Preparation of 1D ultrathin niobate nanobelts by liquid exfoliation as photocatalysts for hydrogen generation

2019 ◽  
Vol 55 (17) ◽  
pp. 2417-2420
Author(s):  
Fangrui Cheng ◽  
Xin Jiang ◽  
Zepeng Zhang ◽  
Renzhi Ma ◽  
Takayoshi Sasaki ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Driving Force ◽  
Hydrogen Generation ◽  
High Photocatalytic Activity ◽  
One Dimensional ◽  
Liquid Exfoliation ◽  
Hydrolysis Of

The original driving force for the exfoliation of RbNbO3 to form one-dimensional (1D) niobate nanobelts is the combination of the hydration of Rb+ and the hydrolysis of (NbO3)nn− and the 1D ultrathin nanobelts show high photocatalytic activity.

scholarly journals On Photocatalytic Activity of Systems of Titania/(Fe (II, III))-Type in Aqueous Suspensions

2018 ◽  
Vol 17 (6) ◽  
pp. 521-527
Author(s):  
V. A. Gorbunova ◽  
L. M. Sliapniova
Keyword(s):  
Photocatalytic Activity ◽  
Oxidation Reaction ◽  
High Photocatalytic Activity ◽  
Organic Dye ◽  
Iron Ions ◽  
Physico Chemical ◽  
Photocatalytic System ◽  
Initial Suspension ◽  
Hydrolysis Of ◽  
Chemical Water

. The photocatalytic activity of three systems, promising for chemical water purification technologies, was experimentally compared, based on a combination of titanium dioxide/(Fe(II, III)), applying to the model oxidation reaction of methylorange organic dye in an aqueous medium. Herewith the cases of photocatalytic systems were investigated, which are based on: a) titania hydrosol obtained by hydrolysis of titanium isobutylate; b) a similar hydrosol with addition of Fe(III) ions; c) suspension of ilmenite powder based on FeTiO3. As a result of the investigation, the increase of the rate of destruction of methylorange by more than two times was found in the system with the introduction of a small amount of iron ions into initial suspension of the TiO2 hydrosol (at the obtaining a medium with the Fe3+ concentration up to 3.7 × 10–5 M). In the photocatalytic system, based on the suspension of pretreated (with suphation and calcination) ilmenite powder, enough high photocatalytic activity (the degree of methylorange decomposition up to 77 %) was measured but at a higher exposure than for the case of systems based on the TiO2 hydrosol. For the photocatalytic systems of the type being investigated, a possible mechanism of increasing their oxidative activity was briefly considered, which requires an additional physico-chemical analysis.

Synthesis and Characterization of Low-Dimensional Structure Photocatalyst BaGeGa6O12

2010 ◽  
Vol 445 ◽  
pp. 191-194
Author(s):  
Miki Nishiya ◽  
Kazuyoshi Uematsu ◽  
Tadashi Ishigaki ◽  
Kenji Toda ◽  
Mineo Sato
Keyword(s):  
Photocatalytic Activity ◽  
Water Splitting ◽  
High Photocatalytic Activity ◽  
Dimensional Structure ◽  
Synthesis And Characterization ◽  
Layered Perovskite ◽  
One Dimensional ◽  
Low Dimensional

Low-dimensional structure compounds as layered perovskite shows high photocatalytic activity in water splitting. In this study, we investigated that synthesis and characterization of photocatalytic activity of BaGeGa6O12 with a one-dimensional structure. BaGeGa6O12 with loading 0.3wt% RuO2 showed a photocatalytic activity for water splitting into H2 (70.6 μ mol / h) and O2 (28.1 μ mol / h).

Nonaqueous synthesis of CoOx/TiO2 nanocomposites showing high photocatalytic activity of hydrogen generation

2013 ◽  
Vol 142-143 ◽  
pp. 626-632 ◽  
Author(s):  
Yu-Fen Wang ◽  
Meng-Chun Hsieh ◽  
Jyh-Fu Lee ◽  
Chia-Min Yang
Keyword(s):  
Photocatalytic Activity ◽  
Hydrogen Generation ◽  
High Photocatalytic Activity ◽  
Nonaqueous Synthesis

Novel one-dimensional Bi2O3–Bi2WO6 p–n hierarchical heterojunction with enhanced photocatalytic activity

2014 ◽  
Vol 2 (22) ◽  
pp. 8517-8524 ◽  
Author(s):  
Yin Peng ◽  
Mei Yan ◽  
Qing-Guo Chen ◽  
Cong-Min Fan ◽  
Hai-Yan Zhou ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Compounds ◽  
Visible Light Irradiation ◽  
Electrostatic Field ◽  
High Photocatalytic Activity ◽  
Light Irradiation ◽  
Junction Region ◽  
One Dimensional ◽  
Photogenerated Electrons

A novel Bi2O3–Bi2WO6 p–n junction photocatalyst exhibits high photocatalytic activity for the degradation of organic compounds under solar/visible light irradiation, which is ascribed to the effective separation of photogenerated electrons and holes by the internal electrostatic field in the junction region.

scholarly journals Synthesis of titanium(IV) oxide of ultra-high photocatalytic activity: high-temperature hydrolysis of titanium alkoxides with water liberated homogeneously from solvent alcohols

1999 ◽  
Vol 144 (1) ◽  
pp. 165-171 ◽  
Author(s):  
Hiroshi Kominami ◽  
Jun-ichi Kato ◽  
Shin-ya Murakami ◽  
Yoshiya Kera ◽  
Masashi Inoue ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
High Temperature ◽  
High Photocatalytic Activity ◽  
Titanium Alkoxides ◽  
Hydrolysis Of

New facile synthesis of one-dimensional Ag@TiO2 anatase core–shell nanowires for enhanced photocatalytic properties

RSC Advances ◽  
2014 ◽  
Vol 4 (103) ◽  
pp. 59114-59117 ◽  
Author(s):  
Qingsong Dong ◽  
Hongchao Yu ◽  
Zhengbo Jiao ◽  
Gongxuan Lu ◽  
Yingpu Bi
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Organic Contaminants ◽  
High Photocatalytic Activity ◽  
Core Shell ◽  
Facile Synthesis ◽  
One Dimensional ◽  
Tio2 Anatase ◽  
Shell Nanowires

One-dimensional Ag@TiO2 anatase core–shell nanowires are fabricated and exhibit high photocatalytic activity for degrading organic contaminants under visible-light irradiation.

Visible light-induced hydrogen generation using colloidal (ZnS)0.4(AgInS2)0.6 nanocrystals capped by S2− ions

2015 ◽  
Vol 3 (16) ◽  
pp. 8276-8279 ◽  
Author(s):  
Metikoti Jagadeeswararao ◽  
Sunita Dey ◽  
Angshuman Nag ◽  
C. N. R. Rao
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Generation ◽  
High Photocatalytic Activity ◽  
Co Catalyst ◽  
Visible Light Active

Non-toxic and visible-light active S2−-capped (ZnS)0.4(AgInS2)0.6 nanocrystals exhibit high photocatalytic activity for H2 evolution from water without requiring any co-catalyst.

scholarly journals Photocatalytically Active Ladder Polymers

2018 ◽  
Author(s):  
Anastasia Vogel ◽  
Mark forster ◽  
Liam Wilbraham ◽  
Charlotte Smith ◽  
Alexander Cowan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Organic Semiconductors ◽  
Conjugated Polymer ◽  
Driving Force ◽  
Transient Absorption ◽  
High Photocatalytic Activity ◽  
Transient Absorption Spectroscopy ◽  
Proton Reduction ◽  
Hole Scavenger ◽  
Ladder Polymers

<p>Conjugated ladder polymers (cLaPs) are introduced as organic semiconductors for photocatalytic hydrogen evolution from water under sacrificial conditions. Starting from a linear conjugated polymer (cLiP1), two ladder polymers are synthesized via post-polymerization annulation and oxidation techniques to generate rigidified, planarized materials bearing dibenzo[<i>b</i>,<i>d</i>]thiophene (<b>cLaP1</b>) and dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone subunits (<b>cLaP2</b>). The high photocatalytic activity of <b>cLaP1</b> (1307 μmol h<sup>−1</sup> g<sup>−1</sup>) in comparison to <b>cLaP2</b> (18 μmol h<sup>−1</sup> g<sup>−1</sup>) under broadband illumination (λ >295 nm) in presence of a hole-scavenger is attributed to a higher yield of long-lived charges (µs–ms timescale), as evidenced by transient absorption spectroscopy. Additionally, <b>cLaP1</b> has a larger overpotential for proton reduction and thus an increased driving force for the evolution of hydrogen under sacrificial conditions.</p>

scholarly journals Photocatalytically Active Ladder Polymers

2018 ◽  
Author(s):  
Anastasia Vogel ◽  
Mark forster ◽  
Liam Wilbraham ◽  
Charlotte Smith ◽  
Alexander Cowan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Organic Semiconductors ◽  
Conjugated Polymer ◽  
Driving Force ◽  
Transient Absorption ◽  
High Photocatalytic Activity ◽  
Transient Absorption Spectroscopy ◽  
Proton Reduction ◽  
Hole Scavenger ◽  
Ladder Polymers

<p>Conjugated ladder polymers (cLaPs) are introduced as organic semiconductors for photocatalytic hydrogen evolution from water under sacrificial conditions. Starting from a linear conjugated polymer (cLiP1), two ladder polymers are synthesized via post-polymerization annulation and oxidation techniques to generate rigidified, planarized materials bearing dibenzo[<i>b</i>,<i>d</i>]thiophene (<b>cLaP1</b>) and dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone subunits (<b>cLaP2</b>). The high photocatalytic activity of <b>cLaP1</b> (1307 μmol h<sup>−1</sup> g<sup>−1</sup>) in comparison to <b>cLaP2</b> (18 μmol h<sup>−1</sup> g<sup>−1</sup>) under broadband illumination (λ >295 nm) in presence of a hole-scavenger is attributed to a higher yield of long-lived charges (µs–ms timescale), as evidenced by transient absorption spectroscopy. Additionally, <b>cLaP1</b> has a larger overpotential for proton reduction and thus an increased driving force for the evolution of hydrogen under sacrificial conditions.</p>

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