Ag3PO4 nanoparticle decorated on SiO2 spheres for efficient visible light photocatalysis

2015 ◽  
Vol 39 (12) ◽  
pp. 9242-9248 ◽  
Author(s):  
Manu Sharma ◽  
Kasinath Ojha ◽  
Aparna Ganguly ◽  
Ashok K. Ganguli
Keyword(s):  
Visible Light ◽  
Reactive Species ◽  
Light Irradiation ◽  
Visible Light Photocatalysis ◽  
Sio2 Spheres

Light irradiation on Ag3PO4 decorated SiO2 generates three reactive species (˙OH, O2−˙, and hole) leading to efficient photocatalysis.

scholarly journals Degenerative xanthate transfer to olefins under visible-light photocatalysis

2018 ◽  
Vol 14 ◽  
pp. 3047-3058 ◽  
Author(s):  
Atsushi Kaga ◽  
Xiangyang Wu ◽  
Joel Yi Jie Lim ◽  
Hirohito Hayashi ◽  
Yunpeng Lu ◽  
...  
Keyword(s):  
Visible Light ◽  
Triplet State ◽  
Light Irradiation ◽  
Visible Light Photocatalysis ◽  
Chain Mechanism ◽  
Radical Chain ◽  
Blue Led ◽  
Led Light ◽  
Radical Chain Mechanism ◽  
Photophysical Studies

The degenerative transfer of xanthates to olefins is enabled by the iridium-based photocatalyst [Ir{dF(CF3)ppy}2(dtbbpy)](PF6) under blue LED light irradiation. Detailed mechanistic investigations through kinetics and photophysical studies revealed that the process operates under a radical chain mechanism, which is initiated through triplet-sensitization of xanthates by the long-lived triplet state of the iridium-based photocatalyst.

Direct C–H difluoromethylenephosphonation of arenes and heteroarenes with bromodifluoromethyl phosphonate via visible-light photocatalysis

2014 ◽  
Vol 50 (100) ◽  
pp. 15916-15919 ◽  
Author(s):  
Lin Wang ◽  
Xiao-Jing Wei ◽  
Wen-Long Lei ◽  
Han Chen ◽  
Li-Zhu Wu ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Visible Light Photocatalysis ◽  
Aromatic Rings

Direct C–H difluoromethylenephosphonation of arenes and heteroarenes with bromodifluoromethyl phosphonate under visible-light irradiation is achieved through addition of phosphonodifluoromethyl (PDFM) radicals to aromatic rings.

scholarly journals Visible-Light Reductive Cyclization of Nonactivated Alkyl Chlorides

Synlett ◽  
2019 ◽  
Vol 30 (13) ◽  
pp. 1496-1507
Author(s):  
Miguel Claros ◽  
Alicia Casitas ◽  
Julio Lloret-Fillol
Keyword(s):  
Visible Light ◽  
Vitamin B12 ◽  
Catalytic System ◽  
Catalyst Design ◽  
Light Irradiation ◽  
Reductive Cyclization ◽  
Visible Light Photocatalysis ◽  
Reduction Potentials ◽  
Organic Halides ◽  
Chemical Inertness

Nonactivated alkyl chlorides are readily available and bench-stable feedstocks; however, they exhibit an inherent chemical inertness, in part, due to their large negative reduction potentials, which have precluded their widespread use as radical precursors in visible-light photocatalysis. Herein, we highlight some recent strategies for activating challenging organic halides under light irradiation, with special emphasis in C(sp3)–halide bonds. In this line, a brief summary of the reactivity of Vitamin B12, F430 cofactor and derivatives is required to comprehend the chemistry behind our developed Cu/M (M = Co, Ni) dual catalytic system. Catalyst design has been key for developing a mild and general photoredox methodology for the intramolecular reductive cyclization of nonactivated alkyl chlorides with tethered alkenes. The cleavage of strong C(sp3)–Cl bonds is mediated by a highly nucleophilic low-valent cobalt or nickel intermediate generated by visible-light photoredox reduction employing a copper photosensitizer.

scholarly journals Titanium dioxide visible light photocatalysis: surface association enables photocatalysis with visible light irradiation

2017 ◽  
Vol 53 (31) ◽  
pp. 4335-4338 ◽  
Author(s):  
Spencer P. Pitre ◽  
Tehshik P. Yoon ◽  
Juan C. Scaiano
Keyword(s):  
Titanium Dioxide ◽  
Visible Light ◽  
Titanium Oxide ◽  
Uv Irradiation ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Visible Light Photocatalysis

While titanium oxide (TiO2) photocatalysis is typically enabled by UV irradiation, association of indole to the TiO2 surface was found to enable photocatalysis with visible light irradiation.

Tricomponent brookite/anatase TiO2/g-C3N4 heterojunction in mesoporous hollow microspheres for enhanced visible-light photocatalysis

2018 ◽  
Vol 6 (16) ◽  
pp. 7236-7245 ◽  
Author(s):  
Hao Wei ◽  
William A. McMaster ◽  
Jeannie Z. Y. Tan ◽  
Dehong Chen ◽  
Rachel A. Caruso
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Anatase Tio2 ◽  
Hollow Microspheres ◽  
Light Irradiation ◽  
Visible Light Photocatalysis

Improving photocatalytic performance under visible light irradiation by using multicomponent heterojunctions.

scholarly journals Fabrication of Ag2O/WO3 p–n heterojunction composite thin films by magnetron sputtering for visible light photocatalysis

RSC Advances ◽  
2020 ◽  
Vol 10 (27) ◽  
pp. 16187-16195 ◽  
Author(s):  
Young Woong Jo ◽  
Chadrasekhar Loka ◽  
Kee-Sun Lee ◽  
Jae-Hyun Lim
Keyword(s):  
Thin Films ◽  
Magnetron Sputtering ◽  
Visible Light ◽  
Environmental Remediation ◽  
Light Irradiation ◽  
Solar Light ◽  
Visible Light Photocatalysis ◽  
Composite Thin Films ◽  
Solar Light Irradiation ◽  
Catalytically Active

Semiconductor-based nanostructures which are photo-catalytically active upon solar light irradiation were extensively used for environmental remediation due to the potential decomposition of various kinds of pollutants.

scholarly journals Plasmon enhanced visible light photocatalysis for TiO2 supported Pd nanoparticles

Nanoscale ◽  
2015 ◽  
Vol 7 (29) ◽  
pp. 12331-12335 ◽  
Author(s):  
A. M. Lacerda ◽  
I. Larrosa ◽  
S. Dunn
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
Pd Nanoparticles ◽  
Light Irradiation ◽  
Visible Light Photocatalysis ◽  
Plasmonic Effect ◽  
Solar Light Irradiation ◽  
Rhodamine B Dye ◽  
Effect Of Pd ◽  
Supported Pd

Fast rhodamine b dye photodegradation due to plasmonic effect of Pd supported on TiO2 under solar light irradiation.

Synthesis of Bi2O3–Bi4V2O11 heterojunctions with high interface quality for enhanced visible light photocatalysis in degradation of high-concentration phenol and MO dyes

CrystEngComm ◽  
2018 ◽  
Vol 20 (18) ◽  
pp. 2553-2561 ◽  
Author(s):  
Ting Liu ◽  
Yan Ge Mao ◽  
Yin Peng
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Visible Light Photocatalysis ◽  
High Concentration ◽  
Interface Quality

Bi2O3–Bi4V2O11 heterostructures with high interface quality were synthesized by calcining Bi2VO5.5–Bi(OHC2O4)·2H2O precursors. The Bi2O3–Bi4V2O11 heterostructure exhibits outstanding photocatalytic activity for degrading phenol and MO dyes with high concentration under visible light irradiation.

Cu Doped TiO2: Visible Light Assisted Photocatalytic Antimicrobial Activity and High Temperature Anatase Stability

2018 ◽  
Author(s):  
Snehamol Mathew ◽  
Priyanka Ganguly ◽  
Stephen Rhatigan ◽  
Vignesh Kumaravel ◽  
Ciara Byrne ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Density Functional ◽  
Anatase Phase ◽  
Sol Gel ◽  
Chemical Properties ◽  
Light Irradiation ◽  
Health Concern ◽  
Bacterial Inactivation ◽  
X Ray

Indoor surface contamination by microbes is a major public health concern. A damp environment is one potential sources for microbe proliferation. Smart photocatalytic coatings on building surfaces using semiconductors like titania (TiO<sub>2</sub>) can effectively curb this growing threat.<b> </b>Metal-doped titania in anatase phase has been proved as a promising candidate for energy and environmental applications. In this present work, the antimicrobial efficacy of copper (Cu) doped TiO<sub>2 </sub>(Cu-TiO<sub>2</sub>) was evaluated against <i>Escherichia coli</i> (Gram-negative) and <i>Staphylococcus aureus</i> (Gram-positive) under visible light irradiation. Doping of a minute fraction of Cu (0.5 mol %) in TiO<sub>2 </sub>was carried out <i>via</i> sol-gel technique. Cu-TiO<sub>2</sub> further calcined at various temperatures (in the range of 500 °C – 700 °C) to evaluate the thermal stability of TiO<sub>2</sub> anatase phase. The physico-chemical properties of the samples were characterised through X-ray diffraction (XRD), Raman spectroscopy, X-ray photo-electron spectroscopy (XPS) and UV-visible spectroscopy techniques. XRD results revealed that the anatase phase of TiO<sub>2</sub> was maintained well, up to 650 °C, by the Cu dopant. UV-DRS results suggested that the visible light absorption property of Cu-TiO<sub>2 </sub>was enhanced and the band gap is reduced to 2.8 eV. Density functional theory (DFT) studies emphasises the introduction of Cu<sup>+</sup> and Cu<sup>2+</sup> ions by replacing Ti<sup>4+</sup> ions in the TiO<sub>2</sub> lattice, creating oxygen vacancies. These further promoted the photocatalytic efficiency. A significantly high bacterial inactivation (99.9%) was attained in 30 mins of visible light irradiation by Cu-TiO<sub>2</sub>.

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