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1Catalytic process modeling and sensitivity analysis of alkylation of benzene with ethanol over MIL-101(Fe) and MIL-88(Fe)显示文摘A solvothermal method was used to synthesize MIL-101(Fe)and MIL-88(Fe),which were used for alkylation of benzene.The synthesized catalysts were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,field emission scanning electron microscope,dynamic light scattering,and BET techniques.Metal-organic frameworks(MOFs)were modeled to investigate the catalytic performance and existence of mass transfer limitations.Calculated effectiveness factors revealed absence of internal a nd external mass transfer.Sensitivity analysis revealed best operating conditions over MIL-101 at 120℃ and 5 bar and over MIL-88 at 142℃ and 9 bar.Ehsan Rahmani Mohammad Rahmani 2020Frontiers of Chemical Science and Engineering2020,14,6:2
2Zeolitic imidazolate framework-8 (ZIF-8) for drug delivery: a critical review显示文摘Zeolitie imidazolate framework-8(ZIF-8),composed of Zn ions and imidazolate ligands,is a class of metal-organic frameworks,which possesses a similar structure as conventional aluminosilicate zeolites.This material exhibits inherent porous property,high loading capacity,and pH-sensitive degradation,as well as excep-tional thermal and chemical stability.Extensive research effort has been devoted 10 relevant research aspects ranging from synthesis methods,property characterization to potential applications of ZIF-8.This review focuses on the recent development of ZIF-8 synthesis methods and its promising appications in drug delivery.The potential risks of using ZIF-8 for drug delivery are also summarized.Simin Feng Xiaoli Zhang Dunyun Shi Zheng Wang 2021Frontiers of Chemical Science and Engineering2021,15,2:1
3Trihydrazinotrazine-grafting Fe_(3)O_(4)/SiO_(2) core-shell nanoparticles with expanded porous structure for organic reactions显示文摘This study focuses on the synthesis and characterization of a novel magnetic nanocomposite 2,4,6-trihydrazino-1,3,5-triazine(THDT)-fimctionalized with silica-coated iron oxide magnetic nanoparticles(MNPs).This nanocomposite has porous morphology decorated with the spherical MNPs.Through co-precipitation of iron salts,MNPs were obtained.The prepared THDT was placed on the chlorine surface-modified MNPs.The present environment-friendly nanocatalyst intensely accelerated the synthesis of highly functionalized tetra-hydrobenzo[b]pyran derivatives as well as reduced the reaction times and increased yields of the products.Jamal Rahimi Seyedeh Shadi Mirmohammadi Ali Maleki 2021Frontiers of Chemical Science and Engineering2021,15,4:0
4Parametric study on the mixed solvent synthesis of ZIF-8 nano- and micro-particles for CO adsorption: A response surface study显示文摘The room temperature synthesis of ZIF-8 micro-and nano-particles was investigated using a mixed methanol-water solvent system.ZIF-8 particles of good quality and high crystallinity were obtained.Response surface methodology was used to determine the effect of the synthesis conditions on the ZIF-8 yield,particle size distribution,and mean particle size.The ligand/metal salt molar ratio followed by the amount of sodium formate(the deprotonating agent)and then the amount of water(i.e,the composition of the mixed solvent)respectively had the largest effects on both the ZIF-8 yield and particle size.Results showed that mixing of solvents with different strengths in producing ZIF-8 crystals is a practical method to size-controlled synthesis of ZIF-8 particles.This method is more favorable for industrial-scale ZIF-8 synthesis than using excess amounts of ligands or chemical additives(like sodium formate).In addition,ZIF-8 samples with different mean particle sizes(100,500,and 1000 nm)were used for CO adsorption and the mid-sized ZIF-8 particles had the highest adsorption capacity.Alireza Hadi Javad Karimi-Sabet Abolfazl Dastbaz 2020Frontiers of Chemical Science and Engineering2020,14,4:0
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