Preparation and Characterization of Mesoporous Carbon Materials Based on Hard Coal-Tar Pitch

Mesoporous carbons were prepared by one step method using hard coal pitch as carbon source, in which magnesium oxide was adopted as template. The adsorption value of vitamin B12, specific surface and pore size distribution, surface topography of mesoporous carbons were tested by spectrophotometer, specific surface analyzer and scanning electron microscopy. The results showed that the vitamin B12 absorption value on mesoporous carbon could be improved with suitable carbonization temperature and mass ratio of template agent to carbon source. The maximum value achieved to 103.82mg/g when the mass ratio of MgO to modified pitch was 8:2.

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Synthesis and characterization of mesoporous carbon spheres

Materials Science-Poland ◽

10.2478/msp-2019-0069 ◽

2019 ◽

Vol 37 (4) ◽

pp. 585-589

Author(s):

Shuiping Li ◽

Huajun Zhu ◽

Guilong Xu ◽

Qing Lin ◽

Chengshuang Wang ◽

...

Keyword(s):

Mesoporous Carbon ◽

Cost Effective ◽

Crystal Form ◽

Carbon Sphere ◽

Selective Leaching ◽

Mass Ratio ◽

Step Method ◽

Resorcinol Formaldehyde ◽

Structure Morphology

AbstractA three-step method was used for the synthesis of mesoporous carbon sphere (MCS) material: firstly, silica (SiO2) nanoparticles were synthesized by the modified Stöber procedure; secondly, tetraethyl orthosilicate (TEOS) and cetyltrimethylammonium chloride (CTAC) were grafted onto SiO2 core nanoparticles to prepare SiO2@SiO2-CTAC hard templates; lastly, MCS material was fabricated by carbonizing and selective leaching SiO2/resorcinol-formaldehyde (RF) composites. The influence of the mass ratio of R-F/silica on the structure, morphology and crystal form was studied. The results indicate that the MCS materials have a uniform morphology. The increase of the mass ratio of R-F/silica can increase the specific surface area and pore volume. The three-step method provides a cost-effective procedure for the fabrication of MCS materials with uniform morphology.

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Wormhole-Like Mesoporous Carbons from Gelatine as Multistep Infiltration Effect

Indonesian Journal of Chemistry ◽

10.22146/ijc.21137 ◽

2018 ◽

Vol 16 (3) ◽

pp. 239 ◽

Cited By ~ 7

Author(s):

Maria Ulfa ◽

Wega Trisunaryanti ◽

Iip Izul Falah ◽

Indriana Kartini

Keyword(s):

Thermal Stability ◽

Specific Surface ◽

Mesoporous Carbon ◽

Mesoporous Carbons ◽

Removal Process ◽

Surface Areas ◽

Silica Removal ◽

Specific Surface Areas ◽

Level Effect

Wormhole-like mesoporous carbon from gelatine (WMCG) with two different pore diameters have been synthesized by adopting a modified infiltration treatment. The infiltration effect on the morphology was investigated. The results show that the WMCG sample was obtained after dehydration, pyrolysis and silica removal process. The pore diameters WMCG are 15.2 and 4.8 nm with specific surface areas of 280 m2/g, total pore volumes of 0.5 cm3/g and the thermal stability up to 1400 °C. The bimodal pore of WMCG obtained as the high step of infiltration level effect.

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Bio-inspired chitosan-heme-vitamin B12-derived Fe–Co bimetallic-doped mesoporous carbons for efficiently electro-activating oxygen

Dalton Transactions ◽

10.1039/c8dt04279a ◽

2019 ◽

Vol 48 (7) ◽

pp. 2338-2344 ◽

Cited By ~ 5

Author(s):

Zifan Ma ◽

Longdi Xu ◽

Luyao Liu ◽

Luyao Wang ◽

Xiaoying Zhang ◽

...

Keyword(s):

Vitamin B12 ◽

Mesoporous Carbon ◽

Oxygen Electroreduction ◽

Molecular Structures ◽

Vitamin B ◽

Mesoporous Carbons ◽

Co Doped

Biomass-derived chitosan-heme-vitamin B12 with definitive molecular structures was converted to bimetallic Fe–Co-doped mesoporous carbon for efficient oxygen electroreduction.

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LiBH4 Confined in Nitrogen-Doped Ordered Mesoporous Carbons for Hydrogen Storage

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.858 ◽

2016 ◽

Vol 852 ◽

pp. 858-863 ◽

Cited By ~ 1

Author(s):

Rong Cai ◽

Li Xian Sun ◽

Fen Xu ◽

Yong Jin Zou ◽

Hai Liang Chu

Keyword(s):

Specific Surface ◽

Mesoporous Carbon ◽

Milling Time ◽

Hydrogen Desorption ◽

Mesoporous Carbons ◽

Ordered Mesoporous Carbons ◽

Nitrogen Doped ◽

Ordered Mesoporous ◽

The Stability ◽

Ball Milling Time

Nitrogen-doped ordered mesoporous carbon has been synthesized and used to confine LiBH4 to improve its dehydrogenation properties. The carbon has a high BET specific surface up to 448.25 m2/g with pore size centered at 1.2 and 4.1 nm. The effects of ball milling time and speed on de-hydrogenation were investigated. The onset hydrogen desorption temperature of LiBH4 is reduced to 100 °C by addition 40 wt% carbon, and it can release hydrogen of 8.3 wt% at 380 °C. Furthermore, cyclic dehydrogenation is studiedto estimate the stability of the samples in the present work.

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Monolithic Macroporous-Mesoporous Carbon Using Ionic Liquids as Carbon Source

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.988.23 ◽

2014 ◽

Vol 988 ◽

pp. 23-26

Author(s):

Ai Bing Chen ◽

Yun Hong Yu ◽

Yi Feng Yu ◽

Hai Jun Lv ◽

Ting Ting Xing ◽

...

Keyword(s):

Ionic Liquids ◽

Carbon Source ◽

Mesoporous Silica ◽

Mesoporous Carbon ◽

Structure Directing Agent ◽

Silica Source ◽

Pu Foam ◽

Silica Materials ◽

Mesoporous Silica Materials ◽

Ordered Macroporous

A facile approach is employed for the preparation of hierarchically porous structures monolithic ordered macroporous-mesoporous silica materials (OMS) using the commercially available and cheap polyurethane (PU) foam as monolithic template, triblock copolymer P123 (EO20PO70EO20) as structure-directing agent and tetraethyl orthosilicate (TEOS) as silica source, then monolithic ordered macro porous-mesoporous carbon materials (OMC) is synthesized by using monolithic ordered macroporous-mesoporous silica materials as hard template and ionic liquids as the carbon source. The silica and carbon monoliths possess uniform pore sizes (3.74-3.84 nm) and ordered mesostructure.

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Study of the Porous Structure and High Adsorption Capacity of Biomass-Based Activated Carbon Prepared from Aspen Wood by Ferric Nitrate III Activation

Journal of Biobased Materials and Bioenergy ◽

10.1166/jbmb.2021.2047 ◽

2021 ◽

Vol 15 (2) ◽

pp. 131-144

Author(s):

Chunjiang Jin ◽

Huimin Chen ◽

Luyuan Wang ◽

Xingxing Cheng ◽

Donghai An ◽

...

Keyword(s):

Activated Carbon ◽

Specific Surface ◽

Adsorption Capacity ◽

Surface Area ◽

Specific Surface Area ◽

Pore Volume ◽

Mass Ratio ◽

Aspen Wood ◽

Surface Functional Groups ◽

Wood Sawdust

In this study, aspen wood sawdust was used as the raw material, and Fe(NO3)3 and CO2 were used as activators. Activated carbon powder (ACP) was produced by the one-step physicochemical activation method in an open vacuum tube furnace. The effects of different mass ratios of Fe(NO3)3 and aspen wood sawdust on the pore structure of ACP were examined under single-variable experimental conditions. The mass ratio was 0–0.4. The detailed characteristics of ACP were examined by nitrogen adsorption, scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The adsorption capacity of ACP was established by simulating volatile organic compounds (VOCs) using ethyl acetate. The results showed that ACP has a good nanostructure with a large pore volume, specific surface area, and surface functional groups. The pore volume and specific surface area of Fe-AC-0.3 were 0.26 cm3/g and 455.36 m2/g, respectively. The activator played an important role in the formation of the pore structure and morphology of ACP. When the mass ratio was 0–0.3, the porosity increased linearly, but when it was higher than 0.3, the porosity decreased. For example, the pore volume and specific surface area of Fe-AC-0.4 reached 0.24 cm3/g and 430.87 m2/g, respectively. ACP presented good VOC adsorption performance. The Fe-AC-0.3 sample, which contained the most micropore structures, presented the best adsorption capacity for ethyl acetate at 712.58 mg/g. Under the action of the specific reaction products nitrogen dioxide (NO2) and oxygen, the surface of modified ACP samples showed different rich C/O/N surface functional groups, including C-H, C=C, C=O, C-O-C, and C-N.

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Highly Mesoporous Carbon Aerogel as Catalyst Support in Proton Exchange Membrane Fuel Cells

10.26434/chemrxiv.11436012.v1 ◽

2019 ◽

Author(s):

Kevin Gu ◽

Eric J. Kim ◽

Sunil K. Sharma ◽

[email protected] [email protected]

Keyword(s):

Fuel Cells ◽

Activated Carbon ◽

Specific Surface ◽

Surface Area ◽

Mesoporous Carbon ◽

Proton Exchange Membrane ◽

Catalyst Support ◽

Carbon Aerogel ◽

Proton Exchange ◽

Exchange Membrane

<p>Carbon aerogel possesses unique structural and electrical properties, such as high mesopore volume, specific surface area, and electrical conductivity, which make it suitable for use as a catalyst support in Proton Exchange Membrane Fuel Cells (PEMFC). In this study, we present a novel synthesis of highly mesoporous carbon aerogel via ambient-drying and investigate its application in PEMFCs. The structural effects of activation on carbon aerogel were also studied. The TEM, XRF, Non Localized Density Function Theory (NLDFT) and BJH analysis were carried out to observe the morphology and pore structure. Pt on carbon aerogel and activated carbon aerogel show efficient activity in both oxygen reduction and hydrogen oxidation reactions compared to Pt on Vulcan XC-72, with increases up to 715% and 195% in specific power density, respectively. The enhanced performance of carbon aerogel is attributed to its large specific surface area and high mesopore to micropore ratio. Accelerated stress tests show that carbon aerogel has comparable durability with Vulcan XC-72, while activated carbon aerogel is less durable than both materials. Thus, the mesoporous carbon aerogel provides an efficient, lower-cost alternative to existing microporous carbon material as a catalyst support in PEMFCs.</p><p></p>

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Synthesis of C–N dual-doped Cr2O3 visible light-driven photocatalysts derived from metalorganic framework (MOF) for cyclohexane oxidation

RSC Advances ◽

10.1039/c6ra09908d ◽

2016 ◽

Vol 6 (88) ◽

pp. 84871-84881 ◽

Cited By ~ 19

Author(s):

Hui Wang ◽

Ying Zhang ◽

Limei Zhang ◽

Yanying Guo ◽

Suyan Liu ◽

...

Keyword(s):

Carbon Source ◽

Visible Light ◽

Nitrogen Atmosphere ◽

Cyclohexane Oxidation ◽

Step Method ◽

Metalorganic Framework ◽

Visible Light Driven ◽

Subsequent Calcination

A series of novel C–N dual-doped Cr2O3 photocatalysts were synthesized from MIL-101(Cr), using a two-step method, including initial carbonization in nitrogen atmosphere without adding any carbon source and subsequent calcination in air.

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A non-micellar synthesis of mesoporous carbon via spinodal decomposition

RSC Advances ◽

10.1039/c4ra03558e ◽

2014 ◽

Vol 4 (45) ◽

pp. 23703-23706 ◽

Cited By ~ 4

Author(s):

Kimberly M. Nelson ◽

Zhen-An Qiao ◽

Shannon M. Mahurin ◽

Richard T. Mayes ◽

Craig A. Bridges ◽

...

Keyword(s):

Polyethylene Glycol ◽

Spinodal Decomposition ◽

Mesoporous Carbon ◽

Formaldehyde Resin ◽

Mesoporous Carbons ◽

Linear Polyethylene

Mesoporous carbons were prepared via spinodal decomposition of non-amphiphilic linear polyethylene glycol with phloroglucinol–formaldehyde resin under refluxing acidic ethanol conditions.

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