Vanadium nitride@N-doped carbon nanocomposites: tuning of pore structure and particle size through salt templating and its influence on supercapacitance in ionic liquid media

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 26981-26989 ◽  
Author(s):  
Nina Fechler ◽  
Girum Ayalneh Tiruye ◽  
Rebeca Marcilla ◽  
Markus Antonietti
Keyword(s):  
Particle Size ◽  
Ionic Liquid ◽  
Pore Structure ◽  
Pore Volume ◽  
Porous Metal ◽  
Vanadium Nitride ◽  
Carbon Composites ◽  
Liquid Media ◽  
Carbon Nanocomposites ◽  
Highly Porous

Using salts as porogens, highly porous metal nitride@N-doped carbon composites with tunable surface area, pore size, pore volume and particle size are synthesized and systematically tested as supercapacitor electrodes.

Unusual pore structure and sorption behaviour in a hexanodal zinc–organic framework material

2014 ◽  
Vol 50 (14) ◽  
pp. 1678-1681 ◽  
Author(s):  
Jinjie Qian ◽  
Feilong Jiang ◽  
Linjie Zhang ◽  
Kongzhao Su ◽  
Jie Pan ◽  
...  
Keyword(s):  
Pore Structure ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Sorption Behaviour ◽  
Metal Organic ◽  
Highly Porous ◽  
Organic Framework

A highly porous metal–organic framework structurally consists of three topological kinds of 3-connected 1,3,5-benzenetricarboxylate ligands, Zn2(COO)4, Zn3O(COO)6 and Zn4O(COO)6 SBUs, featuring a new 3,3,3,4,4,6-c hexanodal topology.

scholarly journals Preparation and catalytic study of novel highly porous metal-carbon nanocomposites based on bimetallic Co-Ru nanoparticles

2018 ◽  
Vol 1134 ◽  
pp. 012012
Author(s):  
M N Efimov ◽  
E Yu Mironova ◽  
A A Vasilev ◽  
A A Pavlov ◽  
D G Muratov ◽  
...  
Keyword(s):  
Porous Metal ◽  
Carbon Nanocomposites ◽  
Ru Nanoparticles ◽  
Highly Porous

Experimental Study of the Pore Structure Characterization in Shale With Different Particle Size

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
Shuwen Zhang ◽  
Xuefu Xian ◽  
Junping Zhou ◽  
Guojun Liu ◽  
Yaowen Guo ◽  
...  
Keyword(s):  
Particle Size ◽  
Specific Surface ◽  
Pore Structure ◽  
Pore Volume ◽  
Gas Adsorption ◽  
Total Pore Volume ◽  
Structure Characterization ◽  
Particle Sizes ◽  
Average Pore ◽  
Longmaxi Shale

In order to study the effects of particle size on the determination of pore structure in shale, the outcrop of Ordovician Wufeng (WF) and Silurian Longmaxi shale (LMX) samples from Sichuan basin were chosen and crushed into various particle sizes. Then, pore structure was analyzed by using low-pressure gas adsorption (LPGA) tests. The results show that the pore of shales is mainly composed of slit-type pores and open pores. The specific surface areas of shale are mainly contributed by micropores, while the largest proportion of the total pore volume in shale is contributed by mesopores. With the decreasing of particle size, the specific surface area of both samples is decreased, while average pore diameter and the total pore volume are increased gradually. The influences of particle size on the pore structure parameters are more significant for micropore and macropore, as the particle sizes decrease from 2.36 mm to 0.075 mm, the volume of micropores in Longmaxi shale increases from 0.283 cm3/100 g to 0.501 cm3/100 g with an increment almost 40%, while the volume of macropores decreases from 0.732 cm3/100 g to 0.260 cm3/100 g with a decrement about 50%. This study identified the fractal dimensions at relative pressures of 0–0.50 and 0.50–0.995 as D1 and D2, respectively. D1 increases with the decrease of particle size of shale, while D2 shows an opposite tendency in both shale samples.

scholarly journals The Effect of Pressure on Pore Structure in Mercury Porosimetry

1987 ◽  
Vol 4 (4) ◽  
pp. 241-250 ◽  
Author(s):  
A.M.L. Hustings ◽  
J.J.F. Scholten
Keyword(s):  
Mechanical Strength ◽  
Pore Structure ◽  
Pore Volume ◽  
Pressure Range ◽  
Capillary Condensation ◽  
Mercury Porosimetry ◽  
Porous Structures ◽  
Effect Of Pressure ◽  
High Mercury ◽  
Highly Porous

The pore volume distributions of chrysotile, Mg3(OH)4. Si2O5, ZrO2 and of four samples of silica with pore volumes from 1.45 to 2.70 cm3/g have been measured by means of nitrogen capillary condensation and mercury penetration. It is shown that compaction of the porous structures can occur under the influence of the high mercury pressures applied. The degree of compaction depends on the mechanical strength of the sample, its initial porosity and the magnitude of the mercury pressure. The extremely strong ZrO2 sample, with its low pore volume of 0.18 cm3/g does not show any sign of cracking up to pressures as high as 190 MPa. Hollow chrysotile needles compact in the pressure range from 100 to 400 MPa. Highly porous silicas all show severe compaction. In accordance with Brown & Lard (Brown & Lard, 1974) it is concluded that silicas with pore volumes larger than 1.2 cm3/g are not suitable for study by mercury porosimetry.

scholarly journals Nanometer Pore Structure Characterization of Taiyuan Formation Shale in the Lin-Xing Area Based on Nitrogen Adsorption Experiments

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 298
Author(s):  
Chenlong Ding ◽  
Jinxian He ◽  
Hongchen Wu ◽  
Xiaoli Zhang
Keyword(s):  
Specific Surface ◽  
Pore Structure ◽  
Surface Area ◽  
Specific Surface Area ◽  
Shale Gas ◽  
Pore Volume ◽  
Ordos Basin ◽  
Total Pore Volume ◽  
Nitrogen Adsorption ◽  
Taiyuan Formation

Ordos Basin is an important continental shale gas exploration site in China. The micropore structure of the shale reservoir is of great importance for shale gas evaluation. The Taiyuan Formation of the lower Permian is the main exploration interval for this area. To examine the nanometer pore structures in the Taiyuan Formation shale reservoirs in the Lin-Xing area, Northern Shaanxi, the microscopic pore structure characteristics were analyzed via nitrogen adsorption experiments. The pore structure parameters, such as specific surface area, pore volume, and aperture distribution, of shale were calculated; the significance of the pore structure for shale gas storage was analyzed; and the main controlling factors of pore development were assessed. The results indicated the surface area and hole volume of the shale sample to be 0.141–2.188 m2/g and 0.001398–0.008718 cm3/g, respectively. According to the IUPAC (International Union of Pure and Applied Chemistry) classification, mesopores and macropores were dominant in the pore structure, with the presence of a certain number of micropores. The adsorption curves were similar to the standard IV (a)-type isotherm line, and the hysteresis loop type was mainly similar to H3 and H4 types, indicating that most pores are dominated by open type pores, such as parallel plate-shaped pores and wedge-shaped slit pores. The micropores and mesopores provide the vast majority of the specific surface area, functioning as the main area for the adsorption of gas in the shale. The mesopores and macropores provide the vast majority of the pore volume, functioning as the main storage areas for the gas in the shale. Total organic carbon had no notable linear correlation with the total pore volume and the specific surface area. Vitrinite reflectance (Ro) had no notable correlation with the specific surface area, but did have a low “U” curve correlation with the total pore volume. There was no relationship between the quartz content and specific surface area and total pore volume. In addition, there was no notable correlation between the clay mineral content and total specific surface area and total pore volume.

scholarly journals Physicochemical factors affecting the wettability of copper mine blasting dust

2021 ◽  
Author(s):  
Longzhe Jin ◽  
Jianguo Liu ◽  
Jingzhong Guo ◽  
Jiaying Wang ◽  
Tianyang Wang
Keyword(s):  
Particle Size ◽  
Physicochemical Properties ◽  
Pore Structure ◽  
Total Pore Volume ◽  
Open Pit ◽  
X Rays ◽  
Factors Affecting ◽  
Copper Mine ◽  
Mineral Components ◽  
Hydrophobic Component

AbstractTo investigate the factors affecting the wettability of copper mine blasting dust, the primary blasting dust was collected from an open-pit copper mine and separated into hydrophilic blasting dust (HLBD) and hydrophobic blasting dust (HBBD) using water flotation method. The physicochemical properties of HLBD and HBBD were measured and compared with each other. The properties included particle size distributions (PSDs), micromorphologies, pore structures, mineral components and surface organic carbon functional groups. The results show that particle size and pore structure of the blasting dust are the main factors affecting its wettability. Specifically, particle size of HBBD is smaller than that of HLBD, and their respiratory dust (less than 10 µm) accounts for 61.74 vol% and 53.00 vol%, respectively. The pore structure of HBBD is more developed, and the total pore volume of HBBD is 1.66 times larger than that of HLBD. The identical mineral compositions were detected in HLBD and HBBD by X-rays diffraction (XRD); however, the surface organic hydrophobic component of HBBD is slightly larger than that of HLBD, this may be the reason for the poor wettability of HBBD. This study is significant to understand the effects of physicochemical properties of copper mine blasting dust on its wettability.

Green synthesis of mesoporous MnNbOx oxide by a liquid induced self-assembly strategy for low-temperature removal of NOx

2019 ◽  
Vol 55 (100) ◽  
pp. 15073-15076 ◽  
Author(s):  
Huifang Cheng ◽  
Guodong Feng ◽  
Zhenzhen Yang ◽  
Tao Wang ◽  
Francis Okejiri ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Low Temperature ◽  
Green Synthesis ◽  
Self Assembly ◽  
Assembly Strategy ◽  
Highly Porous

A highly porous MnNbOx with excellent low-temperature NOx reduction was fabricated by a facile, sustainable ionic liquid induced self-assembly strategy.

Electrochemical Determination of pKaof N-Bases in Ionic Liquid Media

2011 ◽  
Vol 116 (1) ◽  
pp. 277-282 ◽  
Author(s):  
Rachid Barhdadi ◽  
Michel Troupel ◽  
Clément Comminges ◽  
Michel Laurent ◽  
Andrew Doherty
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Determination ◽  
Liquid Media
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