scholarly journals Rapid Synthesis of High Surface Area Imine‐Linked 2D Covalent Organic Frameworks by Avoiding Pore Collapse During Isolation

2019 ◽  
Vol 32 (2) ◽  
pp. 1905776 ◽  
Author(s):  
Cameron H. Feriante ◽  
Samik Jhulki ◽  
Austin M. Evans ◽  
Raghunath R. Dasari ◽  
Kaitlin Slicker ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Covalent Organic Frameworks ◽  
Pore Collapse ◽  
Rapid Synthesis

Microwave-Assisted Rapid Synthesis of Platinum Nanoclusters with High Surface Area

2010 ◽  
Vol 10 (10) ◽  
pp. 6489-6494 ◽  
Author(s):  
Hongjing Wang ◽  
Liang Wang ◽  
Yoshihiro Nemoto ◽  
Norihiro Suzuki ◽  
Yusuke Yamauchi
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Rapid Synthesis ◽  
Microwave Assisted ◽  
Platinum Nanoclusters

Rapid synthesis of high surface area anatase Titanium Oxide quantum dots

2014 ◽  
Vol 40 (8) ◽  
pp. 12675-12680 ◽  
Author(s):  
Rehan Danish ◽  
Faheem Ahmed ◽  
Bon Heun Koo
Keyword(s):  
Quantum Dots ◽  
Surface Area ◽  
Titanium Oxide ◽  
High Surface ◽  
High Surface Area ◽  
Rapid Synthesis

Mixing Does the Magic: A Rapid Synthesis of High Surface Area Noble Metal Nanosponges Showing Broadband Nonlinear Optical Response

ACS Nano ◽  
2010 ◽  
Vol 4 (5) ◽  
pp. 2681-2688 ◽  
Author(s):  
Katla Sai Krishna ◽  
C. S. Suchand Sandeep ◽  
Reji Philip ◽  
Muthusamy Eswaramoorthy
Keyword(s):  
Surface Area ◽  
Noble Metal ◽  
Nonlinear Optical ◽  
High Surface ◽  
High Surface Area ◽  
Optical Response ◽  
Nonlinear Optical Response ◽  
Rapid Synthesis

scholarly journals Enhanced Surface Area and Reduced Pore Collapse of Methylated, Imine-Linked Covalent Organic Frameworks

Nanoscale ◽  
2021 ◽  
Author(s):  
Ellen Dautzenberg ◽  
Milena Lam ◽  
Guanna Li ◽  
Louis de Smet
Keyword(s):  
Energy Storage ◽  
Surface Area ◽  
Gas Separation ◽  
High Surface ◽  
Nanoporous Materials ◽  
Covalent Organic Frameworks ◽  
Pore Collapse ◽  
Surface Areas ◽  
Enhanced Surface

Covalent Organic Frameworks (COFs) are thermally and chemically stable, nanoporous materials with high surface areas, making them interesting for a large variety of applications including energy storage, gas separation, catalysis...

Fabrication of SiO2@COF5 microspheres and their application in high performance liquid chromatography

2018 ◽  
Vol 10 (17) ◽  
pp. 1968-1976 ◽  
Author(s):  
Shulei Wang ◽  
Lingyi Zhang ◽  
Ruili Xiao ◽  
Haihong Chen ◽  
Zhanying Chu ◽  
...  
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Surface Area ◽  
High Performance ◽  
Stationary Phases ◽  
High Surface ◽  
High Surface Area ◽  
Covalent Organic Frameworks ◽  
Structural Regularity ◽  
Adsorption Affinity

The structural regularity, atomically precise design, high surface area and adsorption affinity make covalent-organic frameworks (COFs) attractive as novel stationary phases in chromatography.

Intercalation of First Row Transition Metals inside Covalent-Organic Frameworks (COF): a Strategy to Fine Tune the Electronic Properties of Porous Crystalline Materials

2018 ◽  
Author(s):  
Srimanta Pakhira ◽  
Jose Mendoza-Cortes
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Electronic Properties ◽  
High Surface ◽  
Electronic Devices ◽  
High Surface Area ◽  
Main Role ◽  
Covalent Organic Frameworks ◽  
Porous Network ◽  
Crystalline Materials

<div>Covalent organic frameworks (COFs) have emerged as an important class of nano-porous crystalline materials with many potential applications. They are intriguing platforms for the design of porous skeletons with special functionality at the molecular level. However, despite their extraordinary properties, it is difficult to control their electronic properties, thus hindering the potential implementation in electronic devices. A new form of nanoporous material, COFs intercalated with first row transition metal is proposed to address this fundamental drawback - the lack of electronic tunability. Using first-principles calculations, we have designed 31 new COF materials <i>in-silico</i> by intercalating all of the first row transition metals (TMs) with boroxine-linked and triazine-linked COFs: COF-TM-x (where TM=Sc-Zn and x=3-5). This is a significant addition considering that only 187 experimentally COFs structures has been reported and characterized so far. We have investigated their structure and electronic properties. Specifically, we predict that COF's band gap and density of states (DOSs) can be controlled by intercalating first row transition metal atoms (TM: Sc - Zn) and fine tuned by the concentration of TMs. We also found that the $d$-subshell electron density of the TMs plays the main role in determining the electronic properties of the COFs. Thus intercalated-COFs provide a new strategy to control the electronic properties of materials within a porous network. This work opens up new avenues for the design of TM-intercalated materials with promising future applications in nanoporous electronic devices, where a high surface area coupled with fine-tuned electronic properties are desired.</div>

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>

Sign in / Sign up

Export Citation Format

Share Document