Facile, Single-Step Preparation of Versatile, High-Surface-Area, Hierarchically Structured Hybrid Materials

2011 ◽  
Vol 123 (20) ◽  
pp. 4688-4692 ◽  
Author(s):  
Ivo Nischang ◽  
Oliver Brüggemann ◽  
Ian Teasdale
Keyword(s):  
Surface Area ◽  
Hybrid Materials ◽  
High Surface ◽  
High Surface Area ◽  
Single Step

Facile Synthesis of Activated Carbon from Swamp Taro Stalk via Single Step ZnCl2 Activation

2016 ◽  
Vol 857 ◽  
pp. 475-479 ◽  
Author(s):  
M.S. Mohammed Yahya ◽  
Jeyashelly Andas ◽  
Ghani Zaidi Ab
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Total Pore Volume ◽  
Structure Type ◽  
Sem Analysis ◽  
Single Step ◽  
Bet Surface Area ◽  
Type Iv

In this work, mesoporous activated carbon with high surface area was synthesized from swamp taro stalk by single step ZnCl2 activation. The synthesized activated carbon was characterized by Na2S2O3 volumetric method, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscope (SEM) and N2 adsorption-desorption analyses. Under the single step ZnCl2 activation, the registered iodine number, BET surface area, total pore volume and pore diameter were 1087.57 mgg-1, 1242.26 m2g-1, 0.73cm3g-1 and 3.72 nm respectively with yield of 25.34%. SEM analysis evidenced the well-formation of porous structure. Type IV isotherm with H2 loops obtained from N2-sorption studies indicates the ink bottles shape mesoporous network structure. This research proved the successful conversion of plant waste into high grade activated carbon.

Unique perforated graphene derived from Bougainvillea flowers for high-power supercapacitors: a green approach

Nanoscale ◽  
2017 ◽  
Vol 9 (14) ◽  
pp. 4801-4809 ◽  
Author(s):  
Rajendra P. Panmand ◽  
Purnima Patil ◽  
Yogesh Sethi ◽  
Sunil R. Kadam ◽  
Milind V. Kulkarni ◽  
...  
Keyword(s):  
Surface Area ◽  
High Power ◽  
High Surface ◽  
High Surface Area ◽  
Single Step ◽  
Step Method ◽  
Green Approach ◽  
Template Free ◽  
First Time

Herein, we demonstrated a green approach for the synthesis of high surface area (850 m2 g−1) mesoporous perforated graphene (PG) from Bougainvillea flower for the first time using a template free single-step method.

Electron Field Emission from Graphitic Nanoflakes Grown Over Vertically Aligned Carbon Nanotubes

2008 ◽  
Vol 8 (8) ◽  
pp. 4309-4313 ◽  
Author(s):  
S. Chhoker ◽  
S. K. Arora ◽  
P. Srivastava ◽  
V. D. Vankar
Keyword(s):  
Carbon Nanotubes ◽  
Surface Area ◽  
Field Emission ◽  
Deposition Time ◽  
Microwave Plasma ◽  
High Surface ◽  
Carbon Film ◽  
High Surface Area ◽  
Carbon Films ◽  
Single Step

Single step growth of self-assembled graphitic nanoflakes (GNF) over carbon nanotubes (CNT) on iron coated silicon(100) substrates is reported. These nanostructures were grown by varying the deposition time in a microwave plasma enhanced chemical vapor deposition reactor using acetylene, hydrogen and argon as reactant gases. Scanning electron microscope (SEM) studies of the deposited carbon films revealed that with increase in deposition time from 3 minutes to 6 minutes, the surface topography of the films transformed from one dimensional cylindrical nanostructure to flat-shaped two-dimensional nanoflakes. Carbon film deposited for 5 minutes showed improved surface coverage as compared to films deposited for 6 minutes i.e., surface area of the CNT film covered with nanoflakes increased as compared to carbon film deposited for higher durations. Field emission studies of films deposited at 5 minutes and 6 minutes showed increase in turn-on field, required for electron emission, from 2.7 V/μm to 2.9 V/μm respectively. However, such a combination of one dimension carbon and two dimension carbon may prove useful in applications where high surface area films are required.

Single step synthesis of activated bio-carbons with a high surface area and their excellent CO2 adsorption capacity

Carbon ◽  
2017 ◽  
Vol 116 ◽  
pp. 448-455 ◽  
Author(s):  
Gurwinder Singh ◽  
In Young Kim ◽  
Kripal S. Lakhi ◽  
Prashant Srivastava ◽  
Ravi Naidu ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
Co2 Adsorption ◽  
High Surface ◽  
High Surface Area ◽  
Single Step ◽  
Co2 Adsorption Capacity

Organic-Silica Hybrid Materials Consisting of the Double Four-Ring Silicate Structure as a Building Block

1994 ◽  
Vol 346 ◽  
Author(s):  
Isao Hasegawa ◽  
Masanori Ishida ◽  
Seijl Motojima ◽  
Shigeo Satokawa
Keyword(s):  
Surface Area ◽  
Hybrid Materials ◽  
Building Block ◽  
High Surface ◽  
High Surface Area ◽  
Bet Surface Area ◽  
Reaction Conditions ◽  
Silicate Structure ◽  
Organic Silica ◽  
Silica Hybrid

ABSTRACTCopolymerization of the cubic octameric silicate anion (Si8O208-) with dimethyldichlorosilane in 2, 2-dimethoxypropane has yielded organic-silica hybrid materials consisting of the S13O20 structure as a building block. The hybrid materials have shown high surface area by calcination in air. The reaction conditions have been optimized to produce the materials with higher specific surface area. As a result, the hybrid materials with BET surface area of 406 m2 g-1 have been obtained.

scholarly journals Isoreticular expansion of polyMOFs achieves high surface area materials

2017 ◽  
Vol 53 (77) ◽  
pp. 10684-10687 ◽  
Author(s):  
Giulia E. M. Schukraft ◽  
Sergio Ayala ◽  
Benjamin L. Dick ◽  
Seth M. Cohen
Keyword(s):  
Surface Area ◽  
Hybrid Materials ◽  
High Surface ◽  
High Surface Area ◽  
Surface Areas ◽  
High Surface Area Materials ◽  
Enhanced Stability

Polymer–MOF hybrid materials (polyMOFs) are shown to adhere to the principle of isoreticular expansion, generating polyMOFs with large surface areas and enhanced stability.

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>

scholarly journals Rugae-like FeP nanocrystal assembly on a carbon cloth: an exceptionally efficient and stable cathode for hydrogen evolution

Nanoscale ◽  
2015 ◽  
Vol 7 (25) ◽  
pp. 10974-10981 ◽  
Author(s):  
Xiulin Yang ◽  
Ang-Yu Lu ◽  
Yihan Zhu ◽  
Shixiong Min ◽  
Mohamed Nejib Hedhili ◽  
...  
Keyword(s):  
Gas Phase ◽  
Surface Area ◽  
Hydrogen Evolution ◽  
Hydrogen Generation ◽  
High Surface ◽  
High Surface Area ◽  
Catalytic Efficiency ◽  
Carbon Cloth ◽  
Nanocrystal Assembly

High surface area FeP nanosheets on a carbon cloth were prepared by gas phase phosphidation of electroplated FeOOH, which exhibit exceptionally high catalytic efficiency and stability for hydrogen generation.

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