A smart nanofibrous material for adsorbing and detecting elemental mercury in air

Macagnano, Antonella; Perri, Viviana; Zampetti, Emiliano; Bearzotti, Andrea; Cesare, Fabrizio De; Sprovieri, Francesca; Pirrone, Nicola

doi:10.5194/acp-17-6883-2017

Cited by 6 publications

(3 citation statements)

References 45 publications

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“…Therefore, the environmental monitoring and occupational health evaluation would require that sensitive mercury samplers were cheap, rapid and wearable. Gold nanoparticles decorating nanofibers of TiO 2 have been designed to adsorb and reveal mercury from the air up to between 6 and 2 ppt vol [ 45 ]. Salcedo et al (2018) developed a device based on a cuprous iodide/polystyrene composite for mercury, exhibiting reddish color in the presence of Hg 0 [ 46 ].…”

Section: Introductionmentioning

confidence: 99%

Characteristics and Performances of a Nanostructured Material for Passive Samplers of Gaseous Hg

Avossa

Cesare

Papa

et al. 2020

Sensors

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Passive air samplers (PASs) have been used for mapping gaseous mercury concentration in extensive areas. In this work, an easy-to-use and -prepare gold nanoparticle (NP)-based PAS has been investigated. The PAS is constituted of a microfibrous quartz disk filter impregnated of gold NP photo-growth on TiO2 NPs (Au@TiO2) and used as gaseous mercury adsorbing material. The disk was housed in a cylinder glass container and subjected to an axial diffusive sampling. The adsorbed mercury was measured by thermal desorption using a Tekran® instrument. Different amounts of Au@TiO2 (ranging between 4.0 and 4.0 × 10−3 mg) were deposited by drop-casting onto the fibrous substrate and assessed for about 1 year of deployment in outdoor environment with a mercury concentration mean of about 1.24 ± 0.32 ng/m3 in order to optimize the adsorbing layer. PASs showed a linear relation of the adsorbed mercury as a function of time with a rate of 18.5 ± 0.4 pg/day (≈1.5% of the gaseous concentration per day). However, only the PAS with 4 mg of Au@TiO2, provided with a surface density of about 3.26 × 10−2 mg/mm2 and 50 μm thick inside the fibrous quartz, kept stability in working, with a constant sampling rate (SR) (0.0138 ± 0.0005 m3/day) over an outdoor monitoring experimental campaign of about 1 year. On the other hand, higher sampling rates have been found when PASs were deployed for a few days, making these tools also effective for one-day monitoring. Furthermore, these PASs were used and re-used after each thermal desorption to confirm the chance to reuse such structured layers within their samplers, thus supporting the purpose to design inexpensive, compact and portable air pollutant sampling devices, ideal for assessing both personal and environmental exposures. During the whole deployment, PASs were aided by simultaneous Tekran® measurements.

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Section: Introductionmentioning

confidence: 99%

Characteristics and Performances of a Nanostructured Material for Passive Samplers of Gaseous Hg

Avossa

Cesare

Papa

et al. 2020

Sensors

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“…Nanofibers have attracted growing attention due to their high surface area, highly porous structure, narrow pore size, and low density. The superior properties of nanofibers enable their use in various fields, such as wastewater filtration [1,2], distillation [3,4], desalination [5,6], air filtration [7,8], biomedical application [9,10], gas sensors [11,12], batteries [13,14], data storage [15], and solar cells [16]. Apart from their many advantages, the weak mechanical properties of nanofibers restrict their use in a wider variety of applications.…”

Section: Introductionmentioning

confidence: 99%

Polyvinyl Butyral (PVB) Nanofiber/Nanoparticle-Covered Yarns for Antibacterial Textile Surfaces

Yalçinkaya

Komárek

2019

IJMS

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In this study, nanoparticle-incorporated nanofiber-covered yarns were prepared using a custom-made needle-free electrospinning system. The ultimate goal of this work was to prepare functional nanofibrous surfaces with antibacterial properties and realize high-speed production. As antibacterial agents, we used various amounts of copper oxide (CuO) and vanadium (V) oxide (V2O5) nanoparticles (NPs). Three yarn preparation speeds (100 m/min, 150 m/min, and 200 m/min) were used for the nanofiber-covered yarn. The results indicate a relationship between the yarn speed, quantity of NPs, and antibacterial efficiency of the material. We found a higher yarn speed to be associated with a lower reduction in bacteria. NP-loaded nanofiber yarns were proven to have excellent antibacterial properties against Gram-negative Escherichia coli (E. coli). CuO exhibited a greater inhibition and bactericidal effect against E. coli than V2O5. In brief, the studied samples are good candidates for use in antibacterial textile surface applications, such as wastewater filtration. As greater attention is being drawn to this field, this work provides new insights regarding the antibacterial textile surfaces of nanofiber-covered yarns.

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“…Electrospun polymeric nanofiber web has gained increasing importance in the production of engineered surfaces with sub-micron to nano-scale fibers. The widely employed areas of electrospun nanofibers are tissue engineering [ 1 , 2 ], wound healing [ 3 ], drug delivery systems [ 4 ], composites [ 5 ], solar cells [ 6 ], protective clothing [ 7 ], lithium-ion batteries [ 8 , 9 ], sensors [ 10 , 11 , 12 ], gas sensors and separators [ 13 , 14 ], and air and water filtration [ 15 , 16 , 17 , 18 , 19 ], owing to their high surface-area-to-volume ratio, highly porous structure and extremely narrow pore size. The main factor influencing the application of nanofibers is their mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration

Yalçinkaya

Hrůza

2018

Nanomaterials

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In the new century, electrospun nanofibrous webs are widely employed in various applications due to their specific surface area and porous structure with narrow pore size. The mechanical properties have a major influence on the applications of nanofiber webs. Lamination technology is an important method for improving the mechanical strength of nanofiber webs. In this study, the influence of laminating pressure on the properties of polyacrylonitrile (PAN) and polyvinylidene fluoride (PVDF) nanofibers/laminate was investigated. Heat-press lamination was carried out at three different pressures, and the surface morphologies of the multilayer nanofibrous membranes were observed under an optical microscope. In addition, air permeability, water filtration, and contact angle experiments were performed to examine the effect of laminating pressure on the breathability, water permeability and surface wettability of multilayer nanofibrous membranes. A bursting strength test was developed and applied to measure the maximum bursting pressure of the nanofibers from the laminated surface. A water filtration test was performed using a cross-flow unit. Based on the results of the tests, the optimum laminating pressure was determined for both PAN and PVDF multilayer nanofibrous membranes to prepare suitable microfilters for liquid filtration.

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A smart nanofibrous material for adsorbing and detecting elemental mercury in air

Cited by 6 publications

References 45 publications

Characteristics and Performances of a Nanostructured Material for Passive Samplers of Gaseous Hg

Characteristics and Performances of a Nanostructured Material for Passive Samplers of Gaseous Hg

Polyvinyl Butyral (PVB) Nanofiber/Nanoparticle-Covered Yarns for Antibacterial Textile Surfaces

Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration

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