Recent Progress in Microwave-Assisted Pyrometallurgy at Central South University

2021 ◽  
pp. 25-32
Author(s):  
Liancheng Wang ◽  
Zhiwei Peng ◽  
Jie Wang ◽  
Wenxing Shang ◽  
Qiang Zhong ◽  
...  
Keyword(s):  
Recent Progress ◽  
Microwave Assisted ◽  
Central South

A Recent Progress in Microwave-assisted Synthesis of Heterocyclic Compounds Containing Nitrogen, Sulphur and Oxygen

2019 ◽  
Vol 9 (4) ◽  
pp. 255-289 ◽  
Author(s):  
Chandravadivelu Gopi ◽  
Gudapati Krupamai ◽  
Magharla Dasaratha Dhanaraju
Keyword(s):  
Heterocyclic Compounds ◽  
Recent Progress ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted

Recent Progress in Microwave-assisted Modification of Vegetable Oils or Their Derivatives

2020 ◽  
Vol 24 (8) ◽  
pp. 870-884
Author(s):  
Jinshuai Zhang ◽  
Yun Hu ◽  
Fei Zhang ◽  
Jianyu Lu ◽  
Jia Huang ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Reaction Time ◽  
Free Fatty Acids ◽  
Vegetable Oils ◽  
Recent Progress ◽  
The Other ◽  
Side Reactions ◽  
Microwave Technology ◽  
Microwave Assisted ◽  
Recent Advances

Vegetable oils have been widely used in food, surfactants, lubricants, biodiesel, coatings, and other fields due to their advantages such as renewable, abundant, suitable for further processing, and biodegradable. On the other hand, microwave technology has attracted extensive attention in organic and polymeric chemistry because the technology can greatly shorten the reaction time, improve the yield of products, reduce side reactions, etc. This paper summarized recent advances on the microwave-assisted modification of vegetable oils or their derivatives, such as esterification of free fatty acids, transesterification of triglycerides, epoxidation, and polymerization.

scholarly journals Recent Progress of Microwave-Assisted Synthesis of Silica Materials

Nanomaterials ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 1092 ◽  
Author(s):  
Borja Díaz de Greñu ◽  
Ruth de los Reyes ◽  
Ana M. Costero ◽  
Pedro Amorós ◽  
Jose Vicente Ros-Lis
Keyword(s):  
Energy Source ◽  
Drug Release ◽  
Mesoporous Materials ◽  
Metallic Nanoparticles ◽  
Recent Progress ◽  
Gas Adsorption ◽  
Microwave Assisted Synthesis ◽  
Synthesis Conditions ◽  
Microwave Assisted ◽  
Silica Materials

Microwaves are a source of energy of great interest for chemical synthesis. Among nanomaterials, few are as versatile as silica—it forms mesoporous materials and nanoparticles, it can be incorporated as shells or loaded in composites, it can also be functionalized. Despite the relevant properties of silica, and the advantages of the use of microwave as energy source, its use in silica-based materials is not frequent. We report herein a compilation of the research results published in the last 10 years of microwave assisted synthesis of silica based materials. This review includes examples of mesoporous materials for waste removal, catalysis, drug release, and gas adsorption applications, together with examples based in the optimization of the synthesis conditions. In the case of non-porous materials, examples of analytical applications, coating of metallic nanoparticles, and SiOx-C materials have been collected.

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

The Nature of Oxide Surfaces: Topographic and Electronic Structure

1993 ◽  
Vol 51 ◽  
pp. 966-967
Author(s):  
Dawn A. Bonnell ◽  
Yong Liang
Keyword(s):  
Transition Metal Oxides ◽  
Electronic Structures ◽  
Recent Progress ◽  
Spatial Localization ◽  
Level Of Detail ◽  
Scanning Tunneling ◽  
Oxide Surfaces ◽  
Tunneling Microscopy ◽  
Considerable Effort ◽  
Complete Understanding

Recent progress in the application of scanning tunneling microscopy (STM) and tunneling spectroscopy (STS) to oxide surfaces has allowed issues of image formation mechanism and spatial resolution limitations to be addressed. As the STM analyses of oxide surfaces continues, it is becoming clear that the geometric and electronic structures of these surfaces are intrinsically complex. Since STM requires conductivity, the oxides in question are transition metal oxides that accommodate aliovalent dopants or nonstoichiometry to produce mobile carriers. To date, considerable effort has been directed toward probing the structures and reactivities of ZnO polar and nonpolar surfaces, TiO2 (110) and (001) surfaces and the SrTiO3 (001) surface, with a view towards integrating these results with the vast amount of previous surface analysis (LEED and photoemission) to build a more complete understanding of these surfaces. However, the spatial localization of the STM/STS provides a level of detail that leads to conclusions somewhat different from those made earlier.

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