Photocatalytic asymmetric epoxidation of trans-stilbene with manganese–porphyrin/graphene-oxide nanocomposite and molecular oxygen: axial ligand effect

2020 ◽  
Vol 10 (10) ◽  
pp. 3290-3302 ◽  
Author(s):  
Elahe Ahadi ◽  
Hassan Hosseini-Monfared ◽  
Alex Spieß ◽  
Christoph Janiak
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Molecular Oxygen ◽  
Axial Ligand ◽  
Asymmetric Epoxidation ◽  
Manganese Porphyrin ◽  
Ligand Effect ◽  
Mild Conditions ◽  
Trans Stilbene ◽  
Visible Light Driven

An efficient, visible light-driven manganese–porphyrin photocatalyst was developed for the asymmetric epoxidation of trans-stilbene by molecular oxygen under mild conditions.

scholarly journals Photocatalytic Synthesis of Tetra-Substituted Furans Promoted by Carbon Dioxide

2021 ◽  
Author(s):  
Ya-Ming Tian ◽  
Huaiju Wang ◽  
Ritu Ritu ◽  
Burkhard Koenig
Keyword(s):  
Carbon Dioxide ◽  
Transition Metal ◽  
Visible Light ◽  
Metal Free ◽  
Mild Conditions ◽  
Simple Protocol ◽  
Visible Light Driven ◽  
Substituted Furans ◽  
Photocatalytic Synthesis

We report a simple protocol for the transition metal-free, visible-light-driven conversion of 1,3-diketones to tetra-substituted furan skeleton compounds in carbon dioxide (CO2) atmosphere under mild conditions. It was found that...

scholarly journals Photocatalytic and adsorption property of ZnS–TiO2/RGO ternary composites for methylene blue degradation

2018 ◽  
Vol 37 (9-10) ◽  
pp. 764-776 ◽  
Author(s):  
YL Qin ◽  
WW Zhao ◽  
Z Sun ◽  
XY Liu ◽  
GL Shi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Visible Light ◽  
Adsorption Property ◽  
Light Irradiation ◽  
Tetrabutyl Titanate ◽  
Thermal Method ◽  
Photocatalytic Effect ◽  
Dioxide Powder ◽  
Visible Light Driven

The visible light–driven ZnS–TiO2/RGO nanocomposites, with good visible light–driven photocatalytic activity, utilizing graphene oxide as precursor, were successfully synthesized via a facile solvothermal thermal method with graphene oxide as precursor. Ti4+ ions were derived from titanium dioxide powder (TiO2, P25) and tetrabutyl titanate. S2− ions and Zn2+ ions were provided by sodium sulfide and zinc acetate, respectively. The photocatalytic and absorbance activity of the nanocomposites was investigated through the photocatalytic degradation of methylene blue in aqueous solution. The results showed that the ZnS–TiO2/RGO nanocomposite prepared by tetrabutyl titanate exhibited better photocatalytic and adsorbance activity for methylene blue under visible light irradiation and its photocatalytic efficiency reached 90% in 60-min light irradiation, almost 1.5 times that of the synthesized ZnS–TiO2/RGO by P25, which was attributed to a cooperative reaction because of an increase of photo-absorption effect of graphene sheets and photocatalytic effect of ZnS nanoparticles. The adsorbance activity for ZnS–TiO2/RGO–tetrabutyl titanate) reached 48%, which was almost 1.7 times higher than that of ZnS–TiO2/RGO-P25 and almost 3.7 times higher than that of ZnS/RGO.

Red mud modified with graphene oxide for enhanced visible-light-driven photocatalytic performance towards the degradation of antibiotics

2019 ◽  
Vol 43 (48) ◽  
pp. 19172-19179
Author(s):  
Hong-ji Ren ◽  
Yu-bin Tang ◽  
Wei-long Shi ◽  
Fang-yan Chen ◽  
Yu-song Xu
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Visible Light ◽  
Red Mud ◽  
Photocatalytic Performance ◽  
Oxide Composite ◽  
Composite Photocatalysts ◽  
Visible Light Driven ◽  
Mixing Method

The red mud/graphene oxide composite photocatalysts with enhanced photocatalytic activity were prepared through a simple ultrasonic mixing method.

Visible light driven photodegradation of quinoline over TiO2/graphene oxide nanocomposites

2014 ◽  
Vol 316 ◽  
pp. 174-181 ◽  
Author(s):  
Jieying Jing ◽  
Yang Zhang ◽  
Wenying Li ◽  
William W. Yu
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Visible Light Driven
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