Photodegradation of cyprodinil under UV-visible irradiation - chemical and toxicological approaches

2016 ◽  
Vol 30 (19) ◽  
pp. 2201-2211 ◽  
Author(s):  
Edith Nicol ◽  
Houda Chayata ◽  
Christophe Genty ◽  
Stéphane Bouchonnet ◽  
Sophie Bourcier
Keyword(s):  
Visible Irradiation ◽  
Uv Visible

Synthesis and properties of a sterically encumbered poly(thienylene vinylene): poly[E-1,2-(4,4prime-dihexyl-2,2prime-dithienyl)ethylene]

1998 ◽  
Vol 76 (11) ◽  
pp. 1524-1529
Author(s):  
Jimmy Lowe ◽  
Carl Bartels ◽  
Steven Holdcroft
Keyword(s):  
Ftir Spectroscopy ◽  
Electrically Conducting ◽  
H Nmr ◽  
Visible Photoluminescence ◽  
Micron Size ◽  
Visible Irradiation ◽  
Uv Visible ◽  
The Stability ◽  
Doped Polymer ◽  
Polythiophene Derivative

Electrically conducting poly[E-1,2-(4,4prime-dihexyl-2,2prime-dithienyl)ethylene] was synthesized and structurally characterized by UV-visible, 1H NMR, and FTIR spectroscopy. The head-to-head arrangement of the alkylthiophene dyads directly affects the UV-visible, photoluminescence, and electroluminescence maxima of the polymer. The conductivity of the doped polymer was measured to be ~2 S cm-1 and the stability of the oxidized polymer possessing various dopants was compared. UV-visible irradiation of PDHDTE rendered the films insoluble and photolithography was used to produce micron-size images. FTIR was used to monitor the photoproducts during photolysis of PDHDTE. Mechanisms of photooxidation were proposed, based on the photoproducts observed.Key words: polythiophene derivative, head-to-head dyad, photolithography, photooxidation, electroluminescence.

Designing Soft Reactive Adhesives by Controlling Polymer Chemistry

MRS Bulletin ◽  
2003 ◽  
Vol 28 (6) ◽  
pp. 424-427 ◽  
Author(s):  
Agnès Aymonier ◽  
Eric Papon
Keyword(s):  
Automotive Industry ◽  
Ease Of Use ◽  
Large Strains ◽  
Structural Adhesives ◽  
Wide Range ◽  
Step Growth ◽  
Visible Irradiation ◽  
Step Growth Polymerization ◽  
Uv Visible ◽  
Activation Heat

AbstractSoft reactive adhesives (SRAs) are polymer-based materials (e.g., polyurethanes, polysiloxanes, polydienes) designed to be further vulcanized or slightly cross-linked through external activation (heat, moisture, oxygen, UV–visible irradiation, etc.), either at the time of their application or within a subsequent predefined period. They are used mainly as mastics, or sealing compounds, in a wide range of industrial and commercial fields such as construction, footwear, and the automotive industry. Generally deposited as thick films, SRAs behave as structural adhesives; their low elastic moduli accommodate large strains between the bonded parts without incurring permanent damage. Other outstanding attributes of SRAs are their resistance to solvents, their ability to withstand aggressive environments, and their ease of use. This article discusses examples of SRAs and, more specifically, shows how the cross-linking chemistry, mainly through step-growth polymerization, provides their primary advantages.

scholarly journals Synthesis and Photoactivity of Fe3O4/TiO2-Co as a Magnetically Separable Visible Light Responsive Photocatalyst

2018 ◽  
Vol 18 (3) ◽  
pp. 403 ◽  
Author(s):  
Eko Sri Kunarti ◽  
Indriana Kartini ◽  
Akhmad Syoufian ◽  
Karolina Martha Widyandari
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Dopant Concentration ◽  
Band Gap Energy ◽  
Methylene Blue Solution ◽  
Magnetic Photocatalyst ◽  
Blue Solution ◽  
Degradation Reaction ◽  
Visible Irradiation ◽  
Uv Visible

Synthesis of magnetic photocatalyst, Fe3O4/TiO2-Co, with characterization and photoactivity examination have been conducted. The synthesis was initiated by preparation of Fe3O4 particles using coprecipitation method. The Fe3O4 particles were then coated with TiO2-Co at a various ratio of Fe3O4:TiO2 and concentration of Co(II) dopant. The Fe3O4/TiO2-Co was characterized by FTIR, XRD, TEM, SEM-EDX, VSM, and SR UV-visible methods. Photoactivity of the Fe3O4/TiO2-Co was carried out using methylene blue as a target molecule in degradation reaction within a batch system. By using optimum conditions, the degradation of methylene blue solution was performed under exposure to UV, visible light and dark condition. Results showed that the Fe3O4/TiO2-Co formation was confirmed by the presence of Fe3O4 and anatase diffraction peaks in the X-ray diffractogram. SR UV-Vis spectra indicated that the Fe3O4/TiO2-Co was responsive to visible light. Band gap energy of the Fe3O4/TiO2-Co with dopant concentration of 1; 5; 10 and 15% were 3.22; 3.12; 3.09 and 2.81 eV, respectively. The methylene blue solution can be well photodegraded at a pH of 10 for 210 min. The Fe3O4/TiO2-Co has the highest ability to methylene blue photodegradation with dopant concentration of 10% gave degradation yield of 80.51 and 95.38% under UV and visible irradiation, respectively.

Titanium dioxide/carbon nitride nanosheet nanocomposites for gas phase CO2 photoreduction under UV-visible irradiation

2019 ◽  
Vol 242 ◽  
pp. 369-378 ◽  
Author(s):  
Angus Crake ◽  
Konstantinos C. Christoforidis ◽  
Robert Godin ◽  
Benjamin Moss ◽  
Andreas Kafizas ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Gas Phase ◽  
Carbon Nitride ◽  
Co2 Photoreduction ◽  
Visible Irradiation ◽  
Uv Visible

scholarly journals Photocatalytic Activity of ZnO-Biochar Hybrid Composites

2014 ◽  
Vol 16 (4) ◽  
Author(s):  
J. Matos ◽  
R. Montaña ◽  
E. Rivero ◽  
J. Velasco ◽  
G. Ledezma
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Hybrid Composites ◽  
Scaling Up ◽  
Surface Groups ◽  
Synergy Effect ◽  
First Order ◽  
Visible Irradiation ◽  
Uv Visible ◽  
The Difference

<span>Photodegradation of methylene blue (MB) was studied on ZnO in presence of home-made biochars </span><span>prepared by different methods. MB photodegradation was performed under UV-visible irradiation to verify </span><span>the scaling-up of ZnO-AC hybrid materials. It was verified that oxygenated surface groups on carbon were </span><span>photochemically active in the photodegradation of MB and a synergy effect between both solids has been </span><span>estimated from the first-order apparent rate-constants. This effect enhances the photoactivity of ZnO up to </span><span>a factor about 2.5 and the difference in photoactivity in the binary materials was associated to the surface </span><span>properties of AC.</span>

scholarly journals Photocatalytic Simultaneous Removal of Nitrite and Ammonia via a Zinc Ferrite/Activated Carbon Hybrid Catalyst under UV–Visible Irradiation

ACS Omega ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 6411-6420 ◽  
Author(s):  
Jia Ye ◽  
Shou-Qing Liu ◽  
Wen-Xiao Liu ◽  
Ze-Da Meng ◽  
Li Luo ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Zinc Ferrite ◽  
Simultaneous Removal ◽  
Hybrid Catalyst ◽  
Visible Irradiation ◽  
Uv Visible

Self-Z-scheme plasmonic tungsten oxide nanowires for boosting ethanol dehydrogenation under UV-visible light irradiation

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 12774-12780 ◽  
Author(s):  
Changhai Lu ◽  
Juan Li ◽  
Guanying Chen ◽  
Baojun Li ◽  
Zaizhu Lou
Keyword(s):  
Visible Light ◽  
Tungsten Oxide ◽  
Visible Light Irradiation ◽  
Synergetic Effect ◽  
Light Irradiation ◽  
Oxide Nanowires ◽  
Ethanol Dehydrogenation ◽  
Visible Irradiation ◽  
Uv Visible

Plasmonic WO3−x with self-Z-scheme structure leads to a synergetic effect of combined UV and visible irradiation to boost ethanol dehydrogenation for aldehyde generation.

Effects of uv-visible irradiation of rabbit cornea in the presence of chlorpromazine

1987 ◽  
Vol 6 (4) ◽  
pp. 345-355 ◽  
Author(s):  
I. Aravind Menon ◽  
K. Basu Prasanta ◽  
M. Hasany Syed ◽  
D. Persad Suruj
Keyword(s):  
Rabbit Cornea ◽  
Visible Irradiation ◽  
Uv Visible

Photocatalytic Degradation of Organic Reactive Dyes over MnTiO3/TiO2Heterojunction Composites Under UV-Visible Irradiation

2013 ◽  
Vol 89 (5) ◽  
pp. 1047-1056 ◽  
Author(s):  
Santhanam Sivakumar ◽  
Ayyasamy Selvaraj ◽  
Anaipalayam Kandasamy Ramasamy
Keyword(s):  
Photocatalytic Degradation ◽  
Reactive Dyes ◽  
Visible Irradiation ◽  
Uv Visible
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