A microporous and high surface area active carbon obtained by the heat-treatment of chitosan

Carbon ◽  
2012 ◽  
Vol 50 (8) ◽  
pp. 3098-3101 ◽  
Author(s):  
Anna Kucinska ◽  
Aleksandra Cyganiuk ◽  
Jerzy P. Lukaszewicz
Keyword(s):  
Heat Treatment ◽  
Surface Area ◽  
Active Carbon ◽  
High Surface ◽  
High Surface Area

scholarly journals Synthesis, characterization of Silica Obtained from Rice Husk and Determination its Silica Content by Modified Volumetric Method

2016 ◽  
Vol 11 (2) ◽  
pp. 93 ◽  
Author(s):  
Nijhuma Kayal ◽  
Nahar Singh
Keyword(s):  
Heat Treatment ◽  
Surface Area ◽  
Rice Husk ◽  
High Surface ◽  
High Surface Area ◽  
Atomic Emission ◽  
Silica Content ◽  
Volumetric Method ◽  
Trace Impurities ◽  
Pure Silica

<p>The objective of the work was to develop pure silica with high surface area from rice husk by chemical and heat treatment. The silica samples were characterized in terms of chemical composition, particle size distribution, morphology and surface area. The amount of silica was determined by a modified volumetric method. The trace impurities in silica were quantitatively determined by inductive coupled plasma atomic emission spectroscopy (ICP-AES). A 99% silica powder with surface area 282 m<sup>2</sup>/gm could be produced by chemical and heat treatment at 1000 ºC for 2 h.</p>

Nanoporous photocatalysts developed through heat-driven stacking of graphitic carbon nitride nanosheets

RSC Advances ◽  
2015 ◽  
Vol 5 (18) ◽  
pp. 14027-14033 ◽  
Author(s):  
Zhijun Huang ◽  
Fengbo Li ◽  
Bingfeng Chen ◽  
Guoqing Yuan
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Photocatalytic Activity ◽  
Surface Area ◽  
Carbon Nitride ◽  
High Surface ◽  
High Surface Area ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Carbon Nitride Nanosheets

Nanostructured g-C3N4 with high surface area from heat treatment of guanidinium cyanurate exhibits better optical properties and enhanced photocatalytic activity.

Nanocomposite aerogels: The SiO2–Al2O3 system

1993 ◽  
Vol 8 (12) ◽  
pp. 3163-3167 ◽  
Author(s):  
Sridhar Komarneni ◽  
Rustum Roy ◽  
Ulagaraj Selvaraj ◽  
Prakash B. Malla ◽  
Else Breval
Keyword(s):  
Heat Treatment ◽  
Surface Area ◽  
High Temperatures ◽  
High Surface ◽  
High Surface Area ◽  
Single Component ◽  
Second Phase ◽  
Surface Areas

Monolithic nanocomposite aerogels of two aluminosilicate compositions have been prepared and characterized by different techniques. The results show that high surface area and mesoporosity can be preserved in the above nanocomposite aerogels by heating at 1000 °C, unlike the single component aerogels. The presence of alumina as a second phase prevented their densification which resulted in surface areas on the order of 500–600 m2/g and mesopores of about 5–6 nm in diameter after heat treatment at 1000 °C. These novel nanocomposite aerogels are expected to find applications at high-temperatures in separations, insulation, catalysis, etc.

scholarly journals More sustainable energy storage: lignin based electrodes with glyoxal crosslinking

2017 ◽  
Vol 5 (46) ◽  
pp. 24344-24352 ◽  
Author(s):  
S. Chaleawlert-umpon ◽  
C. Liedel
Keyword(s):  
Energy Storage ◽  
Surface Area ◽  
Active Carbon ◽  
Sustainable Energy ◽  
High Surface ◽  
High Surface Area ◽  
Improved Performance

Crosslinking lignin on high surface area active carbon using glyoxal as a green crosslinker leads to truly sustainable electrodes with improved performance.

Tenacious Mass Transfer Limitations Drive Catalytic Selectivity during Electrochemical Carbon Dioxide Reduction

2019 ◽  
Author(s):  
Kailun Yang ◽  
Recep Kas ◽  
Wilson A. Smith
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Catalyst Layer ◽  
Active Surface ◽  
Active Surface Area ◽  
High Concentration ◽  
Copper Electrodes ◽  
Surface Enhanced ◽  
Local Current

<p>This study evaluated the performance of the commonly used strong buffer electrolytes, i.e. phosphate buffers, during CO<sub>2</sub> electroreduction in neutral pH conditions by using in-situ surface enhanced infrared absorption spectroscopy (SEIRAS). Unfortunately, the buffers break down a lot faster than anticipated which has serious implications on many studies in the literature such as selectivity and kinetic analysis of the electrocatalysts. Increasing electrolyte concentration, surprisingly, did not extend the potential window of the phosphate buffers due to dramatic increase in hydrogen evolution reaction. Even high concentration phosphate buffers (1 M) break down within the potentials (-1 V vs RHE) where hydrocarbons are formed on copper electrodes. We have extended the discussion to high surface area electrodes by evaluating electrodes composed of copper nanowires. We would like highlight that it is not possible to cope with high local current densities on these high surface area electrodes by using high buffer capacity solutions and the CO<sub>2</sub> electrocatalysts are needed to be evaluated by casting thin nanoparticle films onto inert substrates as commonly employed in fuel cell reactions and up to now scarcely employed in CO<sub>2</sub> electroreduction. In addition, we underscore that normalization of the electrocatalytic activity to the electrochemical active surface area is not the ultimate solution due to concentration gradient along the catalyst layer.This will “underestimate” the activity of high surface electrocatalyst and the degree of underestimation will depend on the thickness, porosity and morphology of the catalyst layer. </p> <p> </p>

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