Shaaker Hajati

Bio: Shaaker Hajati is an academic researcher from Yasouj University. The author has contributed to research in topics: Adsorption & Langmuir adsorption model. The author has an hindex of 42, co-authored 100 publications receiving 5016 citations. Previous affiliations of Shaaker Hajati include Sharif University of Technology & University of Southern Denmark.

Facile Synthesis of Mixed Metal-Organic Frameworks: Electrode Materials for Supercapacitors with Excellent Areal Capacitance and Operational Stability.

Abstract: Electrode materials with high surface area, tailored pore size, and efficient capability for ion insertion and enhanced transport of electrons and ions are needed for advanced supercapacitors. In the present study, a mixed metal–organic framework (MOF) (cobalt- and manganese-based MOF) was synthesized through a simple one-pot solvothermal method and employed as the electrode material for the supercapacitor. Notably, a Co–Mn MOF electrode displayed a large surface area and excellent cycling stability (over 95% capacitance retention after 1500 cycles). Also, superior pseudocapacitive behavior was observed for the Co–Mn MOF electrode in the KOH electrolyte with an exceptional areal capacitance of 1.318 F cm–2. Moreover, an asymmetric supercapacitor was assembled using Co–Mn MOF and activated carbon electrode as positive and negative electrodes, respectively. The fabricated supercapacitor showed a specific capacitance of 106.7 F g–1 at a scan rate of 10 mV s–1 and delivered a maximum energy density of 30 W h ...

Applications of 2D MXenes in energy conversion and storage systems

Abstract: Transition metal carbides and nitrides (MXenes), a family of two-dimensional (2D) inorganic compounds, are materials composed of a few atomic layers of transition metal carbides, nitrides, or carbonitrides. Ti3C2, the first 2D layered MXene, was isolated in 2011. This material, which is a layered bulk material analogous to graphite, was derived from its 3D phase, Ti3AlC2 MAX. Since then, material scientists have either determined or predicted the stable phases of >200 different MXenes based on combinations of various transition metals such as Ti, Mo, V, Cr, and their alloys with C and N. Extensive experimental and theoretical studies have shown their exciting potential for energy conversion and electrochemical storage. To this end, we comprehensively summarize the current advances in MXene research. We begin by reviewing the structure types and morphologies and their fabrication routes. The review then discusses the mechanical, electrical, optical, and electrochemical properties of MXenes. The focus then turns to their exciting potential in energy storage and conversion. Energy storage applications include electrodes in rechargeable lithium- and sodium-ion batteries, lithium-sulfur batteries, and supercapacitors. In terms of energy conversion, photocatalytic fuel production, such as hydrogen evolution from water splitting, and carbon dioxide reduction are presented. The potential of MXenes for the photocatalytic degradation of organic pollutants in water, such as dye waste, is also addressed, along with their promise as catalysts for ammonium synthesis from nitrogen. Finally, their application potential is summarized.

The cancer cell

Abstract: These investigations and several others that have beenpublishedwithin recentyears compel us us to hold the view that the ratio of the vital capacity to the body length, trunk length, chest circumference,surfacearea or weight or any combination of thesemeasurements, is too variable to admit of any workable standardor normal value. On the other hand the vital capacity of each individual, after he had becomeaccustomedto the use of the spirometer,will be found to be subjectto but small variations as long as good health is maintained. Thereseems to beevidenceto show that a reductionin the vital capacityis ofen the first sign of a progressivedamageto the respiratorytissue.

From fundamentals to applications: a toolbox for robust and multifunctional MOF materials.

Abstract: In recent years, metal-organic frameworks (MOFs) have been regarded as one of the most important classes of materials The combination of various metal clusters and ligands, arranged in a vast array of geometries has led to an ever-expanding MOF family Each year, new and novel MOF structures are discovered The structural diversity present in MOFs has significantly expanded the application of these new materials MOFs show great potential for a variety of applications, including but not limited to: gas storage and separation, catalysis, biomedicine delivery, and chemical sensing This review intends to offer a short summary of some of the most important topics and recent development in MOFs The scope of this review shall cover the fundamental aspects concerning the design and synthesis of MOFs and range to the practical applications regarding their stability and derivative structures Emerging trends of MOF development will also be discussed These trends shall include multicomponent MOFs, defect development in MOFs, and MOF composites The ever important structure-property-application relationship for MOFs will also be investigated Overall, this review provides insight into both existing structures and emerging aspects of MOFs