Hydrothermal fabrication of triazine-functionalized covalent organic polymer enfolded alginate biocomposite beads for Cr(vi) removal from water

2020 ◽  
Vol 6 (3) ◽  
pp. 851-863 ◽  
Author(s):  
Soodamani Periyasamy ◽  
Mu. Naushad ◽  
Natrayasamy Viswanathan
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Tolerance Limit ◽  
Organic Polymer ◽  
Organic Polymers

Covalent organic polymers (COPs) possesses high surface area and porosity. The synthesised triazine COP blended alginate (TCOP@Alg) biocomposite beads used for Cr(vi) removal. TCOP@Alg beads reduces field chromium water to below tolerance limit.

scholarly journals New Porous Silicon-Containing Organic Polymers: Synthesis and Carbon Dioxide Uptake

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1488
Author(s):  
Safaa H. Mohamed ◽  
Ayad S. Hameed ◽  
Emad Yousif ◽  
Mohammad Hayal Alotaibi ◽  
Dina S. Ahmed ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Area ◽  
Pore Volume ◽  
High Surface ◽  
High Surface Area ◽  
Organic Polymers ◽  
Average Pore ◽  
Carbon Dioxide Uptake ◽  
Design And Synthesis ◽  
The One

The design and synthesis of new multifunctional organic porous polymers has attracted significant attention over the years due to their favorable properties, which make them suitable for carbon dioxide storage. In this study, 2-, 3-, and 4-hydroxybenzaldehyde reacted with phenyltrichlorosilane in the presence of a base, affording the corresponding organosilicons 1–3, which further reacted with benzidine in the presence of glacial acetic acid, yielding the organic polymers 4–6. The synthesized polymers exhibited microporous structures with a surface area of 8.174–18.012 m2 g−1, while their pore volume and total average pore diameter ranged from 0.015–0.035 cm3 g−1 and 1.947–1.952 nm, respectively. In addition, among the synthesized organic polymers, the one with the meta-arrangement structure 5 showed the highest carbon dioxide adsorption capacity at 323 K and 40 bar due to its relatively high surface area and pore volume.

High surface area hypercrosslinked microporous organic polymer networks based on tetraphenylethylene for CO2 capture

2014 ◽  
Vol 2 (21) ◽  
pp. 8054-8059 ◽  
Author(s):  
Shuwen Yao ◽  
Xiao Yang ◽  
Miao Yu ◽  
Yinghua Zhang ◽  
Jia-Xing Jiang
Keyword(s):  
Surface Area ◽  
Co2 Capture ◽  
High Surface ◽  
Polymer Networks ◽  
High Surface Area ◽  
Organic Polymer

A series of hypercrosslinked microporous organic copolymer networks was synthesized via Friedel–Crafts alkylation of tetraphenylethylene (TPE) and/or 1,1,2,2-tetraphenylethane-1,2-diol (TPD) promoted by anhydrous FeCl3.

Polymer-Silica Nanocomposite Aerogels with Enhanced Mechanical Properties Using Chemical Vapor Deposition (CVD) of Cyanoacrylates

2007 ◽  
Vol 1007 ◽  
Author(s):  
Dylan J. Boday ◽  
Douglas A. Loy ◽  
Kimberley A. DeFriend ◽  
Kennard V. Wilson ◽  
David Coder
Keyword(s):  
Mechanical Properties ◽  
Chemical Vapor Deposition ◽  
Surface Area ◽  
Vapor Deposition ◽  
High Surface ◽  
High Surface Area ◽  
Chemical Vapor ◽  
Fold Increase ◽  
Silica Aerogels ◽  
Organic Polymer

ABSTRACTAerogels were structurally modified using chemical vapor deposition (CVD) of cyanoacrylate monomers to afford polycyanoacrylate-aerogel nanocomposites. Silica aerogels are low density, high surface area materials whose applications are limited by their fragility. Cyanoacrylate CVD allowed us to deposit a film of organic polymer throughout fragile porous monoliths within hours. Our experiments have shown that polymerization of the cyanoacrylate monomers was initiated by the adsorbed water on the surface of the silica permitting the nanocomposites structures to be formed with little or no sample preparation. We found that the strength of the polycyanoacrylate-aerogel nanocomposites increased thirty two-fold over the untreated aerogels with only a three-fold increase in density and an eight-fold decrease in surface area. Along with the improvement in mechanical properties, the aerogels became less hydrophilic than un-modified aerogels. Polycyanoacrylate-coated aerogels were placed directly into water and did not suffer catastrophic fragmentation as observed with un-modified silica aerogels.

Remarkable gas adsorption by carbonized nitrogen-rich hypercrosslinked porous organic polymers

2014 ◽  
Vol 2 (36) ◽  
pp. 15139-15145 ◽  
Author(s):  
Xiao Yang ◽  
Miao Yu ◽  
Yang Zhao ◽  
Chong Zhang ◽  
Xiaoyan Wang ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Surface Area ◽  
Gas Adsorption ◽  
High Surface ◽  
High Surface Area ◽  
Organic Polymer ◽  
High Carbon ◽  
Porous Organic Polymer ◽  
Carbon Dioxide Uptake ◽  
High Carbon Dioxide

Carbonized materials from a nitrogen-rich hypercrosslinked porous organic polymer exhibit a high surface area of 2065 m2 g−1 and an exceptionally high carbon dioxide uptake up to 6.51 mmol g−1 (1.13 bar/273 K).

scholarly journals Increasing surface area and CO2 uptake of conjugated microporous polymers via a post-knitting method

2021 ◽  
Author(s):  
Yuchuan Liu ◽  
Shun Wang ◽  
Xianyu Meng ◽  
Yu Ye ◽  
Xiaowei Song ◽  
...  
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Large Surface Area ◽  
Co2 Uptake ◽  
Organic Polymers ◽  
Porous Organic Polymers ◽  
Microporous Polymers ◽  
And Storage ◽  
Conjugated Microporous Polymers

Synthesis of high-surface-area porous organic polymers (POPs) for CO2 capture and storage (CCS) has obtained much attentions from researchers. However, construction of POPs with large surface area still remains challenging...

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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