced photocatalysis and peroxymonosulfate activation over ZnFe2O4 fine nanoparticles for degradation of Orange II

2016 ◽  
Vol 6 (7) ◽  
pp. 2296-2304 ◽  
Author(s):  
Kaixin Zhu ◽  
Junhu Wang ◽  
Yanjie Wang ◽  
Changzi Jin ◽  
Ayyakannu Sundaram Ganeshraja
Keyword(s):  
Visible Light ◽  
Coupling Effect ◽  
Orange Ii

The coupling effect of photocatalysis and PMS activation remarkably manifested in the eco-friendly ZnFe2O4/PMS/vis system for Orange II degradation.

scholarly journals TiO2 Nanoparticles Anchoring on Two-Dimensional Bi2Se3 Nanosheet As An Enhanced Visible Light Catalyst

2021 ◽  
Author(s):  
Chengbin Guo ◽  
Rong Hu ◽  
Hui Qiao ◽  
Chenguang Duan ◽  
Xiang Qi
Keyword(s):  
Visible Light ◽  
Coupling Effect ◽  
Photogenerated Electron ◽  
Photocurrent Density ◽  
High Specific Surface Area ◽  
Ultraviolet Region ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
Photocatalytic Application

Abstract Titanium dioxide (TiO2) has been widely studied in the field of photocatalysis. However, the development of TiO2 was limited by the photoresponse only in the ultraviolet region and the rapid recombination of photogenerated electron-hole pairs. In this work, TiO2 and two-dimensional (2D) bismuth selenide (Bi2Se3) hybrid nanosheets (TiO2/Bi2Se3 HNs) have been prepared via a simple ultrasonic route. X-ray diffraction pattern and Raman spectra were carried out to confirm that as-prepared samples were pure and well crystalized. Besides, the microstructure characterization proves that 2D Bi2Se3 nanosheets have high specific surface area and can serve as a stable platform to construct the intimate interaction with TiO2. Furthermore, photoelectrochemical (PEC) measurements demonstrate that the TiO2/Bi2Se3 HNs exhibit excellent photocatalytic performance under visible light, which were much better than pure TiO2 and Bi2Se3. More importantly, the photocurrent density was quite stable and only dropped by 10% after 125 cycles. In summary, the improved photocatalytic activity is due to the unique characteristic of 2D Bi2Se3 nanosheets, such as maximized reaction sites and good electrical conductivity, and the positive coupling effect of the TiO2/Bi2Se3 heterojunction. This study indicates that TiO2/Bi2Se3 HNs photocatalysts have excellent potential for photocatalytic application.

The Redox Coupling Effect in a Photocatalytic Ru II ‐Pd II Cage with TTF Guest as Electron Relay Mediator for Visible‐Light Hydrogen‐Evolving Promotion

2019 ◽  
Vol 132 (7) ◽  
pp. 2661-2665 ◽  
Author(s):  
Kai Wu ◽  
Kang Li ◽  
Sha Chen ◽  
Ya‐Jun Hou ◽  
Yu‐Lin Lu ◽  
...  
Keyword(s):  
Visible Light ◽  
Coupling Effect

Studies of metaphase chromosomes in the scanning transmission x-ray microscope: Image fidelity, radiation damage and specimen preparation

1992 ◽  
Vol 50 (2) ◽  
pp. 1038-1039
Author(s):  
Shawn Williams ◽  
Xiaodong Zhang ◽  
Susan Lamm ◽  
Jack Van’t Hof
Keyword(s):  
Visible Light ◽  
Radiation Damage ◽  
Cross Section ◽  
Imaging Techniques ◽  
Dose Range ◽  
Specimen Preparation ◽  
X Rays ◽  
Metaphase Chromosomes ◽  
X Ray ◽  
Scanning Transmission

The Scanning Transmission X-ray Microscope (STXM) is well suited for investigating metaphase chromosome structure. The absorption cross-section of soft x-rays having energies between the carbon and oxygen K edges (284 - 531 eV) is 6 - 9.5 times greater for organic specimens than for water, which permits one to examine unstained, wet biological specimens with resolution superior to that attainable using visible light. The attenuation length of the x-rays is suitable for imaging micron thick specimens without sectioning. This large difference in cross-section yields good specimen contrast, so that fewer soft x-rays than electrons are required to image wet biological specimens at a given resolution. But most imaging techniques delivering better resolution than visible light produce radiation damage. Soft x-rays are known to be very effective in damaging biological specimens. The STXM is constructed to minimize specimen dose, but it is important to measure the actual damage induced as a function of dose in order to determine the dose range within which radiation damage does not compromise image quality.

Scanning luminescence x-ray microscopy: Progress toward selective staining using microspheres

1994 ◽  
Vol 52 ◽  
pp. 74-75
Author(s):  
C. Jacobsen ◽  
J. Fu ◽  
S. Mayer ◽  
Y. Wang ◽  
S. Williams
Keyword(s):  
Visible Light ◽  
Active Sites ◽  
Light Emission ◽  
Chinese Hamster ◽  
Polystyrene Spheres ◽  
Good Resistance ◽  
X Ray ◽  
Selective Staining ◽  
Visible Light Emission ◽  
Specific Labelling

In scanning luminescence x-ray microscopy (SLXM), a high resolution x-ray probe is used to excite visible light emission (see Figs. 1 and 2). The technique has been developed with a goal of localizing dye-tagged biochemically active sites and structures at 50 nm resolution in thick, hydrated biological specimens. Following our initial efforts, Moronne et al. have begun to develop probes based on biotinylated terbium; we report here our progress towards using microspheres for tagging.Our initial experiments with microspheres were based on commercially-available carboxyl latex spheres which emitted ~ 5 visible light photons per x-ray absorbed, and which showed good resistance to bleaching under x-ray irradiation. Other work (such as that by Guo et al.) has shown that such spheres can be used for a variety of specific labelling applications. Our first efforts have been aimed at labelling ƒ actin in Chinese hamster ovarian (CHO) cells. By using a detergent/fixative protocol to load spheres into cells with permeabilized membranes and preserved morphology, we have succeeded in using commercial dye-loaded, spreptavidin-coated 0.03μm polystyrene spheres linked to biotin phalloidon to label f actin (see Fig. 3).

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