scholarly journals Chemistry of magnetic covalent organic frameworks (MagCOFs): From synthesis to separation applications

2022 ◽  
Author(s):  
Priya Yadav ◽  
Manavi Yadav ◽  
Rashmi Gaur ◽  
Radhika Gupta ◽  
Gunjan Arora ◽  
...  
Keyword(s):  
Cost Effective ◽  
High Porosity ◽  
Covalent Organic Frameworks ◽  
New Class ◽  
Effective Synthesis

Magnetic covalent organic frameworks (MagCOFs) represent a new class of emerging material, primarily employed in separation applications. Due to their attractive properties such as easy and cost-effective synthesis, high porosity,...

2D MOFs have unique features for biological applications. They can be utilized for gene therapy, bioimaging, biosensing, photodynamic therapy, and tissue engineering

2021 ◽  
Author(s):  
Moataz Dowaidar
Keyword(s):  
Tissue Engineering ◽  
Photodynamic Therapy ◽  
Material Selection ◽  
Cost Effective ◽  
High Porosity ◽  
Biological Applications ◽  
Defect Sites ◽  
Cell Monitoring ◽  
Effective Synthesis ◽  
Design And Manufacture

2D MOFs provide unique properties for use in biological applications, including huge surfaces, programmable functionality and high porosity. This work highlighted the benefits of MOFs for numerous biological applications, including medicinal administration, bioimaging, biosensing, photodynamic therapy, and tissue engineering. The increased surface area of 2D MOFs allows for increased therapeutic agent loading, while the smaller size of 2D MOFs enables increased tumor cell absorption of these complexes due to increased permeability and retention. Also, exterior surfaces of MOFs may be modified to allow fluorophores to be conjugated to them, allowing live cell monitoring of MOFs. Together with its tunability, the high porosity of 2D MOFs can be used for biomolecule sensing. 2D MOFs have also recently been shown to be promising photosensitizers with the potential for photodynamic cancer treatment. In addition, 2D MOFs may be printed with biocompatible binders to form scaffolds for use in tissue engineering applications.Despite the various benefits 2D MOFs give as complex materials with delicate functional characteristics, a few unsolved concerns remain about how to accelerate the development of 2D MOFs for biomedical applications. Differentiating between bulk MOFs and 2D MOFs requires special characterization approaches. This will help define the structure of 2D MOFs and better understand their defect sites, allowing for more effective synthesis strategies.2D MOFs' structural flexibility may be strengthened by using computational and sophisticated features to increase our knowledge of 2D MOFs' crystallography. Scaling up the fabrication of mechanically stable 2D MOFs using cost-effective synthesis while managing MOF size, shape, and porosity is very critical and warrants further consideration in future study. To boost device-based applications, in-situ and in-operando research as well as 2D MOFs' endurance properties are advised. This would facilitate design and manufacture of 2D MOFs with controllable particle sizes, which are particularly useful in optical and photothermal applications. To ensure optimal use of MOFs in biosensing and biomimetic applications, the barriers of ultrathin 2D MOFs must be overcome. 2D MOF aggregation and accompanying instability now also hinder its use in biological applications. This requires processing approaches to boost MOF stability. After developing 2D MOF synthesis procedures, extensive toxicological and biocompatibility research is needed to help translate 2D MOFs. With careful input material selection, including biocompatible metals and effective non-toxic linker materials, current challenges may be handled. Addressing these challenges might also help enhance the design and manufacture of MOFs, which might accelerate clinical translation of 2D MOFs.

Cost Effective Synthesis and Fabrication of Phase-Pure Kesterite Cu2-xZn1.3SnS4 P-type Absorber Layer Thin Films by Solvent Based Process Technique for Photovoltaic Solar Energy Applications

2018 ◽  
Vol 7 (4) ◽  
pp. 36
Author(s):  
B. Khadambari ◽  
S. S. Bhattacharya
Keyword(s):  
Solar Energy ◽  
Renewable Energy Sources ◽  
Cost Effective ◽  
Absorber Layer ◽  
Window Layer ◽  
Energy Applications ◽  
Process Technique ◽  
Absorber Material ◽  
Effective Synthesis ◽  
P Type

Solar has become one of the fastest growing renewable energy sources. With the push towards sustainability it is an excellent solution to resolve the issue of our diminishing finite resources. Alternative photovoltaic systems are of much importance to utilize solar energy efficiently. The Cu-chalcopyrite compounds CuInS2 and CuInSe2 and their alloys provide absorber material of high absorption coefficients of the order of 105 cm-1. Cu2ZnSnS4 (CZTS) is more promising material for photovoltaic applications as Zn and Sn are abundant materials of earth’s crust. Further, the preparation of CZTS-ink facilitates the production of flexible solar cells. The device can be designed with Al doped ZnO as the front contact, n-type window layer (e.g. intrinsic ZnO); an n-type thin film buffer layer (e.g. CdS) and a p-type CZTS absorber layer with Molybdenum (Mo) substrate as back contact. In this study, CZTS films were synthesized by a non-vaccum solvent based process technique from a molecular-ink using a non toxic eco-friendly solvent dimethyl sulfoxide (DMSO). The deposited CZTS films were optimized and characterized by XRD, UV-visible spectroscopy and SEM.

scholarly journals A Novel Method for the Preparation of Fibrous CeO2–ZrO2–Y2O3 Compacts for Thermochemical Cycles

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 885
Author(s):  
Nicole Knoblauch ◽  
Peter Mechnich
Keyword(s):  
Large Scale ◽  
Preparation Method ◽  
Cost Effective ◽  
High Porosity ◽  
Thermochemical Cycles ◽  
Redox Cycles ◽  
Redox Kinetics ◽  
Direct Infiltration ◽  
Novel Method ◽  
Functional Components

Zirconium-Yttrium-co-doped ceria (Ce0.85Zr0.13Y0.02O1.99) compacts consisting of fibers with diameters in the range of 8–10 µm have been successfully prepared by direct infiltration of commercial YSZ fibers with a cerium oxide matrix and subsequent sintering. The resulting chemically homogeneous fiber-compacts are sinter-resistant up to 1923 K and retain a high porosity of around 58 vol% and a permeability of 1.6–3.3 × 10−10 m² at a pressure gradient of 100–500 kPa. The fiber-compacts show a high potential for the application in thermochemical redox cycling due its fast redox kinetics. The first evaluation of redox kinetics shows that the relaxation time of oxidation is five times faster than that of dense samples of the same composition. The improved gas exchange due to the high porosity also allows higher reduction rates, which enable higher hydrogen yields in thermochemical water-splitting redox cycles. The presented cost-effective fiber-compact preparation method is considered very promising for manufacturing large-scale functional components for solar-thermal high-temperature reactors.

scholarly journals Derivation of Luminescent Mesoporous Silicon Nanocrystals from Biomass Rice Husks by Facile Magnesiothermic Reduction

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 613
Author(s):  
Sankar Sekar ◽  
Sejoon Lee
Keyword(s):  
Brown Rice ◽  
Total Pore Volume ◽  
Cost Effective ◽  
High Porosity ◽  
Magnesiothermic Reduction ◽  
Rice Husks ◽  
Average Pore ◽  
Efficient Catalyst ◽  
Mesoporous Silicon ◽  
Si Nanocrystals

High-quality silicon (Si) nanocrystals that simultaneously had superior mesoporous and luminescent characteristics were derived from sticky, red, and brown rice husks via the facile and cost-effective magnesiothermic reduction method. The Si nanocrystals were confirmed to comprise an aggregated morphology with spherical nanocrystals (e.g., average sizes of 15–50 nm). Due to the surface functional groups formed at the nanocrystalline Si surfaces, the Si nanocrystals clearly exhibited multiple luminescence peaks in visible-wavelength regions (i.e., blue, green, and yellow light). Among the synthesized Si nanocrystals, additionally, the brown rice husk (BRH)-derived Si nanocrystals showed to have a strong UV absorption and a high porosity (i.e., large specific surface area: 265.6 m2/g, small average pore diameter: 1.91 nm, and large total pore volume: 0.5389 cm3/g). These are indicative of the excellent optical and textural characteristics of the BRH-derived Si nanocrystals, compared to previously reported biomass-derived Si nanocrystals. The results suggest that the biomass BRH-derived Si nanocrystals hold great potential as an active source material for optoelectronic devices as well as a highly efficient catalyst or photocatalyst for energy conversion devices.

scholarly journals Fast and Cost-Effective Synthesis of High-Quality Graphene on Copper Foils Using High-Current Arc Evaporation

Materials ◽  
2018 ◽  
Vol 11 (5) ◽  
pp. 804 ◽  
Author(s):  
Helge Lux ◽  
Matthias Edling ◽  
Peter Siemroth ◽  
Sigurd Schrader
Keyword(s):  
Cost Effective ◽  
High Current ◽  
High Quality ◽  
Copper Foils ◽  
Effective Synthesis ◽  
Arc Evaporation

Cost-effective synthesis and solution processing of porous polymer networks through methanesulfonic acid-mediated aldol triple condensation

2018 ◽  
Vol 2 (2) ◽  
pp. 396-401 ◽  
Author(s):  
Zi-Hao Guo ◽  
Chenxu Wang ◽  
Qiang Zhang ◽  
Sai Che ◽  
Hong-Cai Zhou ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Methanesulfonic Acid ◽  
Cost Effective ◽  
Porous Polymer ◽  
Solution Processing ◽  
Condensation Method ◽  
Highly Efficient ◽  
Effective Synthesis ◽  
Scalable Synthesis

A highly efficient aldol triple condensation method was developed for scalable synthesis and solution processing of conjugated porous polymer networks.

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