Introducing a self-consistent test and the corresponding modification in the Barrett, Joyner and Halenda method for pore-size determination

Villarroel-Rocha, Jhonny; Barrera, Deicy; Sapag, Karim

doi:10.1016/j.micromeso.2014.08.017

Cited by 145 publications

(53 citation statements)

References 35 publications

(56 reference statements)

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“…However, it must be taken into account that the BJH method used in the generation of PSD plots from the isotherm systematically underestimates the pore diameter. 39 Despite these PSD curves were corrected by Kruk-Jaroniec-Sayari method, 34 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 (Table S1). This loss is clearly closer to the second loss of MIL-100(Fe).…”

Section: Febtc-10minmentioning

confidence: 99%

Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework

Sánchez‐Sánchez

Asúa

Ruano

et al. 2015

Crystal Growth & Design

113

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Paradoxically, one of the most widely and successfully tested metal−organic framework (MOF)-based catalysts, i.e., the Fe-BTC material commercialized as Basolite F300, entails a certain "mystery": Its structure is unknown and only an indirect and complex preparation method has been reported. This work describes an easy preparation method of a Basolite F300-like material. Furthermore, this synthesis procedure is carried out under environmentally and economically sustainable conditions: at room temperature, in a few minutes and using water as the unique solvent. Several characterization techniques indicate that both commercial and lab-made Fe-BTC materials are very much similar in so many physicochemical properties. However, the herein reported Fe-BTC possesses better textural properties, especially regarding the external surface area. Both Fe-BTC materials catalyze the oxidation of cyclohexene with very similar selectivity. However, the sample prepared in the laboratory gives a notably higher conversion, which was attributed to its external surface area. Iron leaching, if any, was negligible, and no significant structural transformation was detected. Finally, this paper also gives valuable structural information about the semiamorphous Fe-BTC: it exclusively contains the smallest mesocages of MIL-100(Fe), which provides an important input for interpreting the role of these Fe-BTC materials in any application demanding high porosity.

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Section: Febtc-10minmentioning

confidence: 99%

Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework

Sánchez‐Sánchez

Asúa

Ruano

et al. 2015

Crystal Growth & Design

113

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“…a and b) of the four samples are identified as type IV isotherms with H3‐hysteresis loops , indicated that the samples show flat slit structure, cracks or wedge structure. The PSD in mesoporous materials is usually determined by BJH theory, which based on the capillary condensation theory, using the Kelvin equation, where a cylindrical pore geometry is assumed and the desorption branch data of the isotherm are used , the calculated parameters of samples are listed in Table . The average pore sizes of MGO‐NH 2 , MGO‐PAMAM‐G1.0, HMGO‐NH 2 , and HMGO‐PAMAM‐G1.0 are 6.8536, 5.9751, 15.5569, and 15.4874 nm, respectively, indicating the existence of mesoporous.…”

Section: Resultsmentioning

confidence: 99%

Magnetic graphene oxide grafted with different hydrophobic chain lengths low‐generation polyamidoamine dendrimers for adsorption of Pb(II) and Hg(II) in aqueous solution

Shao

Jin

et al. 2018

Polymer Composites

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In this study, using hexamethylenediamine (HMD)‐modified magnetic graphene oxide (HMGO‐NH2) as carrier, HMD and methyl acrylate as function monomers, MGO grafted with longer hydrophobic chain length low‐generation HMD type polyamidoamine dendrimers (HMGO‐PAMAM‐G1.0) was prepared by Michael addition and amidation condensation reaction. The obtained HMGO‐PAMAM‐G1.0 sample was characterized by transmission electron microscope, X‐ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption/desorption isotherms, thermal properties analysis, vibrating sample magnetometer, and X‐ray photoelectron spectroscopy analysis. The adsorption properties for Pb(II) and Hg(II) heavy metal ions of HMGO‐PAMAM‐G1.0 and the magnetic graphene oxide grafted with shorter hydrophobic chain length low‐generation ethylenediamine type polyamidoamine dendrimers (MGO‐PAMAM‐G1.0) reported in our previous work were explored. The results showed that the HMGO‐PAMAM‐G1.0 with longer hydrophobic chain length had higher adsorption capacity for Pb(II) and Hg(II) than MGO‐PAMAM‐G1.0 at the higher concentrations. The adsorption process of HMGO‐PAMAM‐G1.0 and MGO‐PAMAM‐G1.0 for Pb(II) and Hg(II) was well in agreement with pseudo‐second‐order kinetic model and the Langmuir isotherm model. The Pb(II) was only adsorbed on the sample, while the Hg(II) was partially reduced to Hg(I) in the adsorption process. POLYM. COMPOS., 40:E1685–E1696, 2019. © 2018 Society of Plastics Engineers

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“…35 The phase structure of the spent and fresh catalysts was characterized by using X-ray diffractometer (XRD, X'Pert MPD Pro, Panalytical, Netherlands) with Cu Ka radiation (l ¼ 1.5408Å) at 40 kV and 40 mA. The model used to calculate the pore size distribution is BJH method desorption pore size distribution.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

CO methanation over a macro–mesoporous Al₂O₃ supported Ni catalyst in a fluidized bed reactor

Zhou

Zhu

et al. 2015

RSC Adv.

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The synthesis and characterization of highly active and stable Ni nanoparticles supported on macromesoporous Al 2 O 3 as a CO methanation catalyst for the production of synthetic natural gas are reported. The macro-mesoporous Ni-Al 2 O 3 catalyst (MNC) is synthesized by combination of sol-gel and supercritical drying methods. The MNC showed much higher activity and higher thermal stability for methanation than the catalyst obtained via the conventional wet impregnation method, especially under harsh conditions of high temperatures and high GHSV (90 000 h À1 ). The enhancement in activity of the synthesized MNC catalyst is attributed to the highly stable and smaller Ni nanoparticles that are embedded on the macro-mesoporous structure. The MNC also showed a higher rate constant and lower diffusion activation energy, which should be attributed to the macro-mesoporous structure that facilitated the diffusion of gas products and then enhanced the removal of reaction heat from the catalyst surface. Thus leading to a higher resistance to Ni sintering and carbon deposition.

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Introducing a self-consistent test and the corresponding modification in the Barrett, Joyner and Halenda method for pore-size determination

Cited by 145 publications

References 35 publications

Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework

Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework

Magnetic graphene oxide grafted with different hydrophobic chain lengths low‐generation polyamidoamine dendrimers for adsorption of Pb(II) and Hg(II) in aqueous solution

CO methanation over a macro–mesoporous Al₂O₃ supported Ni catalyst in a fluidized bed reactor

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Introducing a self-consistent test and the corresponding modification in the Barrett, Joyner and Halenda method for pore-size determination

Cited by 145 publications

References 35 publications

Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework

Direct Synthesis, Structural Features, and Enhanced Catalytic Activity of the Basolite F300-like Semiamorphous Fe-BTC Framework

Magnetic graphene oxide grafted with different hydrophobic chain lengths low‐generation polyamidoamine dendrimers for adsorption of Pb(II) and Hg(II) in aqueous solution

CO methanation over a macro–mesoporous Al2O3 supported Ni catalyst in a fluidized bed reactor

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CO methanation over a macro–mesoporous Al₂O₃ supported Ni catalyst in a fluidized bed reactor