Double diffusion effect on the bio-convective magnetized flow of tangent hyperbolic liquid by a stretched nano-material with Arrhenius Catalysts

Case Studies in Thermal Engineering, Journal Year: 2023, Volume and Issue: 44, P. 102838 - 102838

Published: Feb. 23, 2023

The idea of activation energy appearing in a chemical reaction has been widely applied to the production biodiesel, hydrogen, oil storage, geothermal manufacturing, base liquid mechanics, emulsified, food significant renewable source, as well sewage systems. This study aims investigate resultant repercussions double diffusion, energy, Brownian motion, thermal radiation, thermophoresis, viscous dissipation, magnetic field, and Joule heating on bioconvection tangent hyperbolic nanofluid flow over vertical stretching porous surface containing microbe (gyrotactic microorganisms). fluid transport equations are converted into ordinary differential using appropriate self-similarity variables after being solved finite difference method. impacts key parameters fluid's properties depicted graphs tables. When dimensionless is higher, mass transfer rate at stretched nanomaterial sheet drops. concentration near minimizes by increasing porosity parameter value, but opposite behavior happens far from sheet.

Language: Английский

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Development of new 2-(Benzothiazol-2-ylimino)-2,3-dihydro-1H-imidazol-4-ol complexes as a robust catalysts for synthesis of thiazole 6-carbonitrile derivatives supported by DFT studies

Journal of Molecular Structure, Journal Year: 2023, Volume and Issue: 1292, P. 136188 - 136188

Published: July 11, 2023

Language: Английский

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Analysis of XGaO3 (X = Ba and Cs) cubic based perovskite materials for photocatalytic water splitting applications: a DFT study

Heliyon, Journal Year: 2023, Volume and Issue: 9(3), P. e14112 - e14112

Published: Feb. 26, 2023

Energy conversion has become an important technology for meeting energy production and consumption in the modern era. Water splitting solar cell technologies are projected to close gap between demand consumption. Therefore, XGaO3 (X = Ba Cs) compounds having characteristics i.e., electrical, optical, mechanical, structural depicted by using a density functional theory (DFT) based CASTEP software with ultrasoft pseudo-potential plane-wave Generalized Gradient Approximation Perdew Burke Ernzerhof exchange correlation (GGA-PBE). According findings, all of these have cubic "pm3m" structure space group 221. The CsGaO3 BaGaO3 direct indirect band gaps, respect electronic band-structure recreations. Density states like total (TDOS) partial (PDOS) commend extent localization electrons numerous bands. optical properties explored adjusting dispersion curve/relation theoretical dielectric function (DF) scale corresponding peaks. As result, materials could be used consume light visible zone via photo catalysis. combination can produce effective results, so remarkable potential application sensing water splitting.

Language: Английский

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Highly Stereodivergent Synthesis of Chiral C4-Ester-Quaternary Pyrrolidines: A Strategy for the Total Synthesis of Spirotryprostatin A

Organic Letters, Journal Year: 2023, Volume and Issue: 25(19), P. 3391 - 3396

Published: May 10, 2023

In this work, we disclose two sets of highly diastereo- and enantioselective [3 + 2] cycloadditions iminoesters with various α-substituted acrylates, especially for sterically hindered weakly activated α-aryl or alkyl-substituted acrylates alkenal, alkynal, unstable aliphatic aldehyde-derived iminoesters, catalyzed by the AgHMDS/DTBM-Segphos Ag2O/CA-AA-Amidphos catalytic system, achieving stereodivergent synthesis chiral C4-ester-quaternary exo- endo-pyrrolidines high yields excellent enantioselectivities (up to >99:1 dr >99% ee). More importantly, gram-scale synthetic exo-adduct displays significant applications in aspect realizing total spirotryprostatin A alkaloid via nine steps a 36% overall yield.

Language: Английский

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Chitosan-supported metal nanocatalysts for the reduction of nitroaromatics

International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 239, P. 124135 - 124135

Published: March 23, 2023

Language: Английский

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Fabrication of polypyrrole gas sensor for detection of NH3 using an oxidizing agent and pyrrole combinations: Studies and characterizations

Heliyon, Journal Year: 2023, Volume and Issue: 9(7), P. e17611 - e17611

Published: June 25, 2023

The organic polymer known as Polypyrrole (Ppy) is synthesized when pyrrole monomers are polymerized. Excellent thermal stability, superior electrical conductivity, and environmental stability all characteristics of Polypyrrole. Chemical oxidative polymerization was used to synthesize Ppy using Ferric chloride (FeCl3) an oxidizing agent surfactant CTAB in aqueous solution. Oxidant varied different molar ratios (2, 3, 4 5). It found that increasing this ratio up increases PPy's conductivity. XRD, FTIR, SEM were characterize Ppy. conductive nature studied by I-V characteristics. best for the NH3 gas response.

Language: Английский

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MOFs as Versatile Catalysts: Synthesis Strategies and Applications in Value-Added Compound Production

ACS Omega, Journal Year: 2023, Volume and Issue: 8(35), P. 31600 - 31619

Published: Aug. 15, 2023

Catalysts played a crucial role in advancing modern human civilization, from ancient times to the industrial revolution. Due high cost and limited availability of traditional catalysts, there is need develop cost-effective, high-activity, nonprecious metal-based electrocatalysts. Metal-organic frameworks (MOFs) have emerged as an ideal candidate for heterogeneous catalysis due their physicochemical properties, hybrid inorganic/organic structures, uncoordinated metal sites, accessible organic sections. MOFs are nanoporous crystalline materials that can be used catalysts facilitate polymerization reactions. Their chemical structural diversity make them effective various reactions compared catalysts. been applied gas storage separation, ion-exchange, drug delivery, luminescence, sensing, nanofilters, water purification, catalysis. The review focuses on MOF-enabled value-added compound production, including alcohol oxidation, olefin oligomerization, offer tunable porosity, spatial density, single-crystal XRD control over catalyst properties. In this review, were focused CO2 fixation, reduction, photoelectrochemical splitting. Overall, great potential versatile diverse applications future.

Language: Английский

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4,6-Diamino-2-thiopyrimidine-based Cobalt Metal Organic Framework (Co-DAT‐MOF): green, efficient, novel and reusable nanocatalyst for synthesis of multicomponent reactions

Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)

Published: May 9, 2023

In this study, Co-DAT-MOF powder was prepared via the solvothermal method using 4, 6-diamino-2-thiopyrimidine as organic linker and Co(NO3)2·6H2O. The synthesized catalysts are characterized XRD, FT-IR, TGA, SEM, BET, NH3-TPD, ICP-OES techniques. SEM analysis clearly indicated formation of nanosheet microspheres. NH3-TPD-MS employed a means identifying various strengths acid sites their relative abundance in an attempt to explain effect catalyst surface sites. We identified new acidic feature catalyst, related presence desorption peaks NH3-TPD profiles. activity for synthesis multicomponent reactions correlates with lewis acidity. addition, exhibited excellent performance pyrroloacridine-1(2H)-one chromeno [2, 3- d] pyrimidin-8-amines, well good reusability recyclability.

Language: Английский

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Synthesis of Bi2S3-TiO2 nanocomposite and its electrochemical and enhanced photocatalytic properties for phenol degradation

International Journal of Electrochemical Science, Journal Year: 2023, Volume and Issue: 18(4), P. 100071 - 100071

Published: March 5, 2023

Language: Английский

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Enhancement of immiscible fluid mixing using passive micromixers to increase the performance of liquid–liquid extraction

International Journal of Modern Physics C, Journal Year: 2023, Volume and Issue: 34(11)

Published: March 31, 2023

This paper aims to simulate an immiscible two-phase flow in two-dimensional T-shaped, modified cross-shaped, and cross-shaped micromixers numerically. The effects of various parameters, including Capillary number, phase rate ratio, channel width on the generation droplets were studied. Also, modification T-shaped was proposed. results reveal that equidistant tiny are generated compared ordinary geometry under same conditions. Three types squeezing regime, laminar jetting regime observed different values capillary number. It also droplet size decreases with increase Moreover, this study demonstrates multiphase flows micro-devices very sensitive even small changes geometry.

Language: Английский

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