Results 21 to 30 of about 18,231,952 (248)

Iodine-catalyzed diazo activation to access radical reactivity

Nature Communications, 2018
Radical reactivity of diazo compounds, useful organic building blocks, is yet underexplored. Here, the authors report an iodine-catalyzed radical activation of diazo compounds affording a variety of substituted cyclopropanes, pyrroles and epoxides under ...
Pan Li, Jingjing Zhao, Lijun Shi, Jin Wang, Xiaodong Shi, Fuwei Li   +5 more
doaj   +1 more source

Effect of doping TiO2 with alkaline-earth metal ions on its photocatalytic activity [PDF]

Journal of the Serbian Chemical Society, 2007
TiO2 photocatalysts doped with alkaline-earth metal ions were prepared by the impregnation and coprecipitation methods. The sample were characterized by XRD, XPS and IR spectroscopy.
Li Yuexiang, Peng Shaoqin, Jiang Fengyi, Lu Gongxuan, Li Shuben   +4 more
doaj   +1 more source

Polyoxometalate-Based Catalysts for CO₂ Conversion

Molecules, 2019
Polyoxometalates (POMs) are a diverse class of anionic metal-oxo clusters with intriguing chemical and physical properties. Owing to unrivaled versatility and structural variation, POMs have been extensively utilized for catalysis for a plethora of ...
Yanwei Cao, Qiongyao Chen, Chaoren Shen, Lin He   +3 more
doaj   +1 more source

Impact of Physico-Chemical Properties of Cellulose Nanocrystal/Silver Nanoparticle Hybrid Suspensions on Their Biocidal and Toxicological Effects

Nanomaterials, 2021
There is a demand for nanoparticles that are environmentally acceptable, but simultaneously efficient and low cost. We prepared silver nanoparticles (AgNPs) grafted on a native bio-based substrate (cellulose nanocrystals, CNCs) with high biocidal ...
Dafne Musino, Julie Devcic, Cécile Lelong, Sylvie Luche, Camille Rivard, Bastien Dalzon, Gautier Landrot, Thierry Rabilloud, Isabelle Capron   +8 more
doaj   +1 more source

Oxidation kinetics of a Ni-Cu based cermet at high temperature [PDF]

, 2013
The oxidation kinetics of a cermet composed of Ni–Cu alloy and nickel ferrite was studied by thermogravimetry at 960 °C under oxygen in the range 0.5–77 kPa. After an initial mass increase up to 15 g/m2 due to oxidation of surface metallic particles, the
Palau, Patrice, Abildskov, Jens, Thomsen, Kaj, Herri, Jean-Michel, Chamelot, Pierre, von Solms, Nicolas, Honvault, Christophe, Peres, Véronique, Bouvet, Sylvie, Cassayre, Laurent, Herslund, Peter Jørgensen, Kwaterski, Matthias, Galfré, Aurélie, Brântuas, Pedro, Pijolat, Michèle   +14 more
core   +1 more source

Graphitic phosphorus coordinated single Fe atoms for hydrogenative transformations

Nature Communications, 2020
Phosphorus ligands have been extensively used in metal complexes for homogeneous catalysis. Here, the authors broaden this scope to heterogeneous catalysis by preparing a P-coordinated Fe single atom catalyst with excellent catalytic performance in ...
Xiangdong Long, Zelong Li, Guang Gao, Peng Sun, Jia Wang, Bingsen Zhang, Jun Zhong, Zheng Jiang, Fuwei Li   +8 more
doaj   +1 more source

Thermal oxidation kinetics of additive free polyamide 6-6 [PDF]

, 2013
Thermal aging of an additive free PA 6-6 has been elucidated at 90, 100, 120, 140, 150 and 160 C in airventiled ovens by Fourier transform infrared spectrophotometry, viscosimetry in molten state and uniaxial tensile testing.
BEN HASSINE, Mouna, COLIN, Xavier, EL MAZRY, Chaker, CORREC, Olivier   +3 more
core   +1 more source

Co-oxidation kinetic model for the thermal oxidation of polyethylene-unsaturated substrate systems [PDF]

, 2013
The thermal oxidation of polyethylene (PE) impregnated by the methyl esters of unsaturated fatty acids (UFEs) was studied using chemiluminescence, and infra-red spectrophotometry.
RYCHLÝ, Jozef, VERDU, Jacques, FAYOLLE, Bruno, RICHAUD, Emmanuel   +3 more
core   +1 more source

Synthesis of a molecularly defined single-active site heterogeneous catalyst for selective oxidation of N-heterocycles

Nature Communications, 2018
Synthesis of molecularly defined single-active site catalytic materials is the key to bridging the gap between homogeneous and heterogeneous catalysis.
Yujing Zhang, Shaofeng Pang, Zhihong Wei, Haijun Jiao, Xingchao Dai, Hongli Wang, Feng Shi   +6 more
doaj   +1 more source

Theoretical investigations of oxygen vacancy effects in nickel-doped zirconia from ab initio XANES spectroscopy at the oxygen K-edge

Beilstein Journal of Nanotechnology, 2022
In this study, we present theoretical X-ray absorption near-edge structure (XANES) spectra at the K-edge of oxygen in zirconia containing Ni dopant atoms and O vacancies at varying concentrations.
Dick Hartmann Douma, Lodvert Tchibota Poaty, Alessio Lamperti, Stéphane Kenmoe, Abdulrafiu Tunde Raji, Alberto Debernardi, Bernard M’Passi-Mabiala   +6 more
doaj   +1 more source