A series of MOFs constructed from 5-((carboxymethyl)amino)isophthalic acid (H3cmai) have been prepared and characterised, with [Cd3(cmai)2(H2O)4]·4H2O demonstrating loss of water in a single-crystal-to-single-crystal transformation.
Development of a poly-functional catalyst that has higher hydrodealkylation activity based on 15% Cr/γ -Al 2 O 3 was researched for benzene production from an alkyl-aromatic mixture via hydrodealkylation. For this goal, the effects of the promoters like Fe, Co, or Ni and their concentrations on the activity of a Cr/Al 2 O 3 catalyst were investigated. Toluene + n-heptane + tetrahydrotiophene (89:10:1 w%) model mixture, which has the same content as industrial aromatics, was used as feedstock. The activities of catalysis in reactions of hydrodealkylation, hydrocracking, and hydrogenolize with respect to conversions of toluene, heptane, and tetrahydrotiophene were tested, respectively. As to the obtained results, the catalyst including 5% Fe has a higher hydrodealkylation activity, compared to the catalyst including Co, and especially to the alumocrom catalyst not including a promoter, while it has a lower coke formation and reduced activity to the catalyst including Ni.
Background: Heterogeneous photocatalysis has been considered one of the most attractive methods in the wastewater remediation process due to allowing continuous re-use, the reactions taking place at room temperature, and photocatalysts are inexpensive.Objective: With the optimization of the structural properties of hematite at the nanometer level by utilizing engineering strategies such as morphology regulation, and shape control, it is possible to enhance its photocatalytic performance. The study's main objective is to improve photocatalytic performances of visible-light photoactive hematite materials produced by engineering strategies.Methods: The α-Fe 2 O 3 photocatalyst fibres with highly porous were fabricated by electrospinning method, allowing extraordinary length, a large ratio of length to diameter, hierarchically porous structure, high surface area, small grain sizes, and high porosity.Results: In the heterogeneous photocatalysis of the electrospun α-Fe 2 O 3 nanofibers against two model dyes representing anionic (MO) and cationic (RhB) characteristics, both electrospun α-Fe 2 O 3 nanofibers showed good photocatalytic activity against used model pollutants. The α-α-Fe 2 O 3 nanofibers produced using iron(III) chloride hexahydrate exhibited a higher photocatalytic degradation rate against both dye pollutants relative to the α-α-Fe 2 O 3 nanofibers produced using iron(III) chloride. Conclusions: Depending on the used iron sources and associatively their final morphological characteristics, it was observed that their photocatalytic degradation performances were seriously affected. It is suggested that electrospun α-Fe 2 O 3 nanofibers, especially those with highly porous and smaller diameters, are suitable candidates as a visible-light-driven semiconductor material to use in advanced oxidation processes for removing pollutants from wastewater.
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