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Journal articles on the topic 'Xerogeles de carbón'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Abdelwahab, Abdalla, Francisco Carrasco-Marín, and Agustín F. Pérez-Cadenas. "Carbon Xerogels Hydrothermally Doped with Bimetal Oxides for Oxygen Reduction Reaction." Materials 12, no. 15 (2019): 2446. http://dx.doi.org/10.3390/ma12152446.

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A total of two carbon xerogels doped with cobalt and nickel were prepared by the sol–gel method. The obtained carbon xerogels underwent further surface modification with three binary metal oxides namely: nickel cobaltite, nickel ferrite, and cobalt ferrite through the hydrothermal method. The mesopore volumes of these materials ranged between 0.24 and 0.40 cm3/g. Moreover, there was a morphology transformation for the carbon xerogels doped with nickel cobaltite, which is in the form of nano-needles after the hydrothermal process. Whereas the carbon xerogels doped with nickel ferrite and cobalt

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2

Strachowski, Przemysław, Wojciech Kiciński, Maciej Fronczak, Waldemar Kaszuwara, Piotr Baranowski, and Michał Bystrzejewski. "An activation-free route to porous magnetic carbon adsorbents for the removal of phenolic compounds." New Journal of Chemistry 43, no. 27 (2019): 10792–802. http://dx.doi.org/10.1039/c9nj01981b.

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Magnetic composite carbon xerogels were synthesized via acidic gelation of resorcinol and furfural in the presence of carbon-encapsulated iron nanoparticles with subsequent carbonization of the as-obtained magnetic organic xerogel.

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3

Quach, Nguyen Khanh Nguyen, Wein-Duo Yang, Zen-Ja Chung, and Hoai Lam Tran. "The Influence of the Activation Temperature on the Structural Properties of the Activated Carbon Xerogels and Their Electrochemical Performance." Advances in Materials Science and Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/8308612.

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The effect of activation temperature on the structural properties and the electrochemical performance of KOH-activated carbon xerogel was investigated in range of 700 to 1000°C. At a high temperature (1000°C), the chemical activation regenerated a more crystalline network structure of activated carbon xerogels, which was observed by Raman, XRD, and TEM images. Additionally, SEM images, BET, BJH, and t-plot were used to study the structural properties of carbon xerogels. The carbon xerogel sample activated at 900°C was found with the most appropriate structure, which has the high micropore area

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4

Kraiwattanawong, Kriangsak. "Porous Properties of Carbon/Carbon Composite Xerogels." Materials Science Forum 928 (August 2018): 62–67. http://dx.doi.org/10.4028/www.scientific.net/msf.928.62.

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Carbon/carbon composite xerogels are prepared by a vacuum drying technique whereas a carbon cryogel is synthesized by a freeze drying technique to compare the effect of these drying methods at the selective synthesis condition. Resorcinol and formaldehyde are used to prepare a matrix phase and cotton fibers are acted as a disperse phase of the carbon/carbon composite xerogels. Here resorcinol and formaldehyde is utilized to synthesize the carbon cryogel only. The carbon/carbon composite xerogels and the carbon cryogel were analyzed by a nitrogen adsorption apparatus and a field emission scanni

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5

Canal-Rodríguez, Maria, Ana Arenillas, Sara F. Villanueva, Miguel A. Montes-Morán, and J. Angel Menénedez. "Graphitized Carbon Xerogels for Lithium-Ion Batteries." Materials 13, no. 1 (2019): 119. http://dx.doi.org/10.3390/ma13010119.

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Carbon xerogels with different macropore sizes and degrees of graphitization were evaluated as electrodes in lithium-ion batteries. It was found that pore structure of the xerogels has a marked effect on the degree of graphitization of the final carbons. Moreover, the incorporation of graphene oxide to the polymeric structure of the carbon xerogels also leads to a change in their carbonaceous structure and to a remarkable increase in the graphitic phase of the samples studied. The sample with the highest degree of graphitization (i.e., hybrid graphene-carbon xerogel) displayed the highest capa

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6

Abdelwahab, Abdalla, Francisco Carrasco-Marín, and Agustín F. Pérez-Cadenas. "Binary and Ternary 3D Nanobundles Metal Oxides Functionalized Carbon Xerogels as Electrocatalysts toward Oxygen Reduction Reaction." Materials 13, no. 16 (2020): 3531. http://dx.doi.org/10.3390/ma13163531.

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A series of carbon xerogels doped with cobalt, nickel, and iron have been prepared through the sol–gel method. The doped carbon xerogels were further functionalized with binary and ternary transition metal oxides containing Co, Ni, and Zn oxides by the hydrothermal method. A development in the mesopore volume is achieved for functionalized carbon xerogel doped with iron. However, in the functionalization of carbon xerogel with ternary metal oxides, a reduction in pore diameter and mesopore volume is found. In addition, all functionalized metal oxides/carbon are in the form of 3D nanobundles wi

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7

Quach, Nguyen Khanh Nguyen, Wein-Duo Yang, Zen-Ja Chung, Hoai Lam Tran, and Rui Liu. "Investigation of the Characteristic Properties of Glacial Acetic Acid-Catalyzed Carbon Xerogels and Their Electrochemical Performance for Use as Electrode Materials in Electrical Double-Layer Capacitors." Advances in Materials Science and Engineering 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/5851841.

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Glacial acetic acid was used as a catalyst in the preparation process of carbon xerogels from the condensation of resorcinol and formaldehyde for shortening significantly the gelation time. The effect of the resorcinol/catalyst ratio over a large range of 2 to 500, the solvent exchange manner with acetone, and the pyrolysis temperature of 700 to 1000°C on the characteristic properties of the carbon xerogels were investigated. A resorcinol/catalyst ratio of 2 and a pyrolysis temperature at 800°C were found to be the optimal condition for the preparation of carbon xerogels with a well-balanced p

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8

Ayu Lestari, Riani, Muthia Elma, Erdina Lulu Atika Rampun, et al. "Functionalization of Si-C Using TEOS (Tetra Ethyl Ortho Silica) as Precursor and Organic Catalyst." E3S Web of Conferences 148 (2020): 07008. http://dx.doi.org/10.1051/e3sconf/202014807008.

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Silica network was tailored configuring siloxane (Si-O-Si) and silanol (Si-OH) groups which are essential to produce porous-structured materials. As silanols are hydrophilic, react with water to form fouling. This research address to actualize strategy for synthesizing highly functionalized silica carbon (Si-C) using hybrid organic-inorganic structures as the primary method for improving hydro-stability by employing precursor TEOS and organic catalyst through a sol-gel process. Catalysis employs citric acid or citric acid-ammonia whereas carbon templated into silica network. The synthesis sche

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9

Alegre, C., M. E. Gálvez, D. Sebastián, R. Moliner, and M. J. Lázaro. "Influence of Synthesis pH on Textural Properties of Carbon Xerogels as Supports for Pt/CXs Catalysts for Direct Methanol Fuel Cells." International Journal of Electrochemistry 2012 (2012): 1–9. http://dx.doi.org/10.1155/2012/267893.

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Carbon xerogels (CXs) have been prepared by polycondensation of resorcinol and formaldehyde. Two synthesis pHs were studied in order to evaluate its influence on the electrochemical behaviour of Pt catalysts supported on previous carbon xerogels, synthesized by conventional impregnation method. Catalysts were also synthesized over a commercial carbon black (Vulcan-XC-72R) for comparison purposes. Characterization techniques included nitrogen physisorption, scanning electron microscopy, and X-ray diffraction. Catalysts electrochemical activity towards the oxidation of carbon monoxide and methan

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10

A. Wasfey, Madlin, Abdalla Abdelwahab, Francisco Carrasco-Marín, et al. "Nickel Cobaltite Functionalized Silver Doped Carbon Xerogels as Efficient Electrode Materials for High Performance Symmetric Supercapacitor." Materials 13, no. 21 (2020): 4906. http://dx.doi.org/10.3390/ma13214906.

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Introducing new inexpensive materials for supercapacitors application with high energy density and stability, is the current research challenge. In this work, Silver doped carbon xerogels have been synthesized via a simple sol-gel method. The silver doped carbon xerogels are further surface functionalized with different loadings of nickel cobaltite (1 wt.%, 5 wt.%, and 10 wt.%) using a facile impregnation process. The morphology and textural properties of the obtained composites are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (

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11

Labban, Najwa, Mulugeta Wayu, Ciara Steele, et al. "First Generation Amperometric Biosensing of Galactose with Xerogel-Carbon Nanotube Layer-By-Layer Assemblies." Nanomaterials 9, no. 1 (2018): 42. http://dx.doi.org/10.3390/nano9010042.

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A first-generation amperometric galactose biosensor has been systematically developed utilizing layer-by-layer (LbL) construction of xerogels, polymers, and carbon nanotubes toward a greater fundamental understanding of sensor design with these materials and the potential development of a more efficient galactosemia diagnostic tool for clinical application. The effect of several parameters (xerogel silane precursor, buffer pH, enzyme concentration, drying time and the inclusion of a polyurethane (PU) outer layer) on galactose sensitivity were investigated with the critical nature of xerogel se

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12

Abdelrazek, Ghada M., Mohamed M. EL-Deeb, Ahmed A. Farghali, Agustín F. Pérez-Cadenas, and Abdalla Abdelwahab. "Design of Self-Supported Flexible Nanostars MFe-LDH@ Carbon Xerogel-Modified Electrode for Methanol Oxidation." Materials 14, no. 18 (2021): 5271. http://dx.doi.org/10.3390/ma14185271.

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Layered double hydroxides (LDHs) have emerged as promising electrodes materials for the methanol oxidation reaction. Here, we report on the preparation of different LDHs with the hydrothermal process. The effect of the divalent cation (i.e., Ni, Co, and Zn) on the electrochemical performance of methanol oxidation was investigated. Moreover, nanocomposites of LDHs and carbon xerogels (CX) supported on nickel foam (NF) substrate were prepared to investigate the role of carbon xerogel. The results show that NiFe-LDH/CX/NF is an efficient electrocatalyst for methanol oxidation with a current densi

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13

LIU, LIHONG. "SINGLE-STEP SYNTHESIS OF COBALT-OXIDE SHELLED NANOCARBONS." International Journal of Nanoscience 04, no. 04 (2005): 591–98. http://dx.doi.org/10.1142/s0219581x05003255.

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In this paper, we report a simple solid-state method for fabricating cobalt-oxide–carbon core-shell nanostructures. With this technique, various forms of nanocarbons such as nanotubes, polyhedrons and onions can be generated via pyrolyzing cobalt–complex xerogels at 150 ~ 340°C. The thus-formed nanocarbons can be protected by cobalt-oxide matrix up to 1000°C in air atmosphere. Cobalt-oxide shelled or unshelled nanocarbons can be controlled by choosing a suitable complexing agent for the xerogel precursors. In particular, glycine has been proven to be a good complexing agent for low-temperature

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14

Orge, C. A., J. J. M. Órfão, and M. F. R. Pereira. "Carbon xerogels and ceria–carbon xerogel materials as catalysts in the ozonation of organic pollutants." Applied Catalysis B: Environmental 126 (September 2012): 22–28. http://dx.doi.org/10.1016/j.apcatb.2012.06.029.

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15

Zhang, Rui, Zi Jun Hu, Shuang Ling Jin, Xia Shao, and Ming Lin Jin. "Synthesis of Monolithic Macroporous Carbon Xerogels from Phenol, m-Cresol, Furfural and Phosphoric Acid by Sol-Gel Approach." Advanced Materials Research 750-752 (August 2013): 1804–11. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.1804.

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Mixtures of phenol and m-cresol in 1-propanol were first reacted with phosphoric acid and then with furfural to form gels, which were dried under ambient pressure and pyrolyzed under nitrogen atmosphere to form monolithic macroporous carbon xerogels. The molar ratio of m-cresol to phenol (m-C/P), phenol and m-cresol to furfural ((m-C+P)/F), phenol and m-cresol to phosphoric acid ((m-C+P)/H3PO4) was fixed at 1:5, 1:2 and 4.0 respectively while the m-C+P+F in 1-propanol was changed from 18 to 30 g/100ml to investigate the effect of the m-C+P+F concentrations on the porous properties of the monol

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16

Morales-Torres, Sergio, Hana Jirglová, Luisa M. Pastrana-Martínez, and Francisco J. Maldonado-Hódar. "Influence of Electrostatic Interactions During the Resorcinol-Formaldehyde Polymerization on the Characteristics of Mo-Doped Carbon Gels." Processes 8, no. 6 (2020): 746. http://dx.doi.org/10.3390/pr8060746.

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The resorcinol (R)-formaldehyde (F) polymerization was carried out in different experimental conditions to obtain RF/Mo doped carbon xerogels with different morphology, porosity and nature and dispersion of metal. Attractive or repulsive electrostatic interactions were forced in the starting aqueous solution of RF-monomers using different synthesis conditions, namely, combinations of cationic or anionic surfactants, Mo-precursors and pH values. The results showed that when both cationic surfactant and Mo-precursor were used at neutral pH, attractive interactions with the anionic RF-macromolecu

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17

Kraiwattanawong, Kriangsak, Noriaki Sano, and Hajime Tamon. "Influence of Evaporation Drying on the Porous Properties of Carbon/Carbon Composite Xerogels." Polymers 13, no. 16 (2021): 2631. http://dx.doi.org/10.3390/polym13162631.

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Carbon/carbon (C/C) composite xerogels dried by evaporation were prepared in this study to observe the change of their porous properties and their morphology by nitrogen sorption apparatus and a scanning electron microscope. Resorcinol and formaldehyde (RF) sols as a matrix phase and cotton fibers (CF) as a dispersed phase were mixed and gelated to be CF/RF composite hydrogels. The composite hydrogels were exchanged by t-butanol (TBA), dried by evaporation at 50 °C, and carbonized at 1000 °C to become the C/C composite xerogels. The results show that the CF addition does not decrease the mesop

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18

Pillai, Athulya, and Balasubramanian Kandasubramanian. "Carbon Xerogels for Effluent Treatment." Journal of Chemical & Engineering Data 65, no. 5 (2020): 2255–70. http://dx.doi.org/10.1021/acs.jced.0c00092.

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19

Yang, Li Li, Jiu Peng Zhao, and Yao Li. "Microstructure and Mechanical Properties of Silica Xerogels Doped with SiC Whisker and Short Carbon Fiber." Key Engineering Materials 336-338 (April 2007): 2104–6. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.2104.

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Silica xerogels were prepared by sol-gel process and non-supercritical drying. Two kinds of reinforcements, SiC whisker and short carbon fiber (CF), were chosen to control the shrinkage during drying process and improve the mechanical properties of xerogels. Microstructure and mechanical properties of samples were examined. It was found that the addition of SiC whisker could greatly improve the elastic modulus of silica xerogels, while short CF could prominently decrease the volume shrinkage ratio but could not improve the elastic modulus. Analysis showed that the difference between the two re

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20

Mahato, Nihar Ranjan, Kamala Mandy Hansda, Ajit Das, Jayanta Banerjee, Sridhar Mondal, and Nagendranath Mahata. "Synthesis of Mesoporous Carbon Xerogel and Activation by Oxidative Treatment." Asian Journal of Chemistry 31, no. 10 (2019): 2139–42. http://dx.doi.org/10.14233/ajchem.2019.22009.

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Synthesis of carbon xerogel and modification of its surface by various oxidative treatments are explored. Organic gel was synthesized by following the conventional sol-gel approach using formaldehyde and resorcinol. The wet gel was dried under subcritical condition and then carbonized, leading to carbon xerogel. Subsequently, the carbon xerogel was subjected to surface activation by means of oxidative treatment with nitric acid, sulphuric acid as well as aerial oxidation. Surface acid/base properties of the carbon xerogel have been strongly altered by treatments with nitric acid as well as wit

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21

Calvo, E. G., N. Rey-Raap, A. Arenillas, and J. A. Menéndez. "The effect of the carbon surface chemistry and electrolyte pH on the energy storage of supercapacitors." RSC Adv. 4, no. 61 (2014): 32398–404. http://dx.doi.org/10.1039/c4ra04430d.

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22

Elmouwahidi, A., E. Bailón-García, J. Castelo-Quibén, A. F. Pérez-Cadenas, F. J. Maldonado-Hódar, and F. Carrasco-Marín. "Carbon–TiO2 composites as high-performance supercapacitor electrodes: synergistic effect between carbon and metal oxide phases." Journal of Materials Chemistry A 6, no. 2 (2018): 633–44. http://dx.doi.org/10.1039/c7ta08023a.

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23

Zubizarreta, Leire, Ana Arenillas, José Juan Pis, Jean-Paul Pirard, and Nathalie Job. "Studying chemical activation in carbon xerogels." Journal of Materials Science 44, no. 24 (2009): 6583–90. http://dx.doi.org/10.1007/s10853-009-3918-5.

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24

Zhou, Jin, Zhongshen Zhang, Zhaohui Li, Tingting Zhu, and Shuping Zhuo. "One-step and template-free preparation of hierarchical porous carbons with high capacitive performance." RSC Advances 5, no. 58 (2015): 46947–54. http://dx.doi.org/10.1039/c5ra07807e.

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25

Vareda, João P., Artur J. M. Valente, and Luisa Durães. "Silica Aerogels/Xerogels Modified with Nitrogen-Containing Groups for Heavy Metal Adsorption." Molecules 25, no. 12 (2020): 2788. http://dx.doi.org/10.3390/molecules25122788.

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Heavy metals are common inorganic pollutants found in the environment that have to be removed from wastewaters and drinking waters. In this work, silica-derived aerogels and xerogels were modified via a co-precursor method to obtain functional adsorbents for metal cations. A total of six formulations based upon four different functional precursors were prepared. The materials′ structural characterization revealed a decreased porosity and surface area on modified samples, more prominent in xerogel counterparts. Preliminary tests were conducted, and the prepared samples were also compared to act

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26

Oyedoh, Eghe A., and Michael C. Ekwonu. "EXPERIMENTAL INVESTIGATION ON CHROMIUM(VI) REMOVAL FROM AQUEOUS SOLUTION USING ACTIVATED CARBON RESORCINOL FORMALDEHYDE XEROGELS." Acta Polytechnica 56, no. 5 (2016): 373–78. http://dx.doi.org/10.14311/ap.2016.56.0373.

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The adsorption of chromium(VI) metal ion in aqueous solutions by activated carbon resorcinol formaldehyde xerogels (ACRF) was investigated. The results showed that pore structure, surface area and the adsorbent surface chemistry are important factors in the control of the adsorption of chromium(VI) metal ions. The isotherm parameters were obtained from plots of the isotherms and from the application of Langmuir and Freundlich Isotherms. Based on regression analysis, the Langmuir isotherm model was the best fit. The maximum adsorption capacity of ACRF for chromium (VI) was 241.9 mg/g. The pseud

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27

Mohaddespour, Ahmad, Saeid Atashrouz, and Seyed Javad Ahmadi. "Nanostructured Carbon Xerogels by Super-Fast Carbonization." Industrial & Engineering Chemistry Research 56, no. 21 (2017): 6213–20. http://dx.doi.org/10.1021/acs.iecr.7b00028.

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28

Scherdel, C., and G. Reichenauer. "Carbon xerogels synthesized via phenol–formaldehyde gels." Microporous and Mesoporous Materials 126, no. 1-2 (2009): 133–42. http://dx.doi.org/10.1016/j.micromeso.2009.05.033.

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29

Zubizarreta, L., J. A. Menéndez, N. Job, et al. "Ni-doped carbon xerogels for H2 storage." Carbon 48, no. 10 (2010): 2722–33. http://dx.doi.org/10.1016/j.carbon.2010.03.068.

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30

Kang, Kyung Yeon, Burtrand I. Lee, and Jae Sung Lee. "Hydrogen adsorption on nitrogen-doped carbon xerogels." Carbon 47, no. 4 (2009): 1171–80. http://dx.doi.org/10.1016/j.carbon.2009.01.001.

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31

Sousa, Juliana P. S., Manuel F. R. Pereira, and José L. Figueiredo. "NO oxidation over nitrogen doped carbon xerogels." Applied Catalysis B: Environmental 125 (August 2012): 398–408. http://dx.doi.org/10.1016/j.apcatb.2012.06.009.

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32

Skoda, David, Ales Styskalik, Zdenek Moravec, et al. "Mesoporous SnO2–SiO2 and Sn–silica–carbon nanocomposites by novel non-hydrolytic templated sol–gel synthesis." RSC Advances 6, no. 73 (2016): 68739–47. http://dx.doi.org/10.1039/c6ra16556g.

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33

Liu, Zhi, Aiqin Wang, Xiaodong Wang, and Tao Zhang. "Reduction of NO by Cu–carbon and Co–carbon xerogels." Carbon 44, no. 11 (2006): 2345–47. http://dx.doi.org/10.1016/j.carbon.2006.04.012.

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34

Grishechko, L. I., G. Amaral-Labat, V. Fierro, A. Szczurek, B. N. Kuznetsov, and A. Celzard. "Biosourced, highly porous, carbon xerogel microspheres." RSC Advances 6, no. 70 (2016): 65698–708. http://dx.doi.org/10.1039/c6ra09462g.

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35

Afify, Hany, Abdalla Abdelwahab Abdalla Abdelwahab, Hesham Abdel-Samad, and Hamdy Hassan. "Cobalt doped carbon xerogels as efficient supercapacitor electrodes." International Journal of Development 8, no. 1 (2019): 105–11. http://dx.doi.org/10.21608/idj.2019.64041.

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36

Molchanov, V. V., M. N. Shchuchkin, V. I. Zaikovskii, S. V. Bogdanov, and N. A. Zaitseva. "Sorbents and supports based on nanoporous carbon xerogels." Kinetics and Catalysis 49, no. 5 (2008): 702–7. http://dx.doi.org/10.1134/s0023158408050157.

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37

Gorgulho, Honória F., Filomena Gonçalves, Manuel Fernando R. Pereira, and José L. Figueiredo. "Synthesis and characterization of nitrogen-doped carbon xerogels." Carbon 47, no. 8 (2009): 2032–39. http://dx.doi.org/10.1016/j.carbon.2009.03.050.

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38

Sumardi, Anna, Muthia Elma, Aptar Eka Lestari, et al. "Deconvolution of TEOS/TEVS Xerogel by Single or Dual Organic Catalyst Addition." Jurnal Kimia Valensi 6, no. 2 (2021): 208–14. http://dx.doi.org/10.15408/jkv.v6i2.17597.

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Currently, xerogel has been applied as a filtration material, especially in membrane desalination. However, the xerogel matrix structure for desalination have to be designed properly in order to allow rejection of salt and obtain good hydro-stability, thus, silica precursor in the form of TEOS (tetraethyl orthosilicate)/TEVS (triethoxy vinyl silane) and organic acid catalyst are suitable material for fabrication. The aim of this study is therefore to fabricate and perform deconvolution of TEOS/TEVS xerogel by adding single or dual catalyst, using FTIR (Fourier-transform Infrared Spectroscopy)

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39

Ichard, J. C., R. Pailler, and Jacques Lamon. "Ceramic Matrix Composite with Increased Thermal Conductivity." Advances in Science and Technology 45 (October 2006): 1405–10. http://dx.doi.org/10.4028/www.scientific.net/ast.45.1405.

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The purpose of the study was to increase the thermal conductivity of multilayered and self-sealing ceramic matrix composites via the silicon melt infiltration process. The first step of the process consisted in filling porosity using various organic xerogels by the sol-gel route. Carbon xerogels obtained by subsequent pyrolysis may reduce and homogenize the porous network within the composite. Cracking of the xerogels due to volumic shrinkage occurring during air drying may be decreased by controlling the initial parameters as concerns the gel solution and/or by operating a second impregnation

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40

Gheorghiu, C. C., C. Salinas-Martínez de Lecea, and M. C. Román-Martínez. "Non-covalent immobilization of RhDuphos on carbon nanotubes and carbon xerogels." Applied Catalysis A: General 478 (May 2014): 194–203. http://dx.doi.org/10.1016/j.apcata.2014.04.001.

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41

Šljukić, B., M. Vujković, L. Amaral, et al. "Carbon-supported Mo2C electrocatalysts for hydrogen evolution reaction." Journal of Materials Chemistry A 3, no. 30 (2015): 15505–12. http://dx.doi.org/10.1039/c5ta02346g.

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Molybdenum carbide (Mo<sub>2</sub>C) nanoparticles supported on carbon nanotubes and on carbon xerogel were evaluated as electrocatalysts for HER in acid media, showing good performance and stability.

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42

Hristea, Gabriela, Mihai Iordoc, and Andreea Culcea. "Nanocarbon Type Xerogel Materials Designed for Water Desalination." Materials 14, no. 17 (2021): 4932. http://dx.doi.org/10.3390/ma14174932.

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The relative performance of different porous solids in different applications is highly dependent on the internal pore structure of each material. Highly porous carbon materials can be prepared by evaporative drying and the pyrolysis of resorcinol-formaldehyde gels. By determining the correct synthesis parameters, the pore system of such materials can be reshaped. Depending on some important processing factors such as the dilution ratio or the initial pH of the precursor solution, various porous or non-porous carbon materials can be synthesized. This paper addresses carbon xerogels (CX) design

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Santos, Gabriela Spirandelli dos, Clarice Moreira Goes, Juliana Giancoli Martins de Sousa, Nicolas Perciani de Moraes, Livia Chaguri, and Liana Alvares Rodrigues. "Evaluation of ZnO/Carbon Xerogel Composite as a Photocatalyst for Solar and Visible Light Degradation of the Rhodamine B Dye." Journal of Nanoscience and Nanotechnology 21, no. 4 (2021): 2292–301. http://dx.doi.org/10.1166/jnn.2021.18962.

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This study is focused on the evaluation of the Rhodamine B photodegradation using ZnO/carbon xerogel composite as a photocatalyst, in order to enhance the photocatalytic process efficiency under visible light. The proposed synthesis employs tannin as a precursor for the carbon xerogel, which enhances the economic and environmental aspect of the composite. The synthesized materials have the hexagonal structure of the zinc oxide (wurtzite), which is homogeneously distributed on the carbonaceous matrix. The diffuse reflectance test shows that light absorption was significantly enhanced for the co

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MISRAN, HALINA, RAMESH SINGH, and MARIYAM JAMEELAH GHAZALI. "PALM OIL BASED FATTY ALCOHOLS TEMPLATED MESOPOROUS SILICA AND SILICA SPHERES." International Journal of Nanoscience 10, no. 06 (2011): 1275–81. http://dx.doi.org/10.1142/s0219581x1100960x.

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Mesoporous silica xerogels with wormhole-like pore structure were successfully synthesized using a series of surfactantless oil-in-water emulsion at room temperature. The surfactantless emulsion systems consisted of palm-oil derived fatty alcohols having several carbon chain lengths to act as mesoporous templates in place of commercial surfactants in a direct base–acid catalyzed sol–gel method. This method allowed direct decomposition of fatty alcohols in situ during calcination process to create mesoporosity in the materials. The mesoporous silica xerogels exhibited relatively high surface ar

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Rastegar, Ayoob, Mitra Gholami, Ahmad Jonidi Jafari, Ahmad Hosseini-Bandegharaei, Majid Kermani, and Yeganeh Kosar Hashemi. "Use of NH4Cl for activation of carbon xerogel to prepare a novel efficacious adsorbent for benzene removal from contaminated air streams in a fixed-bed column." Journal of Environmental Health Science and Engineering 18, no. 2 (2020): 1141–49. http://dx.doi.org/10.1007/s40201-020-00533-5.

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Abstract Background Ammonium chloride as an explosive salt has proved to be a prominent activation agent for adsorbents and increase the specific surface area and volume of cavities. In this work, the ability of this substance was scrutinized for activation of carbon aerogel to prepare an efficient adsorbent for benzene removal from air streams. Methods A carbon xerogel was fabricated from Novallac polymer and activated by ammonium chloride.The changes in structure and morphology were considered via Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared (F

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Bailón-García, Esther, Francisco J. Maldonado-Hódar, Francisco Carrasco-Marín, Agustín F. Pérez-Cadenas, Susanna Bosi, and Maurizio Prato. "The use of functionalized carbon xerogels in cells growth." Materials Science and Engineering: C 100 (July 2019): 598–607. http://dx.doi.org/10.1016/j.msec.2019.03.033.

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Lin, Chuan, and James A. Ritter. "Carbonization and activation of sol–gel derived carbon xerogels." Carbon 38, no. 6 (2000): 849–61. http://dx.doi.org/10.1016/s0008-6223(99)00189-x.

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Zubizarreta, L., A. Arenillas, A. Domínguez, J. A. Menéndez, and J. J. Pis. "Development of microporous carbon xerogels by controlling synthesis conditions." Journal of Non-Crystalline Solids 354, no. 10-11 (2008): 817–25. http://dx.doi.org/10.1016/j.jnoncrysol.2007.08.015.

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Morales-Torres, Sergio, Francisco J. Maldonado-Hódar, Agustín F. Pérez-Cadenas, and Francisco Carrasco-Marín. "Structural characterization of carbon xerogels: From film to monolith." Microporous and Mesoporous Materials 153 (May 2012): 24–29. http://dx.doi.org/10.1016/j.micromeso.2011.12.022.

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Espinosa-Iglesias, David, Carmen Valverde-Sarmiento, Agustín F. Pérez-Cadenas, Ma Isidora Bautista-Toledo, Francisco J. Maldonado-Hódar, and Francisco Carrasco-Marín. "Mesoporous carbon-xerogels films obtained by microwave assisted carbonization." Materials Letters 141 (February 2015): 135–37. http://dx.doi.org/10.1016/j.matlet.2014.11.052.

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