New Porous Visible Light Active Photocatalysts of MOx-Titanate (M = Cr, Ni) Nanohybrids

2006 ◽  
Vol 45 ◽  
pp. 779-786
Author(s):  
S.J. Hwang ◽  
T.W. Kim
Keyword(s):  
Photocatalytic Activity ◽  
Metal Oxide ◽  
Visible Light ◽  
Layer By Layer ◽  
Narrow Bandgap ◽  
Visible Light Active ◽  
Visible Light Driven ◽  
Oxide Particles ◽  
Adsorption Desorption ◽  
First Time

We have synthesized for the first time efficient visible light active photocatalysts of porous MOx-Ti1.83O4 (M = Ni, Cr) heterostructure through an exfoliation-restacking route. XRD, SEM, TEM, and XAS results reveal that the titanate nanosheets and the nanosized metal oxide particles are well ordered in layer-by-layer way. N2 adsorption-desorption isotherm and diffuse UV-vis spectroscopic analyses demonstrate that the present nanohybrids have a large surface area (~190-240 m2/g) and a narrow bandgap (~1.6-2.4 eV), which are ascribable to the formation of porous structure and a coupling of the wide bandgap titanate and the narrow bandgap metal oxide species, respectively. These nanohybrids show an enhanced photocatalytic activity to effectively decompose organic compounds under the irradiation of visible light. The present results highlight that the exfoliation-restacking route can provide a very powerful way of developing novel heterostructured materials with efficient visible light driven photocatalytic activity.

scholarly journals A promising visible light-driven photocatalytic activity of conjugated polymer nanocrystals

RSC Advances ◽  
2018 ◽  
Vol 8 (68) ◽  
pp. 38773-38779
Author(s):  
Chanon Pornrungroj ◽  
Mamiko Ozawa ◽  
Tsunenobu Onodera ◽  
Hidetoshi Oikawa
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Conjugated Polymer ◽  
Visible Light Active ◽  
Visible Light Driven

Demonstration of conjugated polymer nanocrystals as highly visible-light-active photocatalysts.

Synthesis of Mesoporous V-TiO2 with Different Surfactants: The Effect of Surfactant Type on Photocatalytic Properties

2013 ◽  
Vol 702 ◽  
pp. 56-61 ◽  
Author(s):  
Rahmatollah Rahimi ◽  
Masoumeh Mahjoub Moghaddas ◽  
Solmaz Zargari ◽  
Rahim Rahimi
Keyword(s):  
Photocatalytic Activity ◽  
Gemini Surfactant ◽  
Nitrogen Adsorption ◽  
Pluronic F127 ◽  
Pluronic P123 ◽  
Visible Light Driven ◽  
Ft Ir ◽  
Doped Titania ◽  
Adsorption Desorption ◽  
First Time

Mesoporous vanadium doped titania (V-TiO2) photocatalyst was synthesized with the use of a new surfactant (Gemini) for the first time. In order to investigate the surfactant effect on the photocatalytic activity of catalysts, different surfactants containing Gemini, pluronic F127, pluronic P123, CTAB, Hexadecylamine and PEG 6000 were used in the preparation of mesoporous V-TiO2photocatalyst as a templating agent. The catalysts were characterized by FT-IR, XRD, SEM, EDX, nitrogen adsorption-desorption isotherm, and DRS. The nanosized V-TiO2 with Gemini surfactant (V-TiO2(G)) exhibited the highest visible light driven photocatalytic efficiency for degrading MO dye. The results showed that the surfactant type played an important role on the structure and photocatalytic activity of the samples.

A visible-light active catechol–metal oxide carbonaceous polymeric material for enhanced photocatalytic activity

2017 ◽  
Vol 5 (1) ◽  
pp. 384-396 ◽  
Author(s):  
P. Karthik ◽  
R. Vinoth ◽  
P. Selvam ◽  
E. Balaraman ◽  
M. Navaneethan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Metal Oxide ◽  
Visible Light ◽  
Polymeric Material ◽  
Sustainable Energy ◽  
Chemical Science ◽  
Environmental Applications ◽  
New Materials ◽  
Visible Light Active

Designing new materials for sustainable energy and environmental applications is one of the prime focuses in chemical science.

One-step synthesis, electronic structure, and photocatalytic activity of earth-abundant visible-light-driven FeAl2O4

2017 ◽  
Vol 19 (14) ◽  
pp. 9392-9401 ◽  
Author(s):  
Hui-Ying Mu ◽  
Fa-Tang Li ◽  
Xing-Tao An ◽  
Rui-Hong Liu ◽  
Yi-Lei Li ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Earth Abundant ◽  
Visible Light Driven ◽  
One Step ◽  
First Time

An inexpensive FeAl2O4 photocatalyst is developed via one-step synthesis and its electronic structure is given for the first time.

Novel p–n junction UiO-66/BiOI photocatalysts with efficient visible-light-induced photocatalytic activity

2018 ◽  
Vol 77 (5) ◽  
pp. 1441-1448 ◽  
Author(s):  
Yuejin Li ◽  
Xili Shang ◽  
Changhai Li ◽  
Xiaoming Huang ◽  
Jingjing Zheng
Keyword(s):  
Electron Microscopy ◽  
Photocatalytic Activity ◽  
Salicylic Acid ◽  
Visible Light ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Uv Visible ◽  
Adsorption Desorption ◽  
Junction Structure ◽  
First Time

Abstract Novel visible-light-induced UiO-66/BiOI photocatalysts with a p–n junction structure have been prepared for the first time through a facile hydrothermal method. The prepared photocatalysts were characterized using the powder X-ray diffraction, high resolution transmission electron microscopy, scanning electron microscopy, UV–visible diffuse reflectance spectra, and N2 adsorption–desorption (Brunauer–Emmett–Teller) techniques respectively. The photodegradation performances of UiO-66/BiOI photocatalysts were evaluated by photodegrading salicylic acid under visible-light irradiation. The UiO-66/BiOI composites displayed much higher photocatalytic efficiencies than pure BiOI under visible light. When the content of UiO-66 was 5.2 wt%, the composite (UiO-66/BiOI-2) has the best photocatalytic activity. Most of the salicylic acid molecules can be degraded in 100 min. The degradation rate of UiO-66/BiOI-2 samples is higher than single BiOI and UiO-66. The enhanced photocatalytic performance of UiO-66/BiOI may be ascribed to the formation of p–n heterojunctions between BiOI and UiO-66, which facilitates the transfer and separation of the photogenerated charge carriers. After recycling of the photocatalyst for five times for the photodegradation of salicylic acid, more than 85% of salicylic acid could still be degraded in the fifth cycle, implying that the as-prepared photocatalysts are highly stable.

SbVO4-TiO2 Cation Deficient Photocatalyst: Synthesis and Photocatalytic Investigation

2013 ◽  
Vol 702 ◽  
pp. 51-55
Author(s):  
Rahmatollah Rahimi ◽  
Masoumeh Mahjoub Moghaddas ◽  
Solmaz Zargari
Keyword(s):  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Vanadium Oxide ◽  
Visible Light Irradiation ◽  
Sol Gel ◽  
Photocatalytic Efficiency ◽  
Visible Light Driven ◽  
Ft Ir ◽  
First Time

For the first time antimony vanadium oxide-TiO2(SbV-T) nanocomposite was synthesized via sol-gel method to improve the photocatalytic efficiency of TiO2. The samples were characterized by FT-IR, XRD, SEM, EDX, and DRS. To investigate the photocatalytic activity of the samples, the photodegradation of methyl orange was carried out under visible light irradiation with pure TiO2, SbVO4, and SbVO4-TiO2nanocomposite. The SbV-T photocatalyst exhibited higher visible light driven photocatalytic efficiency to degrade MO dye. Furthermore the effect of SbVO4 and cationic vacancies in the photocatalytic activity of the SbV-T sample are described.

GeH: a novel material as a visible-light driven photocatalyst for hydrogen evolution

2014 ◽  
Vol 50 (75) ◽  
pp. 11046-11048 ◽  
Author(s):  
Zhenhua Liu ◽  
Zaizhu Lou ◽  
Zhujie Li ◽  
Gang Wang ◽  
Zeyan Wang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrogen Evolution ◽  
Water Splitting ◽  
Layered Structure ◽  
Organic Contaminants ◽  
Visible Light Driven ◽  
Novel Material ◽  
First Time

A novel photocatalyst (GeH), with 2D layered structure, was found for the first time to exhibit photocatalytic activity in the hydrogen evolution of water splitting and decomposition of organic contaminants under irradiation of visible light.

scholarly journals Visible Light-Driven Photocatalytic Activity of Magnetic Recoverable Ternary ZnFe2O4/rGO/g-C3N4 Nanocomposites

2020 ◽  
Vol 67 (4) ◽  
pp. 1082-1091
Author(s):  
Martin Tsvetkov ◽  
Elzhana Encheva ◽  
Albin Pintar ◽  
Maria Milanova
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Diffuse Reflectance Spectroscopy ◽  
Weight Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Visible Light Driven ◽  
Physicochemical Methods ◽  
Green Model ◽  
Adsorption Desorption

ZnFe2O4/rGO/g-C3N4 ternary nanocomposite photocatalysts with different ZnFe2O4/g-C3N4 weight ratio (0.5, 0.75, 1) were prepared by a stepwise solvothermal method using ethylene glycol as the solvent. Physicochemical methods such as X-ray diffraction, UV-Vis diffuse reflectance spectroscopy and photoluminescence spectroscopy were applied in order to characterize the composites. The formation of a meso-/macroporous structure with specific surface area between 67 and 77 m2 g–1 was confirmed by N2 adsorption/desorption. The bandgap of the composites was found to be lower (2.30 eV) than that of g-C3N4 (2.7 eV). In contrast to pure g-C3N4, the composites showed no fluorescence, i.e. no recombination of e–/h+ took place. All samples, including pure g-C3N4 and ZnFe2O4, were tested for adsorption and photocatalytic degradation of aqueous malachite green model solutions (10–5 M) under visible light irradiation (λ > 400 nm). The results show that the prepared nanocomposites have higher absorption and photocatalytic activity than the pristine g-C3N4 and ZnFe2O4 and can be successfully used for water purification from organic azo-dyes.

scholarly journals Rodlike AgI/Ag2Mo2O7 Heterojunctions with Enhanced Visible-Light-Driven Photocatalytic Activity

ACS Omega ◽  
2019 ◽  
Vol 4 (5) ◽  
pp. 7919-7930 ◽  
Author(s):  
Zhongyi Jiao ◽  
Zhendong Liu ◽  
Zhen Ma
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Driven
Sign in / Sign up

Export Citation Format

Share Document