Silver-embedded zeolite thin film-based fiber optic sensor for in situ, real-time monitoring Hg2+ ions in aqueous media with high sensitivity and selectivity

Liu, Ning; Li, Liangxiong; Cao, Guanghua; Lee, Robert

doi:10.1039/c0jm02159h

Cited by 9 publications

(10 citation statements)

References 23 publications

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“…However, due to the solid support having a low specic surface area, it affects the reactivity and sensitivity of the sensor performance. [23][24][25][26][27][28][29][30] The features of a high surface area and good exibility are supposed to overcome these disadvantages. When comparing various techniques, electrospinning provides versatility for the fabrication of functional nanobers and incorporation of active agents into the nanober matrix.…”

Section: Introductionmentioning

confidence: 99%

Flexible and highly stable electrospun nanofibrous membrane incorporating gold nanoclusters as an efficient probe for visual colorimetric detection of Hg(ii)

2014

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Here, we describe the visual colorimetric detection of Hg2+ based on a flexible fluorescent electrospun nanofibrous membrane (NFM). It is an efficient approach, in which we have effectively integrated fluorescent gold nanoclusters (AuNC) into electrospun polyvinyl alcohol nanofibers. Interestingly, the resulting composite nanofibers (AuNC*NFM) are shown to retain the fluorescence properties of AuNC and exhibit red fluorescence under UV light, being cogent criteria for the production of a visual colorimetric sensor. Furthermore, capabilities with regard to the stability of the AuNC*NFM have been under observation for a period of six months, with conditions matching those of typical atmosphere, and the resulting outcome has thrown light on their long-term storability and usability. It is clear, from the fact that the nanofibrous membrane preserves the fluorescence ability up to a temperature of 100 °C, that temperature does not have an effect on the sensing performance in real-time application. The water-insoluble AuNC*NFM have been successfully tailored by cross-linking with glutaraldehyde vapor. Further, the contact mode approach has been taken into consideration for the visual fluorescent response to Hg2+, and the observed change of color indicates the utility of the composite nanofibers for onsite detection of Hg2+ with a detection limit of 1 ppb. The selectivity of the AuNC*NFM hybrid system has been analyzed by its response to other common toxic metal interferences (Pb2+, Mn2+, Cu2+, Ni2+, Zn2+, Cd2+) in water. Several unique features of the hybrid system have been determined, including high stability, self-standing ability, naked-eye detection, selectivity, reproducibility and easy handling-setting a new trend in membrane-based sensor systems. © 2014 the Partner Organisations

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Section: Introductionmentioning

confidence: 99%

Flexible and highly stable electrospun nanofibrous membrane incorporating gold nanoclusters as an efficient probe for visual colorimetric detection of Hg(ii)

2014

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“…Furthermore, Yin et al presented a novel pH sensor whose nanocavity was composed of polymeric overlays combined with complex NPs [53]. In another report, Ag NPs were allocated in zeolite thin films to detect Hg 2+ cations in aqueous solutions [54].…”

Section: Fabry-perotmentioning

confidence: 99%

Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

2015

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The use of nanoparticles (NPs) in scientific applications has attracted the attention of many researchers in the last few years. The use of NPs can help researchers to tune the physical characteristics of the sensing coating (thickness, roughness, specific area, refractive index, etc.) leading to enhanced sensors with response time or sensitivity better than traditional sensing coatings. Additionally, NPs also offer other special properties that depend on their nanometric size, and this is also a source of new sensing applications. This review focuses on the current status of research in the use of NPs within coatings in optical fiber sensing. Most used sensing principles in fiber optics are briefly described and classified into several groups: absorbance-based sensors, interferometric sensors, fluorescence-based sensors, fiber grating sensors, and resonance-based sensors, among others. For each sensor group, specific examples of the utilization of NP-embedded coatings in their sensing structure are reported.

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“…An important issue is the high sensitivity and selectivity over competing analytes. [65] Even, the incorporationo ff luorescent rhodamine units in the framework of the films would facilitate the generation of off-on systemso wing to structuralt ransformation from an on-emissive to highly emissive device,g iving a fast response towards Hg II detection.…”

Section: Opticalsensorsmentioning

confidence: 99%

“…In the case of Hg II sensing, a silver‐embedded organosiliceous thin film based fiber optic sensor, could be used for in situ real time monitoring of Hg II in aqueous solution. An important issue is the high sensitivity and selectivity over competing analytes . Even, the incorporation of fluorescent rhodamine units in the framework of the films would facilitate the generation of off‐on systems owing to structural transformation from a non‐emissive to highly emissive device, giving a fast response towards Hg II detection.…”

Section: Future Perspectives: Hybrid Materials As Sensorsmentioning

confidence: 99%

Organic‐Inorganic Hybrid Materials: Multi‐Functional Solids for Multi‐Step Reaction Processes

Díaz

Corma

2018

Chemistry A European J

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The design of new hybrid materials with tailored properties at the nano-, meso-, and macro-scale, with the use of structural functional nanobuilding units, is carried out to obtain specific multi-functional materials. Organization into controlled 1D, 2D, and 3D architectures with selected functionalities is key for developing advanced catalysts, but this is hardly accomplished using conventional synthesis procedures. The use of pre-formed nanostructures, derived either from known materials or made with specific innovative synthetic methodologies, has enormous potential in the generation of multi-site catalytic materials for one-pot processes. The present concept article introduces a new archetype wherein self-assembled nanostructured builder units are the base for the design of multifunctional catalysts, which combine catalytic efficiency with fast reactant and product diffusion. The article addresses a new generation of versatile hybrid organic-inorganic multi-site catalytic materials for their use in the production of (chiral) high-added-value products within the scope of chemicals and fine chemicals production. The use of those multi-reactive solids for more nanotechnological applications, such as sensors, due to the inclusion of electron donor-acceptor structural arrays is also considered, together with the adsorption-desorption capacities due to the combination of hydrophobic and hydrophilic sub-domains. The innovative structured hybrid materials for multipurpose processes here considered, can allow the development of multi-stage one-pot reactions with industrial applications, using the materials as one nanoreactor systems, favoring more sustainable production pathways with economic, environmental and energetic advantages.

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Silver-embedded zeolite thin film-based fiber optic sensor for in situ, real-time monitoring Hg2+ ions in aqueous media with high sensitivity and selectivity

Cited by 9 publications

References 23 publications

Flexible and highly stable electrospun nanofibrous membrane incorporating gold nanoclusters as an efficient probe for visual colorimetric detection of Hg(ii)

Flexible and highly stable electrospun nanofibrous membrane incorporating gold nanoclusters as an efficient probe for visual colorimetric detection of Hg(ii)

Optical Fiber Sensors Based on Nanoparticle-Embedded Coatings

Organic‐Inorganic Hybrid Materials: Multi‐Functional Solids for Multi‐Step Reaction Processes

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