Stepwise growth of melamine-based dendrimers into mesopores and their CO2 adsorption properties

Liang, Zhijian; Fadhel, Bandar Abdullah; Schneider, Casper James; Chaffee, Alan L.

doi:10.1016/j.micromeso.2007.08.030

Cited by 104 publications

(89 citation statements)

References 20 publications

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“…It was confirmed that the overall ordered structure of the mesoporous silica was not seriously perturbed. The intensities of the XRD peaks for NH 2 -magMCM-48 and MDA-mag-MCM-48 were substantially lower than those measured for magMCM-48, which was probably caused by the pore filling effect of the magMCM-48 channels [31].…”

Section: Resultsmentioning

confidence: 64%

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Anbia

Khoshbooei

2014

J Nanostruct Chem

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A novel adsorbent with magnetic Fe 3 O 4 nanoparticles and melamine-based dendrimer amine functionalized mesoporous silica (MDA-magMCM-48) has been developed which would not destroy the pore structure and could supply a convenient way for separation of the adsorbent from water. The obtained adsorbent was characterized by XRD, SEM, TEM, FTIR, TGA and N 2 adsorptiondesorption isotherm. The objective of this study was to evaluate the effectiveness of mesoporous MDA-magMCM-48 material for the sorption of 4-chlorophenol (4-CP) and 4-bromophenol (4-BP). The effects of various operating parameters such as initial concentration, pH of the solution and contact time were thoroughly studied. From the sorption studies it is observed that the uptake of 4-CP (239.55 mg/g) was higher than that of 4-BP (222.9 mg/g). The Freundlich and Langmuir adsorption isotherms are used to model the equilibrium adsorption data.

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Section: Resultsmentioning

confidence: 64%

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Anbia

Khoshbooei

2014

J Nanostruct Chem

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“…The chlorine atom in cyanuric chloride was easily replaced by the amine group of the EDA molecule, and the DIPEA trap that HCl formed during the substitution reaction. Then, the mixture was filtered by Büchner funnel, and the solid was rinsed sequentially by dried methanol, dichloromethane and tetrahydrofuran (Liang et al 2008). The solid was transferred back into a clean flask containing a mixture of EDA (4 mL), dissolved in dried tetrahydrofuran (300 mL) and refluxed for 24 h at 0°C.…”

Section: Synthesis Of Mda-mcn-1mentioning

confidence: 99%

“…N-H stretching bands can be observed at 3124-3500 cm -1 . The bands at 2813 and 2661 cm -1 correspond to CH 2 groups (Liang et al 2008). …”

Section: Structural and Textural Propertiesmentioning

confidence: 99%

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

Anbia

Haqshenas

2015

Int. J. Environ. Sci. Technol.

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Mesoporous carbon nitride functionalized with melamine-based dendrimer amine has been developed. It has been characterized using N 2 adsorption-desorption isotherm, thermogravimetric analysis, Fourier transform spectroscopy and small-angle X-ray scattering techniques. The pore diameter is centered at 4.74 nm with a relatively high BET surface area of 102.2 m 2 /g with a pore volume of 0.12 cm 3 /g. Thermogravimetric analysis curves show that the samples (mesoporous carbon nitride and mesoporous carbon nitride functionalized with melamine-based dendrimer amine) have high thermal stability compared to the earlier species. Batch adsorption experiments were conducted to study the effect of adsorbent dose, temperature, contact time and solution pH for the removal of Pb(II) from aqueous systems. The Pb(II) and Cu(II) removal by mesoporous carbon nitride functionalized with melaminebased dendrimer amine was found to be 196.34 and 199.75 mg/g, respectively. The sorption data are correlated better with the Langmuir adsorption isotherm than Freundlich isotherm. The kinetic analysis has revealed that the overall adsorption process is successfully fitted in the pseudo-second-order kinetic model.

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“…% organic loadings could be achieved (fourth generation) leading to a substantially higher CO 2 adsorption (4.0 wt. % at 20°C and 90% CO 2 -10% Ar) as compared with the bare support (Liang et al, 2008(Liang et al, , 2009). Jones et al reported a hyperbranched aminosilica (HAS) material for CO 2 capture that was synthesized by surface polymerization of aziridine initiated by the silanols on the surface of SBA-15, the resultant adsorbent exhibited a CO 2 uptake of ca.…”

Section: Classmentioning

confidence: 96%

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

et al. 2015

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CO 2 capture represents the key technology for CO 2 reduction within the framework of CO 2 capture, utilization, and storage (CCUS). In fact, the implementation of CO 2 capture extends far beyond CCUS since it will link the CO 2 emission and recycling sectors, and when renewables are used to provide necessary energy input, CO 2 capture would enable a profitable zero-or even negative-emitting and integrated energy-chemical solution. To this end, highly efficient CO 2 capture technologies are needed, and adsorption using solid adsorbents has the potential to be one of the ideal options. Currently, the greatest challenge in this area is the development of adsorbents with high performance that balances a range of optimization-needed factors, those including costs, efficiency, and engineering feasibility. In this review, recent advances on the development of carbon-based and immobilized organic amines-based CO 2 adsorbents are summarized, the selection of these particular categories of materials is because they are among the most developed low-temperature (<100°C) CO 2 adsorbents up to date, which showed important potential for practical deployment at pilot-scale in the near future. Preparation protocols, adsorption behaviors as well as pros and cons of each type of the adsorbents are presented, it was concluded that encouraging results have been achieved already, however, the development of more effective adsorbents for CO 2 capture remains challenging and further innovations in the design and synthesis of adsorbents are needed.Keywords: CCUS, CO 2 capture, adsorption, energy, material science INTRODUCTION CO 2 CAPTURE AND AN INTEGRATED ENERGY-CHEMICAL SOLUTIONThe atmospheric CO 2 concentration now exceeds 400 ppm (CO2Now.org, 2014), and its continuous increase is believed to be the major factor leading to global warming and climatic change (Crowley, 2000;Held and Soden, 2000;Patz et al., 2005). Kaya et al. and Hoffert et al. have quantified net CO 2 emissions in terms of population, economic activity, and energy-related factors using Eq. 1 (Kaya, 1995;Hoffert et al., 1998).where C is the net CO 2 emission, P is population, GDP is the gross domestic product that is used here as an indicator of economyrelated factor, and E is energy production. Therefore, GDP/P is the Per capita GDP, and E/GDP can be regarded as the energy intensity during production that is closely related to the efficiency of energy utilization. The last term, C/E, represents the carbon intensity during energy production. As for the development of the human society and life quality, it is improper to limit population and production, which means there is no solution to CO 2 reduction from the first and second term in Eq. 1. On the other hand, increase in the energy production/utilization efficiency and control of the carbon footprint during energy processes are the major strategies for CO 2 sequestration (third and fourth term in Eq. 1). The complete decarbonization of energy is believed to be the ultimate solution for the long-term sustainability, ...

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Stepwise growth of melamine-based dendrimers into mesopores and their CO2 adsorption properties

Cited by 104 publications

References 20 publications

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Functionalized magnetic MCM-48 nanoporous silica by cyanuric chloride for removal of chlorophenol and bromophenol from aqueous media

Adsorption studies of Pb(II) and Cu(II) ions on mesoporous carbon nitride functionalized with melamine-based dendrimer amine

Solid Adsorbents for Low-Temperature CO2 Capture with Low-Energy Penalties Leading to More Effective Integrated Solutions for Power Generation and Industrial Processes

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