In situ study of photo- and thermo-induced color centers in photochromic rutile TiO2 in the temperature range 90–720 K

2016 ◽  
Vol 15 (10) ◽  
pp. 1289-1298 ◽  
Author(s):  
V. N. Kuznetsov ◽  
N. I. Glazkova ◽  
R. V. Mikhaylov ◽  
N. Serpone
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Color Centers ◽  
Electron Traps ◽  
Rutile Tio2 ◽  
Temperature Range ◽  
In Situ Study ◽  
Visible Light Active

A novel cryostat-type accessory for a UV/Vis/NIR spectrophotometer was used to determine the relative positions of hole and electron traps within the band-gap of the visible-light-active TiO2 rutile.

High-pressure zinc oxide phase as visible-light-active photocatalyst with narrow band gap

2017 ◽  
Vol 5 (38) ◽  
pp. 20298-20303 ◽  
Author(s):  
Hadi Razavi-Khosroshahi ◽  
Kaveh Edalati ◽  
Ji Wu ◽  
Yuki Nakashima ◽  
Makoto Arita ◽  
...  
Keyword(s):  
High Pressure ◽  
Zinc Oxide ◽  
Visible Light ◽  
Band Gap ◽  
Narrow Band ◽  
Oxide Phase ◽  
Visible Light Active

High-pressure rocksalt ZnO with a band gap of 1.8 eV, which can absorb visible light.

Quantum dots in photocatalytic applications: efficiently enhancing visible light photocatalytic activity by integrating CdO quantum dots as sensitizers

2017 ◽  
Vol 19 (36) ◽  
pp. 24915-24927 ◽  
Author(s):  
A. H. Reshak
Keyword(s):  
Quantum Dots ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Band Gap ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Optical Band Gap ◽  
Visible Light Active ◽  
Photocatalytic Applications ◽  
Visible Light Photocatalytic

The amalgamation of a wide optical band gap photocatalyst with visible-light-active CdO quantum dots (QDs) as sensitizers is one of the most efficient ways to improve photocatalytic performance under visible light irradiation.

scholarly journals Band Gap Implications on Nano-TiO2 Surface Modification with Ascorbic Acid for Visible Light-Active Polypropylene Coated Photocatalyst

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 599 ◽  
Author(s):  
Chiara D’Amato ◽  
Rita Giovannetti ◽  
Marco Zannotti ◽  
Elena Rommozzi ◽  
Marco Minicucci ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Surface Modification ◽  
Visible Light ◽  
Band Gap ◽  
Tio2 Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Nano Tio2 ◽  
Alizarin Red ◽  
X Ray ◽  
Visible Light Active

The effect of surface modification using ascorbic acid as a surface modifier of nano-TiO2 heterogeneous photocatalyst was studied. The preparation of supported photocatalyst was made by a specific paste containing ascorbic acid modified TiO2 nanoparticles used to cover Polypropylene as a support material. The obtained heterogeneous photocatalyst was thoroughly characterized (scanning electron microscope (SEM), RAMAN, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and Diffuse Reflectance Spectra (DRS) and successfully applied in the visible light photodegradation of Alizarin Red S in water solutions. In particular, this new supported TiO2 photocatalyst showed a change in the adsorption mechanism of dye with respect to that of only TiO2 due to the surface properties. In addition, an improvement of photocatalytic performances in the visible light photodegration was obtained, showing a strict correlation between efficiency and energy band gap values, evidencing the favorable surface modification of TiO2 nanoparticles.

Hierarchical BiOCl microspheres with narrow band gap as visible light active photocatalysts

2016 ◽  
Vol 439 ◽  
pp. 123-129 ◽  
Author(s):  
Yong Li ◽  
Yayang Tian ◽  
Ruofang Zhang ◽  
Longlong Ma ◽  
Chaoxin Zhou ◽  
...  
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Narrow Band ◽  
Visible Light Active
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