scholarly journals Synthesis and use of carvedilol metal complexes as carbon dioxide storage media

2020 ◽  
Vol 10 (3) ◽  
pp. 157-164
Author(s):  
Omar G. Mousa ◽  
Emad Yousif ◽  
Ahmed A. Ahmed ◽  
Gamal A. El‐Hiti ◽  
Mohammad Hayal Alotaibi ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Metal Complexes ◽  
Copper Complexes ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Carbon Dioxide Storage ◽  
Small Surface ◽  
Carbon Dioxide Uptake ◽  
Storage Media ◽  
Adsorption Desorption

Abstract The consequences of increased fossil fuel consumption on the environment presents a challenge. Carbon dioxide capture is a useful technique to reduce global warming. Therefore, three carvedilol metal (nickel, cobalt, and copper) complexes were synthesized as potential carbon dioxide storage media. The structural and textural properties of metal carvedilol complexes have been established using various techniques. The metal complexes have mesoporous structures in which pore size was approximately 3 nm. Particle size ranged from 51.0 to 393.9 nm with a relatively small surface area (6.126–9.073 m2/g). The carvedilol metal complexes have either type-III or IV nitrogen adsorption–desorption isotherm. The complexes showed reasonable capacity towards carbon dioxide uptake (up to 18.21 cm3/g) under the optimized condition (40 bar and 323 K). Graphical Abstract

scholarly journals Synthesis and Use of Valsartan Metal Complexes as Media for Carbon Dioxide Storage

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1183 ◽  
Author(s):  
Alaa Mohammed ◽  
Emad Yousif ◽  
Gamal A. El-Hiti
Keyword(s):  
Carbon Dioxide ◽  
Metal Complexes ◽  
Nickel Chloride ◽  
Proton Nuclear Magnetic Resonance ◽  
Carbon Dioxide Storage ◽  
Average Pore ◽  
Carbon Dioxide Uptake ◽  
Tin Chloride ◽  
Chloride Hexahydrate ◽  
Electron Microscopy Analysis

To address global warming through carbon dioxide storage, three valsartan metal complexes were synthesized in excellent yields (87–92%) through a reaction of the appropriate metal chloride (tin chloride, nickel chloride hexahydrate, or magnesium chloride hexahydrate) and excess valsartan (two mole equivalents) in boiling methanol for 3 h. The structures of the metal complexes were established based on the data obtained from ultraviolet-visible, Fourier transform infrared, and proton nuclear magnetic resonance spectra, as well as from elemental analysis, energy-dispersive X-ray spectra, and magnetic susceptibility. The agglomeration and shape of the particles were determined using field emission scanning electron microscopy analysis. The surface area (16.63–22.75 m2/g) of the metal complexes was measured using the Brunauer-Emmett-Teller method, whereas the Barrett-Joyner-Halenda method was used to determine the particle pore size (0.011–0.108 cm3/g), total average pore volume (6.50–12.46 nm), and pore diameter (6.50–12.47 nm), for the metal complexes. The carbon dioxide uptake of the synthesized complexes, at 323 K and 4 MPa (40 bar), ranged from 24.11 to 34.51 cm2/g, and the nickel complex was found to be the most effective sorbent for carbon dioxide storage.

Structural and surface aspects of thermally treated copper aluminium mixed hydroxides

1991 ◽  
Vol 69 (10) ◽  
pp. 1511-1515 ◽  
Author(s):  
Awad I. Ahmed ◽  
S. E. Samra ◽  
S. A. El-Hakam
Keyword(s):  
Pore Structure ◽  
Copper Content ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Phase Changes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Areas ◽  
Structure Surface ◽  
Adsorption Desorption

CuO–Al2O3 catalysts containing various amounts of copper oxide have been prepared by precipitation. The phase changes were studied by X-ray diffraction. The results obtained revealed that the thermal treatment of solid CuO–Al2O3 at 700 °C produced only crystalline CuO. Heating to 900 °C led to the formation of copper alumina spinel together with unreacted CuO and γ-Al2O3. The spinel content was found to increase with increasing copper content. Nitrogen adsorption–desorption isotherms on the calcined samples have been measured. Surface areas have been calculated and the pore structure analysed. The textural properties of the system were found to depend on both the copper content and the calcination temperature. Key words: CuO, Al2O3 catalysts, structure, surface area, pore structure.

scholarly journals Silver nanoparticles deposited on pyrogenic silica solids: Preparation and textural properties

2017 ◽  
Vol 35 (7-8) ◽  
pp. 714-720 ◽  
Author(s):  
M Zienkiewicz-Strzałka ◽  
M Błachnio ◽  
A Deryło-Marczewska ◽  
RB Kozakevych ◽  
YM Bolbukh ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Silicon Dioxide ◽  
Noble Metal ◽  
Materials Science ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Nanostructured Material ◽  
Scanning Calorimetry ◽  
Adsorption Desorption ◽  
Pyrogenic Silicon Dioxide

Silver-based nanomaterials and composites are important components in materials science and engineering due to the reactivity of silver nanophase based on exceptional surface effects. Ag-doped SiO2 nanocomposites were synthesized by wet impregnation procedure of aminopropyl-functionalized silica materials with submicrometer structure. Aminopropyl-functionalized pyrogenic silicon dioxide with amount of amino groups established as half and close to full monolayer was used to immobilize the nanosilver phase obtained from ammoniacal silver complex as a noble metal precursor. Pyrogenic silicon dioxide as an inexpensive nanostructured material with useful properties including adsorptive affinity for noble metal ions and organic macromolecules was applied as a support for diamminesilver(I) ions and finally for silver nanoparticles. In the present study, the effect of amino-functionalization and silver nanoparticles deposition was monitored by investigation of the textural properties and thermal stability of obtained nanocomposites. The properties of the nanocomposites were investigated by transmission electron microscopy, nitrogen adsorption–desorption isotherms, and thermal analysis (thermogravimetry/differential scanning calorimetry).

Synthesis of SBA-15 under Normal Pressure by Microwave Irradiation Method for Adsorption of Pb(II) in Environment

2010 ◽  
Vol 113-116 ◽  
pp. 775-779 ◽  
Author(s):  
Yan Liu ◽  
Yun Wang ◽  
Xiao Jie Zhang ◽  
Ji Min Xie ◽  
Yong Sheng Yan
Keyword(s):  
Microwave Irradiation ◽  
River Sediments ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Normal Pressure ◽  
X Ray Diffraction ◽  
Microwave Irradiation Method ◽  
Equilibrium Data ◽  
Pseudo Second Order ◽  
Adsorption Desorption

Mesoporous silica SBA-15 has been prepared rapidly under normal pressure by microwave irradiation method. The textural properties were studied by low-angle X-ray diffraction (XRD) and nitrogen adsorption-desorption. The optimum adsorption conditions of Pb(Ⅱ) on SBA-15 was investigated. The results show that the adsorption kinetics follows a pseudo-second-order rate model and the experimental equilibrium data is fitted well by Langmuir adsorption isotherm. The adsorption capacity reaches 50.10 mg•g-1 which is much higher than that of hydrothermal synthesized samples. This adsorbent has been applied in the determination of Pb(Ⅱ) in river sediments samples.

scholarly journals Cyclic voltammetric study of the influence of porosity on electrochemical response of nickel-alumina modified glassy carbon electrode

2018 ◽  
Vol 50 (3) ◽  
pp. 313-321
Author(s):  
Ana Ivanovic-Sasic ◽  
Tatjana Novakovic ◽  
Zorica Mojovic ◽  
Zeljko Cupic ◽  
Dusan Jovanovic
Keyword(s):  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Modified Electrodes ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Cyclic Voltammetric ◽  
Cyclic Voltammetric Study ◽  
Adsorption Desorption

Pure and nickel-modified alumina powders with different porosity were synthesized and applied on the glassy carbon electrode by means of Nafion polymer. The data obtained from the nitrogen adsorption-desorption isotherm confirmed that the pore structures in these materials are complex and tend to be made up of interconnected networks of pores of different size and shape. The addition of Ni2+ ions caused the changes in the textural properties of the samples. The influence of porosity on the electrochemical behavior of modified electrodes in quasi-reversible process was tested by cyclic voltammetry. Numerical correlations between electrochemical responses of GCE modified with alumina samples and textural properties have been established.

Study of the catalytic activity of Al-Fe pillared clays in the Baeyer–Villiger oxidation

Clay Minerals ◽  
2012 ◽  
Vol 47 (2) ◽  
pp. 275-284 ◽  
Author(s):  
L. S. Belaroui ◽  
A. Bengueddach
Keyword(s):  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Pillared Clays ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dissolved Iron ◽  
Surface Areas ◽  
Accessible Surface ◽  
Adsorption Desorption ◽  
Villiger Oxidation

AbstractThree types of AlFePILCs pillared clays have been prepared from Algerian clay precursors. They have been characterized and tested in the Baeyer–Villiger oxidation of cyclohexanone to caprolactone using benzaldehyde and oxygen as oxidant at room temperature. The structural and textural properties of the catalyst have been determined by X-ray diffraction, nitrogen adsorption-desorption isotherms and Mössbauer spectroscopy.The different activities of the clays have been related to their Fe contents and accessible surface areas. The induction period observed before the reaction started has been attributed to the dissolution of a portion of the Fe3+ cations, mediated by either the perbenzoic acid intermediate or the benzoic acid co-product. The reaction was indeed catalysed by a few ppm of dissolved iron cations and the catalysis of the Baeyer–Villiger oxidation reaction should mechanistically be considered as homogeneous.

scholarly journals Roles of London Dispersive and Polar Components of Nano-Metal-Coated Activated Carbons for Improving Carbon Dioxide Uptake

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 691
Author(s):  
Seul-Yi Lee ◽  
Jong-Hoon Lee ◽  
Yeong-Hun Kim ◽  
Kyong-Yop Rhee ◽  
Soo-Jin Park
Keyword(s):  
Co2 Capture ◽  
Co2 Adsorption ◽  
Activated Carbons ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Economic Benefits ◽  
Co2 Uptake ◽  
Carbon Dioxide Uptake ◽  
Polar Components ◽  
Adsorption Behaviors

Adsorption using carbonaceous materials has been considered as the prevailing technology for CO2 capture because it offers advantages such as high adsorption capacity, durability, and economic benefits. Activated carbon (AC) has been widely used as an adsorbent for CO2 capture. We investigated CO2 adsorption behaviors of magnesium oxide-coated AC (MgO-AC) as a function of MgO content. The microstructure and textural properties of MgO-AC were characterized by X-ray diffraction and nitrogen adsorption–desorption isotherms at 77 K, respectively. The CO2 adsorption behaviors of MgO-AC were evaluated at 298 K and 1 atm. Our experimental results revealed that the presence of MgO plays a key role in increasing the CO2 uptake through the interaction between an acidic adsorbate (e+) and an efficient basic adsorbent (e−).

scholarly journals Synthesis and characterization of mesoporous gamma-alumina by glucose as soft-template for molybdenum-99 adsorption: high and low molar ratio of water to aluminium isopropoxide effect

2021 ◽  
Vol 927 (1) ◽  
pp. 012005
Author(s):  
I Saptiama ◽  
A Nurmanjaya ◽  
F Rindiantono ◽  
Marlina ◽  
A M Lestari ◽  
...  
Keyword(s):  
Sol Gel ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Molar Ratio ◽  
Soft Template ◽  
Gamma Alumina ◽  
Aluminium Isopropoxide ◽  
High Molar Ratio ◽  
Gel Treatment ◽  
Adsorption Desorption

Abstract The mesoporous gamma-alumina is a good material for metal adsorption. Its textural properties are excellent, mainly for molybdenum-99 radioisotopes adsorption as part of 99Mo/99mTc generator in nuclear medicine. In this work, we have prepared mesoporous gamma-alumina by sol-gel treatment in the presence of glucose as a soft template. The molar ratio of reactant (water: aluminium isopropoxide(AIP)) was applied in the high and low ratios (150:1 and 25:1). The resulted mesoporous gamma-alumina was investigated using characterization analysis of X-ray diffraction, Nitrogen adsorption-desorption, and FTIR. The results indicate that the mesoporous gamma-alumina in the high molar ratio of water to AIP had a higher surface area and better crystallinity than the low molar ratio of reactants. Furthermore, in the Mo adsorption test, the mesoporous gamma-alumina with the high molar ratio posed a higher Mo adsorption capacity up to 55.69 mg Mo g−1 adsorbent. In the future, the molar ratio of reactants should be tuned in the range of around 150:1 to obtain the optimal Mo adsorption capacities of the resulted mesoporous gamma-alumina using the glucose template.

scholarly journals Utilization of spent dregs for the production of activated carbon for CO2 adsorption

2017 ◽  
Vol 19 (2) ◽  
pp. 44-50 ◽  
Author(s):  
Jarosław Serafin
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Density Functional ◽  
Activated Carbons ◽  
Density Functional Theory Method ◽  
Textural Properties ◽  
Carbon Dioxide Adsorption ◽  
Functional Theory ◽  
Surface Areas ◽  
Adsorption Desorption

Abstract The objective of this work was preparation of activated carbon from spent dregs for carbon dioxide adsorption. A saturated solution of KOH was used as an activating agent. Samples were carbonized in the furnace at the temperature of 550°C. Textural properties of activated carbons were obtained based on the adsorption-desorption isotherms of nitrogen at −196°C and carbon dioxide at 0°C. The specific surface areas of activated carbons were calculated by the Brunauer – Emmett – Teller equation. The volumes of micropores were obtained by density functional theory method. The highest CO2 adsorption was 9.54 mmol/cm3 at 0°C – and 8.50 mmol/cm3 at 25°C.

Microwave-assisted immobilization of metallophthalocyanines in mesoporous channels of MCM-41

2007 ◽  
Vol 11 (02) ◽  
pp. 118-124 ◽  
Author(s):  
Mahtab Pirouzmand ◽  
Mostafa M. Amini ◽  
Nasser Safari
Keyword(s):  
Microwave Irradiation ◽  
Textural Properties ◽  
Nitrogen Adsorption ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Solvent Free Conditions ◽  
Short Period ◽  
Vis Spectroscopy ◽  
Adsorption Desorption ◽  
Mcm 41

Metallophthalocyanines have been assembled in MCM-41 channels by microwave irradiation of a mixture of ion-exchanged MCM-41, and 1,2-dicyanobenzene under solvent-free conditions in a considerably short period of time. The prepared materials have been characterized by diffuse reflectance UV-vis spectroscopy, X-ray powder diffraction XRD, differential scanning calorimetry DSC, and Brunauer-Emmett-Teller BET nitrogen adsorption desorption techniques. The X-ray diffraction and Brunauer-Emmett-Teller results showed that the textural properties of MCM-41 were preserved during microwave irradiation.

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