Synthesis of silver-anchored polyaniline–chitosan magnetic nanocomposite: a smart system for catalysis

Ayad, Mohamad M.; Amer, Wael A.; Kotp, Mohammed G.; Minisy, Islam M.; Rehab, Ahmed; Kopecký, Dušan; Fitl, Přemysl

doi:10.1039/c7ra02575k

Cited by 66 publications

(31 citation statements)

References 66 publications

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“…Great efforts have been devoted toward the preparation of CP nanomaterials for the fabrication of miniaturized novel flexible sensor platforms that enable portability and high-density arrays because of using small sample amounts, which offer excellent prospects in sensor nanotechnology for advanced detection systems [21]. Recent studies have demonstrated the synthesis of nanostructured CPs with controlled shape and size, which ranged from lithographic techniques to chemical methods [22][23][24][25][26][27][28][29][30][31][32][33]. Stejskal and coworkers demonstrated synthesizing PANI nanostructures and its derivatives by the chemical oxidative polymerization in water [34][35][36].…”

Section: Synthesis Of Nanostructured Conducting Polymersmentioning

confidence: 99%

Gas Sensors Based on Conducting Polymers

Torad¹,

Ayad²

2020

Gas Sensors

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Since the discovery of conducting polymers (CPs), their unique properties and tailor-made structures on-demand have shown in the last decade a renaissance and have been widely used in fields of chemistry and materials science. The chemical and thermal stability of CPs under ambient conditions greatly enhances their utilizations as active sensitive layers deposited either by in situ chemical or by electrochemical methodologies over electrodes and electrode arrays for fabricating gas sensor devices, to respond and/or detect particular toxic gases, volatile organic compounds (VOCs), and ions trapping at ambient temperature for environmental remediation and industrial quality control of production. Due to the extent of the literature on CPs, this chapter, after a concise introduction about the development of methods and techniques in fabricating CP nanomaterials, is focused exclusively on the recent advancements in gas sensor devices employing CPs and their nanocomposites. The key issues on nanostructured CPs in the development of state-of-the-art miniaturized sensor devices are carefully discussed. A perspective on next-generation sensor technology from a material point of view is demonstrated, as well. This chapter is expected to be comprehensive and useful to the chemical community interested in CPs-based gas sensor applications.

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Section: Synthesis Of Nanostructured Conducting Polymersmentioning

confidence: 99%

Gas Sensors Based on Conducting Polymers

Torad¹,

Ayad²

2020

Gas Sensors

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“…Aerward, 0.5 mL of freshly prepared NaBH 4 solution (10 mg mL À1 ) was added to the previous solution, then the reduction progress was monitored via the measurement of the absorption spectra over time. 31…”

Section: Catalytic Activity Of Mtps Nanocompositementioning

confidence: 99%

Rational design of a polypyrrole-based competent bifunctional magnetic nanocatalyst

2019

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“…Further, anchoring metal NPs into mesostructured materials realizes a promising catalytic activity, while the stability and reusability of the non-supported NPs are the major drawbacks [26]. In order to overcome this problem, efforts have been devoted toward anchoring metal NPs in solid supports, especially nanostructured solid support such as mesoporous silica and nanostructured polymer to realize composite catalysts having high performances without affecting the overall catalytic activity of individual metal NPs [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Study on catalytic efficiency of platinum and silver nanoparticles confined in nanosized channels of a 3-D mesostructured silica

et al. 2020

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A scalable route to encapsulate homogeneously fine Pt and Ag nanoparticles (NPs) inside amine-functionalized KIT-6 mesochannels via two different reduction routes as heterogeneous mesoporous catalysts is demonstrated. The active amine groups functionalized KIT-6 mesochannels act as anchor sites to immobilize the homogeneous Pt and Ag NPs catalysts with small-sized NPs of approximately 6.0 and 3.0 nm, respectively. The catalysts were fully characterized, and the surface areas were relatively decreased after deposition of the metals NPs. Even after metal NPs deposition, the mesochannels are readily accessible for enhancing their catalytic activity. The meso-KIT-6-Pt catalyst synthesized with ascorbic acid (AA) reduction route shows a higher catalytic efficiency for the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) with a reaction rate almost 2 times higher than that of the meso-KIT-6-Ag synthesized using formaldehyde. The as-prepared mesoporous catalysts exhibit a good reusability, with a high catalytic efficiency for at least 5 successive cycles without an obvious loss in their catalytic activity. The influences of reaction parameters, such as catalyst dose, reaction temperarture and nature of solvent on the catalytic performance of the mesoporous catalysts are of the main study.

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Synthesis of silver-anchored polyaniline–chitosan magnetic nanocomposite: a smart system for catalysis

Abstract: A novel and smart four component system composed of chitosan, polyaniline, magnetite and silver was exploited for catalysis.

Cited by 66 publications

References 66 publications

Gas Sensors Based on Conducting Polymers

Gas Sensors Based on Conducting Polymers

Rational design of a polypyrrole-based competent bifunctional magnetic nanocatalyst

Study on catalytic efficiency of platinum and silver nanoparticles confined in nanosized channels of a 3-D mesostructured silica

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