Enhanced photocatalytic performance of novel electrospun BN/TiO<sub>2</sub> composite nanofibers

Nasr, Maryline; Viter, Roman; Eid, Cynthia; Habchi, Roland; Miele, Philippe; Bechelany, Mikhaël

doi:10.1039/c6nj03088b

Cited by 82 publications

(74 citation statements)

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“…PAN solution containing Ag nanoparticles was loaded in a 12 ml syringe with an attached 0.7 mm diameter needle. A syringe pump (KDS 100, KDScientific) was used to feed the solution in the electrospinning lab-made system [49]. The flow rate of the solution was fixed to 0.2 ml/h and 25 kV power was supplied using a High Voltage Power Supply (T1CP 300 304n-iSeg).…”

Section: Preparation Of Ag/pan Nanofibersmentioning

confidence: 99%

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Bortolassi

Nagarajan

Lima

et al. 2019

Materials Science and Engineering: C

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173

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Human exposure to air pollution and especially to nanoparticles is increasing due to the combustion of carbon-based energy vectors. Fibrous filters are among the various types of equipment potentially able to remove particles from the air. Nanofibers are highly effective in this area; however, their utilization is still a challenge due to the lack of studies taking into account both nanoparticle collection efficiency and antibacterial effect. The aim of this work is to produce and evaluate novel silver/polyacrylonitrile (Ag/PAN) electrospun fibers deposited on a nonwoven substrate to be used as air filters to remove nanoparticles from the air and also showing antibacterial activity. In order to determine the optimum manufacturing conditions, the effects of several electrospinning process parameters were analyzed such as solution concentration, collector to needle distance, flow rate, voltage, and duration. Ag/PAN nanofibers were characterized by Xray diffraction (XRD), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red spectroscopy (FTIR), Energy-dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and Scanning Electron Microscopy (SEM). In addition, filtration performances were determined by measuring the pressure drop and collection efficiency of sodium chloride (NaCl) aerosol particles (9 to 300 nm diameters) using Scanning Mobility Particle Sizers (SMPS). Filters with high filtration efficiency (≈100%) and high-quality factor (≈0.05 Pa -1 ) were obtained even adding different concentrations of Ag nanoparticles (AgNPs) to PAN nanofibers. The resultant Ag/PAN nanofibers showed excellent antibacterial activity against 10 4 CFU/ml E.coli bacteria.The crystallinity of the silver nanoparticles was analyzed using X-ray diffraction analysis and shown in Figure S1. The peak observed at 17° for the 0AgF samples corresponds to (110) plan of PAN. Crystalline peak corresponds to silver nanoparticles were absent in all samples (1AgF, 10AgF, and 50AgF) which is due to the small size (<5nm) of silver nanoparticles.

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Section: Preparation Of Ag/pan Nanofibersmentioning

confidence: 99%

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Bortolassi

Nagarajan

Lima

et al. 2019

Materials Science and Engineering: C

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173

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“…TiO 2 is acclaimed as a UV‐light photocatalytic. To enhance TiO 2 performance in visible light, many approaches investigate the doping of TiO 2 with metal transitions . While doping, a disordered structure could appear in TiO 2 , limiting the efficiency of this approach.…”

Section: Applicationsmentioning

confidence: 99%

“…To enhance TiO 2 performance in visible light, many approaches investigate the doping of TiO 2 with metal transitions. [111][112][113] While doping, a disordered structure could appear in TiO 2 , limiting the efficiency of this approach. Perovskite structure ABO 3 has been investigated because A site is shared by two cations without causing a disordered lattice.…”

Section: Photocatalytic Propertiesmentioning

confidence: 99%

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

et al. 2019

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Investigations focusing on electrical energy storage capacitors especially the dielectric ceramic capacitors for high energy storage density are attracting more and more attention in the recent years. Ceramic capacitors possess a faster charge‐discharge rate and improved mechanical and thermal properties compared with other energy storage devices such as batteries. The challenge is to obtain ceramic capacitors with outstanding mechanical, thermal and storage properties over large temperature and frequencies ranges. ABO 3 as a type of perovskites showed a strong piezoelectric, dielectric, pyroelectric, and electro‐optic properties useful as energy storage and environmental devices. CaCu 3 Ti 4 O 12 (CCTO) perovskite with cubic lattice (Im3 symmetry) was discovered to have a colossal dielectric constant (10 4 ) that is stable over a wide range of frequencies (10 Hz–1 MHz) and temperature independence (100–300 K). The origin of this high dielectric constant is not fully established, specially because it is the same for single crystal and thin films. In this review, the history of CCTO will be introduced. The synthesis and the sintering approaches, the dopant elements used as well as the applications of CCTO will be reported. In addition to dielectrical properties useful to energy storage devices; CCTO could serve as photocatalytic materials with a very good performance in visible light.

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“…For instance, photocatalysis, "a green technology",p lays an important role in solar-energy conversion owing to its potential to solve energy and environmental problems. [27,28] Anatase, rutile, and brookite are the main crystalline phases of TiO 2 .T he three crystalline phases are all made up of an octahedron of oxygen atoms aroundatitanium atom (TiO 6 octahedras) but with different organizationsd epending on the kind of phase. However, fast charge recombination and an absorption edge in the UV range limit the photocatalytic efficiency of TiO 2 under visible-light irradiation.…”

Section: Introductionmentioning

confidence: 99%

“…[25] Till now,t itaniumd ioxide is the most photoactive material [26] owing to its oxidizing ability, chemicals tability, and low cost. [27,28] Anatase, rutile, and brookite are the main crystalline phases of TiO 2 .T he three crystalline phases are all made up of an octahedron of oxygen atoms aroundatitanium atom (TiO 6 octahedras) but with different organizationsd epending on the kind of phase. Rutile is the most abundant form and crystallizes in the quadratic Bravais network.…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

et al. 2018

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Environmental and energy problems have drawn much attention owing to rapid population growth and accelerated economic development. For instance, photocatalysis, "a green technology", plays an important role in solar-energy conversion owing to its potential to solve energy and environmental problems. Recently, many efforts have been devoted to improving visible-light photocatalytic activity by using titanium dioxide as a photocatalyst as a result of its wide range of applications in the energy and environment fields. However, fast charge recombination and an absorption edge in the UV range limit the photocatalytic efficiency of TiO under visible-light irradiation. Many investigations have been undertaken to overcome the limitations of TiO and, therefore, to enhance its photocatalytic activity under visible light. The present literature review focuses on different strategies used to promote the separation efficiency of electron-hole pairs and to shift the absorption edge of TiO to the visible region. Current synthesis techniques used to elaborate several nanostructures of TiO -based materials, recent progress in enhancing visible photocatalytic activity, and different photocatalysis applications will be discussed. On the basis of the studies reported in the literature, we believe that this review will help in the development of new strategies to improve the visible-light photocatalytic performance of TiO -based materials further.

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Enhanced photocatalytic performance of novel electrospun BN/TiO₂ composite nanofibers

Abstract: We report the elaboration of novel BN/TiO2 composite nanofibers with different amounts of BN sheets and their photocatalytic activity under UV irradiation.

Cited by 82 publications

References 50 publications

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

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Enhanced photocatalytic performance of novel electrospun BN/TiO2 composite nanofibers

Abstract: We report the elaboration of novel BN/TiO2 composite nanofibers with different amounts of BN sheets and their photocatalytic activity under UV irradiation.

Cited by 82 publications

References 50 publications

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

Efficient nanoparticles removal and bactericidal action of electrospun nanofibers membranes for air filtration

From Synthesis to Applications: Copper Calcium Titanate (CCTO) and its Magnetic and Photocatalytic Properties

Recent Progress on Titanium Dioxide Nanomaterials for Photocatalytic Applications

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Product

Resources

About

Enhanced photocatalytic performance of novel electrospun BN/TiO₂ composite nanofibers