Truxene-based porous polymers: from synthesis to catalytic activity

2018 ◽  
Vol 9 (36) ◽  
pp. 4585-4595 ◽  
Author(s):  
Jordy Guadalupe ◽  
Ana M. Ray ◽  
Eva M. Maya ◽  
Berta Gómez-Lor ◽  
Marta Iglesias
Keyword(s):  
Catalytic Activity ◽  
Specific Surface ◽  
Porous Polymers ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Surface Areas ◽  
Specific Surface Areas

New, robust, insoluble porous organic polymers based on the semiconducting platform of hexamethyltruxene with high Brunauer–Emmett–Teller specific surface areas and interesting catalytic activity are presented.

scholarly journals Advances in Porous Organic Polymers: Syntheses, Structures, and Diverse Applications

2021 ◽  
Author(s):  
Mohamed Gamal Mohamed ◽  
Ahmed F. M. EL-Mahdy ◽  
Mohammed G. Kotp ◽  
Shiao-Wei Kuo
Keyword(s):  
Specific Surface ◽  
Organic Polymers ◽  
High Chemical ◽  
Porous Organic Polymers ◽  
Thermal Stabilities ◽  
Surface Areas ◽  
Specific Surface Areas

Porous organic polymers (POPs) are organic macromolecules that are considered emerging materials because of their high specific surface areas, tunable porosities, low densities, high chemical and thermal stabilities, variable compositions,...

Monocrystalline Ni12P5hollow spheres with ultrahigh specific surface areas as advanced electrocatalysts for the hydrogen evolution reaction

2016 ◽  
Vol 4 (25) ◽  
pp. 9755-9759 ◽  
Author(s):  
Jinfa Chang ◽  
Songtao Li ◽  
Guoqiang Li ◽  
Junjie Ge ◽  
Changpeng Liu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Specific Surface ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Hollow Spheres ◽  
Microemulsion Method ◽  
Acidic Solutions ◽  
Surface Areas ◽  
Specific Surface Areas

Monocrystalline Ni12P5hollow spheres with ultrahigh specific surface areas were synthesized by a water-in-oil microemulsion method, which exhibited excellent catalytic activity and ultrastrong stability towards the hydrogen evolution reaction in acidic solutions.

CATALYTIC ACTIVITY FOR METHANE OXIDATION OF GOETHITE SUPPORTED ON ALUMINA

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4249-4254 ◽  
Author(s):  
KEI-ICHIRO MURAI ◽  
KOHEI TOMITA ◽  
SUGURU TOJO ◽  
TOSHIHIRO MORIGA ◽  
ICHIRO NAKABAYASHI
Keyword(s):  
Catalytic Activity ◽  
Specific Surface ◽  
Methane Oxidation ◽  
Model Experiment ◽  
The Other ◽  
Catalytic Activities ◽  
Surface Areas ◽  
Oxidation Of Methane ◽  
Other Hand ◽  
Specific Surface Areas

Two kinds of α- Fe 2 O 3 catalysts supported on χ- Al 2 O 3 and γ- Al 2 O 3 were synthesized. α- Fe 2 O 3 was prepared from α- FeOOH . As a model experiment, an investigation was made with the oxidation of methane. As all catalysts with various Fe contents supported on χ- Al 2 O 3 with various Fe contents had higher specific surface areas than those supported on γ- Al 2 O 3, α- Fe 2 O 3/χ- Al 2 O 3 catalyst has higher catalytic activities than α- Fe 2 O 3/γ- Al 2 O 3 catalyst. From SEM-EDS analyses, it is concluded that in α- Fe 2 O 3/χ- Al 2 O 3 catalyst, α- Fe 2 O 3 exists mainly on the surface of the support, because of flatness of the surface of χ- Al 2 O 3. On the other hand, in the case of α- Fe 2 O 3/γ- Al 2 O 3 catalyst, as the surface of support, γ- Al 2 O 3, is uneven, α- Fe 2 O 3 do not partially exist on the surface but in the pores.

Effect of Different Silicate Supports on the Catalytic Performance of MoVTeO Mixed Oxides in Partial Oxidation of Isobutane

2014 ◽  
Vol 12 (1) ◽  
pp. 623-628
Author(s):  
Jing Hu ◽  
Zhifang Li ◽  
Xiaoyuan Yang ◽  
Wenli Ding ◽  
Jingqi Guan
Keyword(s):  
Catalytic Activity ◽  
Specific Surface ◽  
Surface Area ◽  
Partial Oxidation ◽  
Mixed Oxides ◽  
Supported Catalysts ◽  
Catalytic Performance ◽  
Surface Areas ◽  
Specific Surface Areas ◽  
Mcm 41

Abstract A series of 5% MoV0.3Te0.25 supported on different silicates (i.e. SiO2, HMS, MCM-41, and MCM-48) have been prepared, characterized, and tested as catalysts in the partial oxidation of isobutane to methacrolein. Characterization results showed that the supports almost kept intact structures after supporting 5 wt.% MoV0.3Te0.25 and the supported catalysts had large specific surface areas. Catalytic tests showed that the specific surface area played a key role in the catalytic activity for the supported catalysts.

N-doped carbon nanocages with high catalytic activity and durability for oxygen reduction

2015 ◽  
Vol 3 (23) ◽  
pp. 12427-12435 ◽  
Author(s):  
Xiao Xia Wang ◽  
Biao Zou ◽  
Xin Xin Du ◽  
Jian Nong Wang
Keyword(s):  
Catalytic Activity ◽  
Oxygen Reduction Reaction ◽  
Specific Surface ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
High Catalytic Activity ◽  
Surface Areas ◽  
Excellent Activity ◽  
Specific Surface Areas

N-doped carbon nanocages with high specific surface areas exhibited excellent activity and durability for oxygen reduction reaction in acidic electrolytes.

scholarly journals Elucidating the role of non-covalent interactions in unexpectedly high and selective CO2 uptake and catalytic conversion of porphyrin-based ionic organic polymers

2021 ◽  
Author(s):  
Sinem Tuncel Kostakoğlu ◽  
Yu. Chumakov ◽  
Yunus Zorlu ◽  
Ali Enis Sadak ◽  
Serpil Denizalti ◽  
...  
Keyword(s):  
Specific Surface ◽  
Catalytic Conversion ◽  
Co2 Uptake ◽  
Organic Polymers ◽  
Surface Areas ◽  
Non Covalent Interactions ◽  
Specific Surface Areas ◽  
Covalent Interactions

Here, we present the viologen-porphyrin based ionic covalent organic polymers (H2-ICOP and Zn-ICOP) with multiple CO2-philic sites. The specific surface areas of H2-ICOP and Zn-ICOP were found to be 9...

scholarly journals Ultrafine porous boron nitride nanofibers synthesized via a freeze-drying and pyrolysis process and their adsorption properties

RSC Advances ◽  
2016 ◽  
Vol 6 (2) ◽  
pp. 1253-1259 ◽  
Author(s):  
Jing Lin ◽  
Lulu Xu ◽  
Yang Huang ◽  
Jie Li ◽  
Weijia Wang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Specific Surface ◽  
Freeze Drying ◽  
Adsorption Properties ◽  
Pyrolysis Process ◽  
Surface Areas ◽  
Aspect Ratios ◽  
Large Pore ◽  
Specific Surface Areas

Ultrafine porous boron nitride nanofibers with high aspect ratios, high specific surface areas and large pore volumes has been synthesized in large quantity via a freeze-drying and post pyrolysis process.

scholarly journals Experimental Investigation of Coal Dust Wettability Based on Surface Contact Angle

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Gang Zhou ◽  
Han Qiu ◽  
Qi Zhang ◽  
Mao Xu ◽  
Jiayuan Wang ◽  
...  
Keyword(s):  
Surface Tension ◽  
Contact Angle ◽  
Specific Surface ◽  
Coal Dust ◽  
Single Point ◽  
Contact Angles ◽  
Critical Surface ◽  
Volume Percentage ◽  
Surface Areas ◽  
Specific Surface Areas

Wettability is one of the key chemical properties of coal dust, which is very important to dedusting. In this paper, the theory of liquid wetting solid was presented firstly; then, taking the gas coal of Xinglongzhuang coal mine in China as an example, by determination of critical surface tension of coal piece, it can be concluded that only when the surface tension of surfactant solution is less than 45 mN/m can the coal sample be fully wetted. Due to the effect of particle dispersity, compared with the contact angle of milled coal particle, not all the contact angles of screened coal powder with different sizes have a tendency to increase. Furthermore, by the experiments of coal samples’ specific surface areas and porosities, it can be achieved that the volume of single-point total pore decreases with the gradual decreasing of coal’s porosity, while the ultramicropores’ dispersities and multipoint BET specific surface areas increase. Besides, by a series of contact angle experiments with different surfactants, it can be found that with the increasing of porosity and the decreasing of volume percentage of ultramicropore, the contact angle tends to reduce gradually and the coal dust is much easier to get wetted.

Facile Method To Synthesize Mesoporous Multimetal Oxides (ATiO3, A = Sr, Ba) with Large Specific Surface Areas and Crystalline Pore walls

2010 ◽  
Vol 22 (4) ◽  
pp. 1276-1278 ◽  
Author(s):  
Xiaoxing Fan ◽  
Ying Wang ◽  
Xinyi Chen ◽  
Ling Gao ◽  
Wenjun Luo ◽  
...  
Keyword(s):  
Specific Surface ◽  
Surface Areas ◽  
Specific Surface Areas
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