Photocatalytic selective aerobic oxidation of amines to nitriles over Ru/γ-Al2O3: the role of the support surface and the strong imine intermediate adsorption

2020 ◽  
Vol 10 (2) ◽  
pp. 440-449 ◽  
Author(s):  
Pengqi Zhu ◽  
Jin Zhang ◽  
Jie Wang ◽  
Peng Kong ◽  
Yunwei Wang ◽  
...  
Keyword(s):  
High Selectivity ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Support Surface ◽  
Oh Groups ◽  
Selective Aerobic Oxidation

The abundant surface OH groups and electron-deficient Ru sites on Ru/γ-Al2O3 ensure the high selectivity to nitriles under light irradiation.

Spatial separation of dual-cocatalysts on bismuth vanadate for selective aerobic oxidation of benzylalcohols to benzaldehydes under visible light irradiation

2018 ◽  
Vol 8 (23) ◽  
pp. 6173-6179 ◽  
Author(s):  
Xu Jin ◽  
Rengui Li ◽  
Yue Zhao ◽  
Xiaodan Liu ◽  
Xiaoqi Wang ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Aerobic Oxidation ◽  
Spatial Separation ◽  
Bismuth Vanadate ◽  
Light Irradiation ◽  
Selective Aerobic Oxidation

Efficient converting of alcohols to aldehydes under visible light can be achieved on BiVO4 crystals with spatial separation of dual-cocatalysts.

Selective aerobic oxidation of para-xylene in sub- and supercritical water. Part 1. Comparison with ortho-xylene and the role of the catalyst

2011 ◽  
Vol 13 (9) ◽  
pp. 2389 ◽  
Author(s):  
Eduardo Pérez ◽  
Joan Fraga-Dubreuil ◽  
Eduardo García-Verdugo ◽  
Paul A. Hamley ◽  
W. Barry Thomas ◽  
...  
Keyword(s):  
Supercritical Water ◽  
Aerobic Oxidation ◽  
Para Xylene ◽  
Selective Aerobic Oxidation

scholarly journals Tertiary amine mediated aerobic oxidation of sulfides into sulfoxides by visible-light photoredox catalysis on TiO2

2015 ◽  
Vol 6 (8) ◽  
pp. 5000-5005 ◽  
Author(s):  
Xianjun Lang ◽  
Wei Hao ◽  
Wan Ru Leow ◽  
Shuzhou Li ◽  
Jincai Zhao ◽  
...  
Keyword(s):  
Visible Light ◽  
Tertiary Amine ◽  
Visible Light Irradiation ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Photoredox Catalysis ◽  
Synergistic Catalysis ◽  
Oxidation Of Sulfides ◽  
Selective Aerobic Oxidation

The selective aerobic oxidation of sulfides into sulfoxides on TiO2 under visible-light irradiation was accomplished through synergistic catalysis with triethylamine.

The highly selective aerobic oxidation of cyclohexane to cyclohexanone and cyclohexanol over V2O5@TiO2 under simulated solar light irradiation

2017 ◽  
Vol 19 (1) ◽  
pp. 311-318 ◽  
Author(s):  
Dexin Yang ◽  
Tianbin Wu ◽  
Chunjun Chen ◽  
Weiwei Guo ◽  
Huizhen Liu ◽  
...  
Keyword(s):  
Photocatalytic Oxidation ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Solar Light ◽  
Simulated Solar Light ◽  
Solar Light Irradiation ◽  
Selective Aerobic Oxidation

V2O5@TiO2 is very efficient for the photocatalytic oxidation of cyclohexane to cyclohexanone and cyclohexanol under simulated solar light irradiation.

Selective aerobic oxidation of alkyl aromatics on Bi2MoO6 nanoplates decorated with Pt nanoparticles under visible light irradiation

2018 ◽  
Vol 54 (86) ◽  
pp. 12194-12197 ◽  
Author(s):  
Bao Zhang ◽  
Xiaojing Yang ◽  
Jun Li ◽  
Gang Cheng
Keyword(s):  
Visible Light ◽  
Selective Oxidation ◽  
Visible Light Irradiation ◽  
Aerobic Oxidation ◽  
Pt Nanoparticles ◽  
Light Irradiation ◽  
Light Illumination ◽  
Visible Light Illumination ◽  
Selective Aerobic Oxidation

Pt/Bi2MoO6 nanoplates are efficient photocatalysts for the selective oxidation of saturated C–H bonds in alkyl aromatics under visible light illumination using O2 as an oxidant.

Selective aerobic oxidation of sulfides to sulfoxides in water under blue light irradiation over Bi4O5Br2

2020 ◽  
Vol 22 (15) ◽  
pp. 4884-4889 ◽  
Author(s):  
Wei Zhao ◽  
Chunxia Yang ◽  
Jindi Huang ◽  
Xiaoli Jin ◽  
Yu Deng ◽  
...  
Keyword(s):  
Blue Light ◽  
Catalytic System ◽  
Aerobic Oxidation ◽  
Light Irradiation ◽  
Oxidation Of Sulfides ◽  
Selective Aerobic Oxidation

A green and practical catalytic system promoted by blue light for oxidation of sulfides to sulfoxides was successfully developed.

scholarly journals Recent Advances in Fabrication of Non-Isocyanate Polyurethane-Based Composite Materials

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3497
Author(s):  
Piotr Stachak ◽  
Izabela Łukaszewska ◽  
Edyta Hebda ◽  
Krzysztof Pielichowski
Keyword(s):  
Raw Materials ◽  
Synthesis Method ◽  
Polymeric Materials ◽  
Original Research ◽  
Significant Group ◽  
Oh Groups ◽  
New Class ◽  
Hazardous Chemical ◽  
Wide Range

Polyurethanes (PUs) are a significant group of polymeric materials that, due to their outstanding mechanical, chemical, and physical properties, are used in a wide range of applications. Conventionally, PUs are obtained in polyaddition reactions between diisocyanates and polyols. Due to the toxicity of isocyanate raw materials and their synthesis method utilizing phosgene, new cleaner synthetic routes for polyurethanes without using isocyanates have attracted increasing attention in recent years. Among different attempts to replace the conventional process, polyaddition of cyclic carbonates (CCs) and polyfunctional amines seems to be the most promising way to obtain non-isocyanate polyurethanes (NIPUs) or, more precisely, polyhydroxyurethanes (PHUs), while primary and secondary –OH groups are being formed alongside urethane linkages. Such an approach eliminates hazardous chemical compounds from the synthesis and leads to the fabrication of polymeric materials with unique and tunable properties. The main advantages include better chemical, mechanical, and thermal resistance, and the process itself is invulnerable to moisture, which is an essential technological feature. NIPUs can be modified via copolymerization or used as matrices to fabricate polymer composites with different additives, similar to their conventional counterparts. Hence, non-isocyanate polyurethanes are a new class of environmentally friendly polymeric materials. Many papers on the matter above have been published, including both original research and extensive reviews. However, they do not provide collected information on NIPU composites fabrication and processing. Hence, this review describes the latest progress in non-isocyanate polyurethane synthesis, modification, and finally processing. While focusing primarily on the carbonate/amine route, methods of obtaining NIPU are described, and their properties are presented. Ways of incorporating various compounds into NIPU matrices are characterized by the role of PHU materials in copolymeric materials or as an additive. Finally, diverse processing methods of non-isocyanate polyurethanes are presented, including electrospinning or 3D printing.

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