Water-Processable Laponite/Polyaniline/Graphene Oxide Nanocomposites for Energy Applications

Ramphal, Isaac A.; Hagerman, Michael E.

doi:10.1021/la5046783

Cited by 38 publications

(13 citation statements)

References 60 publications

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“…The same peaks were observed in the PANI/laponite composites [40]. The peak at 1304 cm − [43]. This confirms that laponite is interacting with PANI perfectly.…”

Section: Figsupporting

confidence: 78%

Fabrication of electric-stimuli responsive polyaniline/laponite composite and its viscoelastic and dielectric characteristics

Jun

Sim

Choi

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…The same peaks were observed in the PANI/laponite composites [40]. The peak at 1304 cm − [43]. This confirms that laponite is interacting with PANI perfectly.…”

Section: Figsupporting

confidence: 78%

Fabrication of electric-stimuli responsive polyaniline/laponite composite and its viscoelastic and dielectric characteristics

Jun

Sim

Choi

2015

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…A number of review papers as well as several books entirely devoted to the subject have appeared. [265][266][267][268][269][270][271][272] The first reason for adding nanoclay fillers to polymers was to reduce costs. But it later turned out that a small amount of clay added as a filler could bring additional benefits, as witnessed by the synthesis of nylon 6-clay hybrid that has been commercialized by Toyota in Japan.…”

Section: Applications Of Nanoclaysmentioning

confidence: 99%

Nanosized microporous crystals: emerging applications

2015

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This review highlights recent developments in the synthesis and unconventional applications of nanosized microporous crystals including framework (zeolites) and layered (clays) type materials. Owing to their microporous nature nanosized zeolites and clays exhibit novel properties, different from those of bulk materials. The factors controlling the formation of nanosized microporous crystals are first revised. The most promising approaches from the viewpoint of large-scale production of nanosized zeolites and clays are discussed in depth. The preparation and advanced applications of nanosized zeolites and clays in free (suspension and powder forms) and fixed (films) forms are summarized. Further the review emphasises the non-conventional applications of new porous materials. A comprehensive analysis of the emerging applications of microporous nanosized crystals in the field of semiconductor industry, optical materials, chemical sensors, medicine, cosmetics, and food industry is presented. Finally, the future needs and perspectives of nanosized microporous materials (zeolites and clays) are addressed.

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“…Practically, the surface area of graphene-based materials is much lower than the theoretical value which is due to the self-stacking nature through π-π interaction. 3D structure engineering 35 , 36 through composite making with polymer derived carbon 37 – 40 is not only an advantageous strategy to prevent the self-stacking of graphene but also it facile to the electrochemical ORR 37 , 38 , 41 .…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-rich graphitic-carbon@graphene as a metal-free electrocatalyst for oxygen reduction reaction

Begum

Ahmed

Kim

2020

Sci Rep

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the metal-free nitrogen-doped graphitic-carbon@graphene (ng-c@G) is prepared from a composite of polyaniline and graphene by a facile polymerization following by pyrolysis for electrochemical oxygen reduction reaction (oRR). pyrolysis creates a sponge-like with ant-cave-architecture in the polyaniline derived nitrogenous graphitic-carbon on graphene. the nitrogenous carbon is highly graphitized and most of the nitrogen atoms are in graphitic and pyridinic forms with less oxygenated is found when pyrolyzed at 800 °C. The electrocatalytic activity of Ng-C@G-800 is even better than the benchmarked Pt/C catalyst resulting in the higher half-wave potential (8 mV) and limiting current density (0.74 mA cm −2) for oRR in alkaline medium. Higher catalytic performance is originated from the special porous structure at microscale level and the abundant graphitic-and pyridinic-n active sites at the nanoscale level on carbon-graphene matrix which are beneficial to the high O 2-mass transportation to those accessible sites. Also, it possesses a higher cycle stability resulting in the negligible potential shift and slight oxidation of pyridinic-n with better tolerance to the methanol. To save the world from day-by-day increasing energy demands and environmental concerns, the clean, highly efficient and renewable energy technologies are immediately required to be implemented 1. Among various renewable energy technologies, fuel cells (FCs) and metal-air batteries are regarded as the promising clean energy sources because of their high energy conversion efficiency and emission-free power generation 2,3. However, the efficiency of those technologies is strongly depend on the reaction kinetics which are involving with 4. For example, the sluggish kinetics of cathodic oxygen reduction reaction (ORR) hinders the overall performance of FCs 5. Thus, FCs require a highly active and durable electrocatalysts for increasing ORR kinetics. Although, Pt-based materials have been used as the state-of-the-art electrocatalysts for ORR because of their higher current density with lower overpotential compared to other electrocatalysts 6,7 , but their poor durability and prohibitive cost are hampering widespread usage of FCs technology in practical life 6,7. In recent past, researchers are focusing on nitrogen-doped carbon materials (NCMs) with various extrabeneficial features as metal-free ORR catalysts which shown to be an efficient, durable and carbon monoxide (CO)-poisoning-free substitute to Pt-based catalysts 4,8-10. Although, the previous research has shown that the significant improvement has done for ORR catalysis on NCMs, still the ORR performance needs to be improved 11. There are two important approaches are strongly correlated to the improvement of the ORR electrocatalytic activity of NCMs. One is to enhance the intrinsic activity of doped nitrogen and the other one is to increase the number of active sites 4. For enhancing the intrinsic activity of NCMs, they should be engineered to contain a high number of active sites with better exp...

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Water-Processable Laponite/Polyaniline/Graphene Oxide Nanocomposites for Energy Applications

Cited by 38 publications

References 60 publications

Fabrication of electric-stimuli responsive polyaniline/laponite composite and its viscoelastic and dielectric characteristics

Fabrication of electric-stimuli responsive polyaniline/laponite composite and its viscoelastic and dielectric characteristics

Nanosized microporous crystals: emerging applications

Nitrogen-rich graphitic-carbon@graphene as a metal-free electrocatalyst for oxygen reduction reaction

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