Facile synthesis of resorcinol–formaldehyde/silica composite aerogels and their transformation to monolithic carbon/silica and carbon/silicon carbide composite aerogels

Kong, Yong; Zhong, Ya; Shen, Xiaodong; Cui, Sheng; Yang, Meng; Teng, Kaiming; Zhang, Junjun

doi:10.1016/j.jnoncrysol.2012.08.029

Cited by 65 publications

(26 citation statements)

References 27 publications

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“…3. AH-RFSA shows type IV-III isotherms with type H1 hysteresis loops in the IUPAC classification, suggesting that they have the characterizations of mesopores and interparticular voids [59,63,64]. The adsorption of P/ P 0 < 0.05 attributed to the contribution of micropores (<2 nm) is low, indicating that there is hardly micropores in the samples, which is proved by the pore-size distribution curves.…”

Section: Characterizationsmentioning

confidence: 86%

“…When R and F are introduced into the reaction system, such a cyclic intermediate could provide an energetically favorable reaction path, thereby accelerating the polycondensation of the sol-gel reaction [58]. Obviously, APTES plays roles of both ''internal catalyst'' to drive the sol-gel reaction and reactant to form gel framework/network [59]. For this reaction system to form AH-RFSA, the polycondensation of R and F could take place with the ''catalysis'' of APTES (alkaline) which plays a similar role as the basic catalyst (sodium carbonate) used in the typical synthesis of RF gel [60,61], as presented in Scheme 1.…”

Section: Reaction Mechanismmentioning

confidence: 99%

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Development of monolithic adsorbent via polymeric sol–gel process for low-concentration CO2 capture

et al. 2015

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Section: Characterizationsmentioning

confidence: 86%

Section: Reaction Mechanismmentioning

confidence: 99%

Development of monolithic adsorbent via polymeric sol–gel process for low-concentration CO2 capture

et al. 2015

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“…In recent years, the synthesis of nanoporous solids has received much attention, and important methods to fabricate their pore structures have been proposed recently [1][2][3][4][5], such as carbon aerogels. The pore continuity of aerogels, sol-gel process has attracted much attention for the fabrication of porous materials [5].…”

Section: Inorganic Ions Adsorption On Carbon Aerogelmentioning

confidence: 99%

Microporous and Mesoporous Materials in Decontamination of Water Process

Fonseca-Correa¹,

Murillo-Acevedo²,

Moreno–Piraján³

2016

Microporous and Mesoporous Materials

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Water pollution is the main threat that confronts humanity today. The daily human activity introduces different pollutants in hydric sources that modify water quality. This represents a high production of water that is not appropriate for different applications like human consumption. Among the water pollutants more common are dyes, herbicides, pesticides, alkanes, halo alkanes, aliphatic compounds, alcohols, carboxylic acids, aromatic compounds, detergents, surfactants, inorganic compounds (heavy metals), harmful gases, and pathogenic bacteria (bacteria and virus). These pollutants can be found in underground and surface water, and therefore can produce adverse effects on the environment and human health. These effluents can be treated with different procedures such as biological and chemical treatments, among others. However, in some cases, these processes are not appropriate for compliance legislation. Thus, adsorption with special materials such as carbon aerogels and advance oxidation processes such as photocatalysis are widely studied nowadays.

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“…The hard templates include mesoporous silica materials, [28][29][30] zeolites, [31][32][33] metal-organic frameworks 34,35 and so on. For example, Kong et al synthesized a carbon/silica matrix which apply resorcinol-formaldehyde to serve as the precursor templated with 3-aminopropyl-triethoxysilane, 36 then the HF or NaOH was used to remove the silica as hard template, which obtained the mesoporous carbon material. Dai and coworkers reported the ordered mesoporous carbon was synthesized by using so template, which employs resorcinol-formaldehyde as carbon source and diblock copolymer polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) as a so template.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a hierarchical nanoporous carbon material with controllable pore size and effective surface area for high-performance electrochemical capacitors

Kong

Kang

et al. 2017

RSC Adv.

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A simple carbonization procedure is proposed for the synthesis of hierarchical nanoporous carbons with controllable pore size and effective surface area as electrode materials for high-performance electrochemical double-layer capacitors. The procedure is based on the carbonization of interpenetrating polymer networks (IPNs) composed of cross-linked polystyrene (PS) and poly(methyl methacrylate) (PMMA). The as-obtained hierarchical nanoporous carbons (HNC-IPNs) have controllable pore size, interconnected pore structure, high specific surface area, excellent electrical conductivity and electrochemical stability with the different mass ratio of PS/PMMA. In addition, there is authentically an excellent linear relationship between effective specific surface area (E-SSA) and specific capacitance.Especially, the HNC-IPN-4 exhibits the highest specific surface area (SSA) of 1346 m 2 g À1, relative high E-SSA of 603 m 2 g À1 , and excellent specific capacitance of 260 F g À1 under the current density of 0.5 A g À1 in 6 M KOH. Meanwhile, the HNC-IPN-4 exhibits a superior cycling performance without any degradation after 10 000 cycles with the current density of 2 A g À1 as well as exhibits high capacitance retention, i.e., 96.0% of the initial specific capacitance after 20 000 cycles.

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Facile synthesis of resorcinol–formaldehyde/silica composite aerogels and their transformation to monolithic carbon/silica and carbon/silicon carbide composite aerogels

Cited by 65 publications

References 27 publications

Development of monolithic adsorbent via polymeric sol–gel process for low-concentration CO2 capture

Development of monolithic adsorbent via polymeric sol–gel process for low-concentration CO2 capture

Microporous and Mesoporous Materials in Decontamination of Water Process

Synthesis of a hierarchical nanoporous carbon material with controllable pore size and effective surface area for high-performance electrochemical capacitors

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