APTES grafted ordered mesoporous silica KIT-6 for CO2 adsorption

Kishor, Rupak; Ghoshal, Aloke Kumar

doi:10.1016/j.cej.2014.10.039

Cited by 157 publications

(77 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Specifically, although the aerogel was initially impregnated with metal ions, the diffusion of the reducing agent may have led to a skin-core structure thus forming a denser network on the edge of the monoliths. This phenomenon may have been enhanced for the MPTMS samples since smaller channels were made available for liquid and ion diffusion due to the thickness of the grafted layer as previously reported for other type of silane grafting across silica matrixes23. However, above 1 M of AgNO 3 , the particle size was found to increase dramatically likely due to the quicker nucleation and high contacting chance between already formed particles and ions at higher Ag + concentrations24.…”

Section: Resultsmentioning

confidence: 59%

Silver metal nano-matrixes as high efficiency and versatile catalytic reactors for environmental remediation

Dumée

Tardy

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Nano-porous metallic matrixes (NMMs) offer superior surface to volume ratios as well as enhanced optical, photonic, and electronic properties to bulk metallic materials. Such behaviours are correlated to the nano-scale inter-grain metal domains that favour the presence of electronic vacancies. In this work, continuous 3D NMMs were synthesized for the first time through a simple diffusion-reduction process whereby the aerogel matrix was functionalized with (3-Mercaptopropyl)trimethoxysilane. The surface energy of the silica monolith templates was tuned to improve the homogeneity of the reduction process while thiol functionalization facilitated the formation of a high density of seeding points for metal ions to reduce. The diameter of NMMs was between 2 and 1000 nm, corresponding to a silver loading between 1.23 and 41.16 at.%. A rates of catalytic degradation kinetics of these NMMS which is three orders of magnitude higher than those of the non-functionalized silver-silica structures. Furthermore, the enhancement in mechanical stability at nanoscale which was evaluated by Atomic Force Microscopy force measurements, electronic density and chemical inertness was assessed and critically correlated to their catalytic potential. This strategy opens up new avenues for design of complex architectures of either single or multi-metal alloy NMMs with enhanced surface properties for various applications.

show abstract

Section: Resultsmentioning

confidence: 59%

Silver metal nano-matrixes as high efficiency and versatile catalytic reactors for environmental remediation

Dumée

Tardy

et al. 2017

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Additionally, in a previous work, the present study’s authors have reported the loss of APTES by TGA in an N 2 atmosphere [38], and another group has showed that there is little change in the TG profile of grafted silica nanoparticles done under O 2 , although the final mass loss content did not present a significant difference [39]. …”

Section: Resultsmentioning

confidence: 71%

Response of Fibroblasts MRC-5 to Flufenamic Acid-Grafted MCM-41 Nanoparticles

et al. 2018

View full text Add to dashboard Cite

Recently, flufenamic acid (FFA) was discovered among fenamates as a free radical scavenger and gap junction blocker; however, its effects have only been studied in cancer cells. Normal cells in the surroundings of a tumor also respond to radiation, although they are not hit by it directly. This phenomenon is known as the bystander effect, where response molecules pass from tumor cells to normal ones, through communication channels called gap junctions. The use of the enhanced permeability and retention effect, through which drug-loaded nanoparticles smaller than 200 nm may accumulate around a tumor, can prevent the local side effect upon controlled release of the drug. The present work, aimed at functionalizing MCM-41 (Mobil Composition of Matter No. 41) silica nanoparticles with FFA and determining its biocompatibility with human fibroblasts MRC-5 (Medical Research Council cell strain 5). MCM-41, was synthesized and characterized structurally and chemically, with multiple techniques. The biocompatibility assay was performed by Live/Dead technique, with calcein and propidium–iodide. MRC-5 cells were treated with FFA-grafted MCM-41 for 48 h, and 98% of cells remained viable, without signs of necrosis or morphological changes. The results show the feasibility of MCM-41 functionalization with FFA, and its potential protection of normal cells, in comparison to the role of FFA in cancerous ones.

show abstract

“…From Table , the pore diameter of poly (SSA‐NVI)/KIT‐6 is 7 nm. However, after the incorporation of metal nanoparticles, it is enhanced to 8 nm in Ni‐Pd@poly (SSA‐NVI)/KIT‐6, which it can be related to the physical pressure of these nanoparticles from inside to the wall of the pores . In addition, the MP‐plot and t‐plot confirm the existence of micropores beside of the mesopores for both poly (SSA‐NVI)/KIT‐6 and Ni‐Pd@poly (SSA‐NVI)/KIT‐6 (Table ), and also the diameters of micropores are equal for these samples, which shows that the Ni‐Pd nanoparticles are just placed into the mesopores.…”

Section: Resultsmentioning

confidence: 97%

Synthesis of multifunctional polymer containing Ni‐Pd NPs via thiol‐ene reaction for one‐pot cascade reactions

Kalbasi

Mesgarsaravi

Gharibi

2019

Applied Organom Chemis

View full text Add to dashboard Cite

Recently, acid–base bifunctional catalysts have been considered due to their abilities, such as the simultaneous activation of electrophilic and nucleophilic species and their high importance in organic syntheses. However, the synthesis of acid–base catalysts is problematic due to the neutralization of acidic and basic groups. This work reports a facial approach to solve this problem via the synthesis of a novel bifunctional polymer using inexpensive materials and easy methods. In this way, at the first step, heterogeneous poly (styrene sulfonic acid‐n‐vinylimidazole) containing pentaerythritol tetra‐(3‐mercaptopropionate) (PETMP) and trimethylolpropane trimethacrylate (TMPTMA) cross‐linkers were synthesized in the pores of a mesoporous silica structure using click reaction as a novel bifunctional acid–base catalyst. After that, Ni‐Pd nanoparticles supported on poly (styrenesulfonic acid‐n‐vinylimidazole)/KIT‐6 as a novel trifunctional heterogeneous acid–base‐metal catalyst was prepared. The prepared catalysts were characterized by various techniques like FT‐IR, TGA, ICP‐AES, DRS‐UV, TEM, FE‐SEM, EDS‐Mapping, and XRD. The synthesized catalysts were efficiently used as bifunctional/trifunctional catalysts for one‐pot, deacetalization‐Knoevenagel condensation and one‐pot, three‐step and a sequential reaction containing deacetalization‐Knoevenagel condensation‐reduction reaction. It is important to note that the synthesized catalyst showing high chemo‐selectivity for the reduction of nitro group, alkenyl double bond and ester group in the presence of nitrile. Moreover, it was found that the different nanoparticles including Ni, Pd, and alloyed Ni‐Pd showing different chemo‐selectivity and catalytic activity in the reaction.

show abstract

APTES grafted ordered mesoporous silica KIT-6 for CO2 adsorption

Cited by 157 publications

References 53 publications

Silver metal nano-matrixes as high efficiency and versatile catalytic reactors for environmental remediation

Silver metal nano-matrixes as high efficiency and versatile catalytic reactors for environmental remediation

Response of Fibroblasts MRC-5 to Flufenamic Acid-Grafted MCM-41 Nanoparticles

Synthesis of multifunctional polymer containing Ni‐Pd NPs via thiol‐ene reaction for one‐pot cascade reactions

Contact Info

Product

Resources

About