Sustainable Hydrothermal and Solvothermal Synthetic Approaches for Advanced Carbon Materials in Multidimensional Applications: A Review

2021 ◽  
Author(s):  
Lwazi Ndlwana ◽  
Naledi Raleie ◽  
Mogolodi Dimpe ◽  
Hezron Ogutu ◽  
Mxolisi M Motsa ◽  
...  
Keyword(s):  
Significant Contribution ◽  
Carbon Materials ◽  
Low Cost ◽  
Graphene Quantum Dots ◽  
Synthetic Methods ◽  
Direct Result ◽  
Synthesis Methods ◽  
Oxide Supports ◽  
Synthetic Approaches ◽  
Fabrication Costs

There is great importance and need of improving existing carbon materials fabrication methods. As such, this work proposes to discuss, interrogate, and propose viable hydrothermal, solvothermal, and other advanced carbon materials synthetic methods. The advanced carbon materials to be interrogated will include the synthesis of carbon dots, carbon nanotubes, nitrogen/titania-doped carbons, graphene quantum dots, and their nanocomposites with solid/polymeric/metal oxide supports. This will be done with special mind to microwave-assisted solvothermal and hydrothermal synthesis due to their favourable properties such as rapidity, low cost, and green/environmentally-friendliness. Thus, these methods are important during the current and future synthesis and modification of advanced carbon materials for application in energy, gas separation, sensing, and water treatment. Simultaneously, the work will pay special cognizance to methods reducing the fabrication costs and environmental impact while enhancing the properties as a direct result of the synthesis methods. As a direct result, the expectation is to impart a significant contribution to the scientific body of work regarding the improvement of the said fabrication methods.

scholarly journals Sustainable Hydrothermal and Solvothermal Synthesis of Advanced Carbon Materials in Multidimensional Applications: A Review

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5094
Author(s):  
Lwazi Ndlwana ◽  
Naledi Raleie ◽  
Kgogobi M. Dimpe ◽  
Hezron F. Ogutu ◽  
Ekemena O. Oseghe ◽  
...  
Keyword(s):  
Significant Contribution ◽  
Carbon Materials ◽  
Low Cost ◽  
Graphene Quantum Dots ◽  
Green Technology ◽  
Direct Result ◽  
Synthesis Methods ◽  
Materials Synthesis ◽  
Oxide Supports ◽  
Fabrication Costs

The adoption of green technology is very important to protect the environment and thus there is a need for improving the existing methods for the fabrication of carbon materials. As such, this work proposes to discuss, interrogate, and propose viable hydrothermal, solvothermal, and other advanced carbon materials synthesis methods. The synthesis approaches for advanced carbon materials to be interrogated will include the synthesis of carbon dots, carbon nanotubes, nitrogen/titania-doped carbons, graphene quantum dots, and their nanocomposites with solid/polymeric/metal oxide supports. This will be performed with a particular focus on microwave-assisted solvothermal and hydrothermal synthesis due to their favourable properties such as rapidity, low cost, and being green/environmentally friendly. These methods are regarded as important for the current and future synthesis and modification of advanced carbon materials for application in energy, gas separation, sensing, and water treatment. Simultaneously, the work will take cognisance of methods reducing the fabrication costs and environmental impact while enhancing the properties as a direct result of the synthesis methods. As a direct result, the expectation is to impart a significant contribution to the scientific body of work regarding the improvement of the said fabrication methods.

Diversity-Oriented Synthetic Approaches for Furoindoline: A Review

2019 ◽  
Vol 16 (3) ◽  
pp. 342-368 ◽  
Author(s):  
Ramandeep Kaur ◽  
Yagyesh Kapoor ◽  
Sundeep K. Manjal ◽  
Ravindra K. Rawal ◽  
Kapil Kumar
Keyword(s):  
Rheumatoid Arthritis ◽  
Cancer Cachexia ◽  
Biological Activities ◽  
Ring System ◽  
Synthetic Methods ◽  
Structural Units ◽  
Current Article ◽  
Tetrahydropyranyl Ether ◽  
Synthetic Approaches ◽  
Synthetic Target

The furo [2,3-b] indoline ring system is one of the most important structural units in various natural products. It has been known to have inherent biological activities and is utilized as a synthetic target for a number of natural compounds; therefore, this has contributed to a great demand for the growth of synthetic methods for this ring system. Most important compounds with furoindoline ring system are physovenine, madindoline A and B and makomotindoline etc. These compounds are well known to exhibit biological activity against different diseases such as glaucoma, cancer, cachexia, Castleman’s disease, rheumatoid arthritis, etc. The current article focuses on various synthetic approaches for furoindoline containing compounds and essential furoindoline moiety, such as oxindole-5-O-tetrahydropyranyl ether route etc., and various other diastereoand enantio- controlled approach in a very concise way.

scholarly journals Fabrication, Characterization and In Vitro Cytotoxicity of Mesoporous β-Tricalcium Phosphate Using the Spray Drying Method

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 252
Author(s):  
Henni Setia Ningsih ◽  
Leonhard Tannesia ◽  
Hsiang-Ho Chen ◽  
Shao-Ju Shih
Keyword(s):  
Spray Drying ◽  
Tricalcium Phosphate ◽  
Low Cost ◽  
In Vitro Cytotoxicity ◽  
Formation Mechanisms ◽  
Synthesis Methods ◽  
Average Pore ◽  
Calcination Temperatures ◽  
Future Demands

Mesoporous beta tricalcium phosphate (β-TCP) has recently attracted significant interest as an artificial bone tissue in orthopedics. However, a scalable process is required to meet future demands. Spray drying is one of the potential synthesis methods owing to its low cost and scalable production. In this study, various mesoporous β-TCP powders were calcined in the range of 800 to 1100 °C, with particle sizes ranging from ~0.3 to ~1.8 μm, specific surface areas from ~16 to ~64 m2/g, and average pore sizes of 3 nm. Except for the 800 °C calcined powder, the other β-TCP powders (calcination temperatures of 900, 1000, and 1100 °C) exhibited no cytotoxicity. These results indicate that spray-dried mesoporous β-TCP powders were obtained. Finally, the corresponding formation mechanisms are discussed.

scholarly journals Self-assembly of TiO2/ZIF-8 nanocomposites for varied photocatalytic CO2 reduction with H2O vapor induced by different synthetic methods

2021 ◽  
Author(s):  
Yan-Hong Zou ◽  
Hai-Ning Wang ◽  
Xing Meng ◽  
Hong-Xu Sun ◽  
Zi-Yan Zhou
Keyword(s):  
Self Assembly ◽  
Co2 Reduction ◽  
Synthetic Methods ◽  
Photocatalytic Performances ◽  
Synthetic Approaches

Different synthetic approaches give birth to different structures, which result in varied photocatalytic performances.

scholarly journals Functionalized Carbon Materials for Electronic Devices: A Review

Micromachines ◽  
2019 ◽  
Vol 10 (4) ◽  
pp. 234 ◽  
Author(s):  
Urooj Kamran ◽  
Young-Jung Heo ◽  
Ji Won Lee ◽  
Soo-Jin Park
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Materials ◽  
Electronic Devices ◽  
Pressure Sensors ◽  
Future Generation ◽  
High Specific Surface Area ◽  
Synthetic Methods ◽  
Energy Storage Devices ◽  
Self Powered ◽  
Walled Carbon Nanotubes

Carbon-based materials, including graphene, single walled carbon nanotubes (SWCNTs), and multi walled carbon nanotubes (MWCNTs), are very promising materials for developing future-generation electronic devices. Their efficient physical, chemical, and electrical properties, such as high conductivity, efficient thermal and electrochemical stability, and high specific surface area, enable them to fulfill the requirements of modern electronic industries. In this review article, we discuss the synthetic methods of different functionalized carbon materials based on graphene oxide (GO), SWCNTs, MWCNTs, carbon fibers (CFs), and activated carbon (AC). Furthermore, we highlight the recent developments and applications of functionalized carbon materials in energy storage devices (supercapacitors), inkjet printing appliances, self-powered automatic sensing devices (biosensors, gas sensors, pressure sensors), and stretchable/flexible wearable electronic devices.

Chemical Diversity of Volatile Macrocylic Lactones from Frogs

Synlett ◽  
2021 ◽  
Author(s):  
Stefan Schulz ◽  
Dennis Poth ◽  
Pardha Saradhi Peram ◽  
Susann Hötling ◽  
Markus Menke ◽  
...  
Keyword(s):  
Biosynthetic Pathway ◽  
Chemical Diversity ◽  
Synthetic Methods ◽  
Epoxide Opening ◽  
Scientific Approach ◽  
Long Time ◽  
Fatty Acid Biosynthetic Pathway ◽  
Unsaturated Lactones ◽  
Male Specific ◽  
Synthetic Approaches

AbstractFor a long time, frogs were believed to communicate primarily via the acoustic channel, but during the last decades it became obvious that various lineages also use chemical communication. In this Account we present our research on the identification of volatile lactones from Madagascan Mantellidae and African Hyperoliidae frogs. Both possess male specific glands that can disseminate a range of volatile compounds. Key constituents are macrocyclic lactones. They show high variability in structure and occurrence. We focus here on the synthetic approaches we have used to clarify constitution and configuration of the glandular compounds. Key synthetic methods are ring-closing metathesis and nucleophilic epoxide opening. Often, but not always, the natural compounds occurs in amounts that excludes their investigation by NMR spectroscopy. Instead, we use GC/MS analysis, GC/IR, microreactions, and synthesis to identify such components. Several aspects of our work will be described giving some insight in our scientific approach.1 Introduction2 Macrocylic Lactones from the Fatty Acid Biosynthetic Pathway3 Unsaturated Lactones4 Terpenoid Lactones5 Macrolide Occurrence6 Conclusions

scholarly journals Highly efficient electrocatalysts with CoO/CoFe2O4 composites embedded within N-doped porous carbon materials prepared by hard-template method for oxygen reduction reaction

RSC Advances ◽  
2017 ◽  
Vol 7 (89) ◽  
pp. 56375-56381 ◽  
Author(s):  
Xinxin Jin ◽  
Yu Jiang ◽  
Qi Hu ◽  
Shaohua Zhang ◽  
Qike Jiang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Alkaline Solution ◽  
Porous Carbon ◽  
Carbon Materials ◽  
Low Cost ◽  
Reduction Reaction ◽  
Template Method ◽  
Hard Template ◽  
Hard Template Method

Low-cost dual transition metal (Fe and Co) based non-noble metal electrocatalysts (NNMEs) with large surface area and porous structure boost oxygen reduction reaction (ORR) performance in alkaline solution.

Sēra dioksīda fizikāli ķīmisko īpašību pielietojums jaunu organiskās sintēzes metožu izstrādē / Development of New Organic Synthesis Methods Based on Physico-Chemical Properties of Sulfur Dioxide

2021 ◽  
Author(s):  
◽  
Krista Gulbe
Keyword(s):  
Organic Synthesis ◽  
Chemical Properties ◽  
Coupling Reaction ◽  
Synthetic Methods ◽  
Synthesis Methods ◽  
Chemical Transformations ◽  
Scientific Publications ◽  
Cross Coupling Reaction ◽  
Aryl Acetylenes ◽  
The Republic

The Doctoral Thesis has been prepared as a collection of thematically related scientific publications comprising five publications in the SCI journals, one patent of the Republic of Latvia, and one application for patent of the Republic of Latvia. We have carried out fundamental research on the applications of SO2 as a solvent and reagent in organic synthesis. We have developed several novel synthetic methods that represent the use of liquid SO2 as a solvent for chemical transformations that proceed via carbenium ion intermediates: a) hydration of aryl acetylenes; b) hydrohalogenation of aryl acetylenes; c) ring opening of methylenecyclopropanes with halides; d) glycosylation with glycosyl fluorides. By employing DABSO as an SO2 surrogate, we have also discovered the catalytic activity of Ru(II) complexes towards sulfonylative cross coupling reaction. This finding has been applied for the synthesis of sulfonyl derived compounds.

Synthesis, Characterization, Applications, and Toxicity of Green Synthesized Nanoparticles

2021 ◽  
Vol 22 ◽  
Author(s):  
João Marcos Pereira Galúcio ◽  
Sorrel Godinho Barbosa de Souza ◽  
Arthur Abinader Vasconcelos ◽  
Alan Kelbis Oliveira Lima ◽  
Kauê Santana da Costa ◽  
...  
Keyword(s):  
Green Synthesis ◽  
Low Cost ◽  
Chemical Properties ◽  
Analytical Techniques ◽  
Industrial Applications ◽  
Synthesis Methods ◽  
Methods Of Synthesis ◽  
Food Applications ◽  
Living Organisms ◽  
Harmful Effects

: Nanotechnology is a cutting-edge area with numerous industrial applications. Nanoparticles are structures that have dimensions ranging from 1–100 nm which exhibit significantly different mechanical, optical, electrical, and chemical properties when compared with their larger counterparts. Synthetic routes that use natural sources, such as plant extracts, honey, and microorganisms are environmentally friendly and low-cost methods that can be used to obtain nanoparticles. These methods of synthesis generate products that are more stable and less toxic than those obtained using conventional methods. Nanoparticles formed by titanium dioxide, zinc oxide, silver, gold, and copper, as well as cellulose nanocrystals are among the nanostructures obtained by green synthesis that have shown interesting applications in several technological industries. Several analytical techniques have also been used to analyze the size, morphology, hydrodynamics, diameter, and chemical functional groups involved in the stabilization of the nanoparticles as well as to quantify and evaluate their formation. Despite their pharmaceutical, biotechnological, cosmetic, and food applications, studies have detected their harmful effects on human health and the environment; and thus, caution must be taken in uses involving living organisms. The present review aims to present an overview of the applications, the structural properties, and the green synthesis methods that are used to obtain nanoparticles, and special attention is given to those obtained from metal ions. The review also presents the analytical methods used to analyze, quantify, and characterize these nanostructures.

An Update on the Synthesis and Applications of Bis(Naphthoquinones): An Important Class of Molecules against Infectious Diseases and Other Conditions

2021 ◽  
Vol 21 ◽  
Author(s):  
Luana da S. M. Forezi ◽  
Acácio S. de Souza ◽  
Carolina G. S. Lima ◽  
Amanda A. Borges ◽  
Patricia G. Ferreira ◽  
...  
Keyword(s):  
Infectious Diseases ◽  
General Class ◽  
Biological Activities ◽  
Pharmaceutical Market ◽  
Synthetic Methods ◽  
Important Class ◽  
Biological Targets ◽  
Valuable Compounds ◽  
Synthetic Approaches

: Naphthoquinones are important molecules belonging to the general class of quinones, and many of these compounds have become drugs that are in the pharmaceutical market for the treatment of several diseases. A special subclass of compounds is that of the bis(naphthoquinones), which have two linked naphthoquinone units. In the last few years, several synthetic approaches toward such valuable compounds have been described, as well as their evaluation against numerous important biological targets. In this review, we provide a thorough discussion on the various synthetic methods reported for the synthesis of bis(naphthoquinone) analogues, also highlighting the biological activities of these substances.

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