Photocatalytic activity of Ag2MO4 (M = Cr, Mo, W) photocatalysts

2015 ◽  
Vol 3 (40) ◽  
pp. 20153-20166 ◽  
Author(s):  
Difa Xu ◽  
Bei Cheng ◽  
Jinfeng Zhang ◽  
Weikang Wang ◽  
Jiaguo Yu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Photocatalytic Activity ◽  
Light Absorption

The photocatalytic activity and stability of Ag2MO4 (M = Cr, Mo, W) photocatalysts highly depend on their light-absorption, crystal structure and electronic structure.

ChemInform Abstract: Crystal Structure, Electronic Structure, and Photocatalytic Activity of Oxysulfides: La2Ta2ZrS2O8, La2Ta2TiS2O8, and La2Nb2TiS2O8.

ChemInform ◽  
2016 ◽  
Vol 47 (24) ◽  
Author(s):  
Yosuke Goto ◽  
Jeongsuk Seo ◽  
Kazunori Kumamoto ◽  
Takashi Hisatomi ◽  
Yoshikazu Mizuguchi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Photocatalytic Activity

A novel Bi-based phosphomolybdate photocatalyst K2Bi(PO4)(MoO4): Crystal structure, electronic structure and photocatalytic activity

2014 ◽  
Vol 51 ◽  
pp. 455-459 ◽  
Author(s):  
Hongwei Huang ◽  
Gong Chen ◽  
Shuobo Wang ◽  
Lei Kang ◽  
Zheshuai Lin ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Photocatalytic Activity

Crystal Structure, Electronic Structure, and Photocatalytic Activity of Oxysulfides: La2Ta2ZrS2O8, La2Ta2TiS2O8, and La2Nb2TiS2O8

2016 ◽  
Vol 55 (7) ◽  
pp. 3674-3679 ◽  
Author(s):  
Yosuke Goto ◽  
Jeongsuk Seo ◽  
Kazunori Kumamoto ◽  
Takashi Hisatomi ◽  
Yoshikazu Mizuguchi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Photocatalytic Activity

scholarly journals The origin of enhanced photocatalytic activities of hydrogenated TiO2 nanoparticles

2017 ◽  
Vol 46 (32) ◽  
pp. 10694-10699 ◽  
Author(s):  
Yani Liu ◽  
Haifeng Feng ◽  
Xiaobing Yan ◽  
Jiaou Wang ◽  
Huagui Yang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photocatalytic Activity ◽  
Tio2 Nanoparticles ◽  
Light Absorption ◽  
Active Sites ◽  
Size Structure ◽  
Charge Carriers ◽  
Photocatalytic Activities ◽  
Catalytically Active ◽  
Photoinduced Charge

The photocatalytic activity of semiconductors is largely governed by their light absorption, separation of photoinduced charge carriers and surface catalytically active sites, which are primarily controlled by the morphology, crystalline size, structure, and especially the electronic structure of photocatalysts.

Structural/Property Relationships for Optical Materials

1993 ◽  
Vol 329 ◽  
Author(s):  
Vivien D.
Keyword(s):  
Crystal Structure ◽  
Optical Properties ◽  
Electronic Structure ◽  
Chemical Composition ◽  
Field Strength ◽  
Optical Materials ◽  
Site Occupancy ◽  
Laser Materials ◽  
Crystal Field Strength ◽  
The Matrix

AbstractIn this paper the relationships between the crystal structure, chemical composition and electronic structure of laser materials, and their optical properties are discussed. A brief description is given of the different laser activators and of the influence of the matrix on laser characteristics in terms of crystal field strength, symmetry, covalency and phonon frequencies. The last part of the paper lays emphasis on the means to optimize the matrix-activator properties such as control of the oxidation state and site occupancy of the activator and influence of its concentration.

Impact of Rutile Fraction on TiO2 Visible-Light Absorption and Visible-Light-Induced Photocatalytic Activity

2018 ◽  
Author(s):  
David Maria Tobaldi ◽  
Luc Lajaunie ◽  
ana caetano ◽  
nejc rozman ◽  
Maria Paula Seabra ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Light Absorption ◽  
Solid Phase ◽  
Diffraction Method ◽  
Band Alignment ◽  
Quantitative Phase Analysis ◽  
Transmission Microscopy ◽  
Visible Light Absorption ◽  
X Ray

<div>Titanium dioxide is by far the most utilised semiconductor material for photocatalytic applications. Still, it is transparent to visible-light. Recently, it has been proved that a type-II band alignment for the rutile−anatase mixture would improve its visible-light absorption.</div><div>In this research paper we thoroughly characterised the real crystalline and amorphous phases of synthesised titanias – thermally treated at different temperatures to get distinct ratios of anatase-rutile-amorphous fraction – as well as that of three commercially available photocatalytic nano-TiO2. </div><div>The structural characterisation was done via advanced X-ray diffraction method, namely the Rietveld-RIR method, to attain a full quantitative phase analysis of the specimens. The microstructure was also investigated via an advanced X-ray method, the whole powder pattern modelling. These methods were validated combining advanced aberration-corrected scanning transmission microscopy and high-resolution electron energy-loss spectroscopy. The photocatalytic activity was assessed in the liquid- and gas-solid phase (employing rhodamine B and 4-chlorophenol, and isopropanol, respectively, as the organic substances to degrade) using a light source irradiating exclusively in the visible-range.</div><div>Optical spectroscopy showed that even a small fraction of rutile (2 wt%) is able to shift to lower energies the apparent optical band gap of an anatase-rutile mixed phase. But is this enough to attain a real photocatalytic activity promoted by merely visible-light?</div><div>We tried to give a reply to that question.</div><div>Photocatalytic activity results in the liquid-solid phase showed that a high surface hydroxylation led to specimen with superior visible light-induced catalytic activity (i.e. dye and ligand-to-metal charge transfer complexes sensitisation effects). That is: not photocatalysis <i>sensu-strictu</i>.</div><div>On the other hand, the gas-solid phase results showed that a higher amount of the rutile fraction (around 10 wt%), together with less recombination of the charge carriers, were more effective for an actual photocatalytic oxidation of isopropanol.</div>

Sign in / Sign up

Export Citation Format

Share Document