scholarly journals A sustainable preparation of catalytically active and antibacterial cellulose metal nanocomposites via ball milling of cellulose

2020 ◽  
Vol 22 (2) ◽  
pp. 455-464 ◽  
Author(s):  
Joanna Kwiczak-Yiğitbaşı ◽  
Özge Laçin ◽  
Mine Demir ◽  
Recep Erdem Ahan ◽  
Urartu Özgür Şafak Şeker ◽  
...  
Keyword(s):  
Ball Milling ◽  
Reducing Agents ◽  
Active Materials ◽  
Catalytically Active ◽  
Metal Nanocomposites

Mechanochemical production of cellulose–metal NP composites requires no capping or reducing agents, and yields antibacterial and catalytically active materials.

scholarly journals Sonochemical Preparation of Polymer-Metal Nanocomposites with Catalytic and Plasmonic Properties

2021 ◽  
Author(s):  
Jing Wan ◽  
Bo Fan ◽  
San Thang
Keyword(s):  
Reducing Agents ◽  
Wide Range ◽  
Polymer Metal ◽  
Metal Nanocomposites

Polymer-metal nanocomposites are of increasing interest for a wide range of applications; however, the preparation of these nanocomposites often requires the addition of external initiation and reducing agents for the...

scholarly journals Formation of Cu2O Solid Solution via High-Frequency Electromagnetic Field-Assisted Ball Milling: The Reaction Mechanism

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 618 ◽  
Author(s):  
Yingzhe Zhang ◽  
Yudao Chen ◽  
Juan Li ◽  
Wei Li ◽  
Ding Chen ◽  
...  
Keyword(s):  
Solid Solution ◽  
Electromagnetic Field ◽  
Ball Milling ◽  
High Frequency ◽  
Environmental Water ◽  
Phenol Red ◽  
Degradation Of Dyes ◽  
Catalytically Active ◽  
High Frequency Electromagnetic Field ◽  
Aqueous Conditions

The contamination of environmental water with organic pollutants poses significant challenges for society, and much effort has been directed toward the development of catalysts and methods that can decompose these pollutants. While effort has been directed toward the fabrication of Cu2O catalysts by ball milling, this technique can involve long preparation times and provide low yields. In this study, we synthesized a solid solution of Cu2O in 22 h by high-frequency electric-field-assisted ball milling below 40 °C in only one step under aqueous conditions. We investigated the catalytic activities of the produced Cu2O solid solution in the microwave-assisted degradation of dyes, namely rhodamine B, phenol red and methyl orange. The prepared Cu2O solid solution was very catalytically active and completely degraded the above-mentioned dyes within 2 min. The one-dimensional diffusion model and the phase boundary (planar) model were found to describe the kinetics well. Synergism between ball milling and the high-frequency electromagnetic field plays a key role in the preparation of Cu2O solid solution nanoparticles. Ball milling facilitates the relaxation of the Cu2O lattice and high-frequency electromagnetic radiation accelerates the diffusion of Fe atoms into the Cu2O crystal along the (111) crystal plane, quickly leading to the formation of a Cu2O solid solution.

Synthesis of CeO2/SnO2 catalytically active materials using film-forming solution

2013 ◽  
Vol 49 (7) ◽  
pp. 681-684 ◽  
Author(s):  
O. S. Khalipova ◽  
S. A. Kuznetsova ◽  
S. I. Galanov ◽  
V. V. Kozik
Keyword(s):  
Active Materials ◽  
Film Forming ◽  
Catalytically Active

Controlling the Structure of Arenedisulfonates toward Catalytically Active Materials

2009 ◽  
Vol 21 (4) ◽  
pp. 655-661 ◽  
Author(s):  
Felipe Gándara ◽  
Enrique Gutiérrez Puebla ◽  
Marta Iglesias ◽  
Davide M. Proserpio ◽  
Natalia Snejko ◽  
...  
Keyword(s):  
Active Materials ◽  
Catalytically Active

Application of Foam Glass Based on Glass Scrap and Plant Ash and Slag for the Preparation of Catalytically Active Materials

2020 ◽  
Vol 56 (7) ◽  
pp. 765-769
Author(s):  
N. P. Shabel’skaya ◽  
E. A. Yatsenko ◽  
R. P. Medvedev ◽  
B. M. Gol’tsman ◽  
E. V. Vasil’eva ◽  
...  
Keyword(s):  
Foam Glass ◽  
Active Materials ◽  
Catalytically Active ◽  
Plant Ash ◽  
Glass Scrap

scholarly journals Exploring Microemulsion-Prepared Lanthanum Catalysts for Natural Gas Valorisation

2019 ◽  
Vol 63 (4) ◽  
pp. 265-276
Author(s):  
Cristina Estruch Bosch ◽  
Stephen Poulston ◽  
Paul Collier ◽  
Joris W. Thybaut ◽  
Guy B. Marin
Keyword(s):  
Thermal Treatment ◽  
Crystallite Size ◽  
Synthesis Method ◽  
Oxidative Coupling Of Methane ◽  
X Ray Diffraction ◽  
Active Materials ◽  
Catalytically Active ◽  
Microemulsion Synthesis ◽  
Reproducible Manner

Microemulsions were used to develop a catalyst with high selectivity towards ethylene and ethane while maintaining considerable methane (CH4) conversion. The use of this technique to produce lanthanum nanoparticles was studied under different conditions. Temperature was shown to have the most significant effect on the final material properties providing a minimum crystallite size at 25°C. The morphology observed for all the samples was flake or needle like materials containing nanocrystallites. To obtain the catalytically active materials a thermal treatment was needed and this was studied using in situ X-ray diffraction (XRD). This analysis demonstrated that the materials exhibited significant changes in phase and crystallite size when submitted to thermal treatment and these were shown to be difficult to control, meaning that the microemulsion synthesis method is a challenging route to produce La nanoparticles in a reproducible manner. The materials were tested for oxidative coupling of methane (OCM) and no correlation could be observed between the ‘as synthesised’ crystallite size and activity. However, the presence of La carbonates in the materials produced was deemed to be crucial to ensure an adequate OCM activity.

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