The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms

Barrett, Elliott P.; Joyner, Leslie G.; Halenda, Paul P.

doi:10.1021/ja01145a126

Cited by 12,006 publications

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“…Considering capillary condensation for both materials starting at P/P o ≈ 0.45, their skeleton pores should be mainly composed of mesopores, in agreement with the estimated pore diameter of 10.7 nm for CM using the Barrett−Joyner− Halenda method. 20 The first plateau of the isotherm was observed at relatively low P/P o values (∼0.15), indicating the presence of some microporous structures ( Figure 3B). The total micropore volume derived from the t-plot was 0.016 cm 3 g −1 (average, n = 3).…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Adsorption and Desorption of Methylene Blue on Porous Carbon Monoliths and Nanocrystalline Cellulose

Male

Nesterenko

et al. 2013

ACS Appl. Mater. Interfaces

348

199

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1021/am403222u ACS Applied Materials & Interfaces, 5, 17, pp. 8796-8804, 2013-08-09 Adsorption and desorption of Methylene blue on porous Carbon monoliths and nanocrystalline cellulose He, Xiaoyun; Male, Keith B.; Nesterenko, Pavel N.; Brabazon, Dermot; Paull, Brett; Luong, John H. T. ABSTRACT:The dynamic batch adsorption of methylene blue (MB), a widely used and toxic dye, onto nanocrystalline cellulose (NCC) and crushed powder of carbon monolith (CM) was investigated using the pseudo-first-and -second-order kinetics. CM outperformed NCC with a maximum capacity of 127 mg/g compared to 101 mg/g for NCC. The Langmuir isotherm model was applicable for describing the binding data for MB on CM and NCC, indicating the homogeneous surface of these two materials. The Gibbs free energy of −15.22 kJ/mol estimated for CM unravelled the spontaneous nature of this adsorbent for MB, appreciably faster than the use of NCC (−4.47 kJ/mol). Both pH and temperature exhibited only a modest effect on the adsorption of MB onto CM. The desorption of MB from CM using acetonitrile was very effective with more than 94 % of MB desorbed from CM within 10 min to allow the reusability of this porous carbon material. In contrast, acetonitrile was less effective than ethanol in desorbing MB from NCC. The two solvents were incapable of completely desorbing MB on commercial granular coal-derived activated carbon.

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Section: ■ Results and Discussionmentioning

confidence: 97%

Adsorption and Desorption of Methylene Blue on Porous Carbon Monoliths and Nanocrystalline Cellulose

Male

Nesterenko

et al. 2013

ACS Appl. Mater. Interfaces

348

199

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“…Surface area calculations were conducted using the BET (Brunauer-Emmett-Teller) method, 39 and the pore diameter calculations were conducted using the BJH (Barrett-Joyner-Halenda) method. 40 …”

Section: Porosimetry Analysismentioning

confidence: 99%

Covalent Heterogenization of a Discrete Mn(II) Bis-Phen Complex by a Metal-Template/Metal-Exchange Method: An Epoxidation Catalyst with Enhanced Reactivity

and

Stack

2008

J. Am. Chem. Soc.

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Considerable attention has been devoted to the immobilization of discrete epoxidation catalysts onto solid supports due to the possible benefits of site isolation such as increased catalyst stability, catalyst recycling, and product separation. A synthetic metal-template/metal-exchange method to imprint a covalently attached bis-1,10-phenanthroline coordination environment onto high-surface area, mesoporous SBA-15 silica is reported herein along with the epoxidation reactivity once reloaded with manganese. Comparisons of this imprinted material with material synthesized by random grafting of the ligand show that the template method creates more reproducible, solution-like bis-1,10-phenanthroline coordination at a variety of ligand loadings. Olefin epoxidation with peracetic acid shows the imprinted manganese catalysts have improved product selectivity for epoxides, greater substrate scope, more efficient use of oxidant, and higher reactivity than their homogeneous or grafted analogues independent of ligand loading. The randomly grafted manganese catalysts, however, show reactivity that varies with ligand loading while the homogeneous analogue degrades trisubstituted olefins and produces trans-epoxide products from cis-olefins. Efficient recycling behavior of the templated catalysts is also possible.

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“…The Barrett-Joyner-Halenda (Barrett et al, 1950) method was used to calculate pore size distribution from nitrogen adsorption isotherms. The value of adsorbed gas, V, at 64 relative pressures P/P0 in the interval 0.046 <~ P/P0 ~< 0.967 has been used.…”

Section: Surface Area and Surface Stabilitymentioning

confidence: 99%

Physicochemical Properties of Montmorillonite Interlayered with Cationic Oxyaluminum Pillars

Occelli¹,

Tindwa

1983

Clays and clay miner.

229

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Abstract--By ion exchanging expandable clay minerals with large, cationic oxyaluminum polymers, "pillars" were introduced that permanently prop open the clay layers. On the basis of thermal, infrared spectroscopic, adsorption, and X-ray powder diffraction (XRD) analysis, the interlayering of commercial sodium bentonite with aluminum chlorohydroxide, lAI1304(OH)24(HzO)12] +7, polymers appears to have produced an expanded clay with a surface area of 200-300 m2/g. The pillared product contained both Br6nsted and Lewis acid sites. XRD and differential scanning calorimetry measurements indicated that the micropore structure of this interlayered clay is stable to 540~ Between 540 ~ and 760~ the pillared day collapsed with a corresponding decrease in surface area (to 55 m2/g) and catalytic cracking activity for a Kuwait gas oil having a 260~176 boiling range.

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The Determination of Pore Volume and Area Distributions in Porous Substances. I. Computations from Nitrogen Isotherms

Cited by 12,006 publications

References 0 publications

Adsorption and Desorption of Methylene Blue on Porous Carbon Monoliths and Nanocrystalline Cellulose

Adsorption and Desorption of Methylene Blue on Porous Carbon Monoliths and Nanocrystalline Cellulose

Covalent Heterogenization of a Discrete Mn(II) Bis-Phen Complex by a Metal-Template/Metal-Exchange Method: An Epoxidation Catalyst with Enhanced Reactivity

Physicochemical Properties of Montmorillonite Interlayered with Cationic Oxyaluminum Pillars

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