Fine tuning the coverage of a titanate nanowire layer on a glass substrate

Darányi, Mária; Kukovecz, Ákos; Horváth, Endre; Kiricsi, Imre

doi:10.1016/j.cplett.2008.05.084

Cited by 7 publications

(11 citation statements)

References 28 publications

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“…Similar patterns were obtained in the work of Darányi et al, 38 Suzuki et al 39 and in work of Bavykin and Walsh. 40 Additional peaks were at the 24.9° (110) and 48.4° (020).…”

Section: Acs Paragon Plus Environmentsupporting

confidence: 81%

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO₂ Nanomaterials

et al. 2015

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The present research focuses on the comparative investigation of the acid-base surface properties (the isoelectric point, pH iep and point of zero charge, pH pzc ) of one-dimensional TiO 2 nanomaterials. Different one-dimensional TiO 2 nanomaterials, nanotubes (NTs) and nanowires (NWs) were prepared by an alkaline hydrothermal synthesis procedure. The structural properties of the synthesized TiO 2 nanomaterials were investigated with high-resolution scanning electron microscopy (HR-SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HR-TEM), atomic force microscopy (AFM), powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The NWs and NTs were characterized using Raman and Fourier transform infrared (FT-IR) spectroscopy as well as Brunauer-EmmettTeller (BET) measurements. Surface properties, i.e. pH iep and pH pzc of NWs and NTs were determined from electrokinetic measurements, potentiometric mass and electrolyte titrations. The relative acidity for the NWs is found to be in the interval 3 < pH iep < 4 in comparison with the NTs, with 4

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“…Similar patterns were obtained in the work of Darányi et al, 38 Suzuki et al 39 and in work of Bavykin and Walsh. 40 Additional peaks were at the 24.9° (110) and 48.4° (020).…”

Section: Acs Paragon Plus Environmentsupporting

confidence: 81%

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO₂ Nanomaterials

et al. 2015

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“…The elongated titanate nanowires have a diameter of 30–100 nm and an average length of about 3 μm. Once deposited on the substrate they form an interconnected network, covering 55% of the surface, estimated from the analysis of the SEM images . This solution-based patterning technique resulted in an about 20% transmittance loss as compared to the uncoated glass (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…Titanate nanowires (H 2 Ti 3 O 7 ) have been prepared following the procedures reported in refs − and − . Nanowire dispersion was prepared by adding 0.25 g H 2 Ti 3 O 7 nanowire in 100 mL of 2-propanol (>99.8% Merck), and the mixture is homogenized with an ultrasonic tip (Bandelin Sonopuls, Microtip MS73) at 10% amplitude for 30 min.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Once deposited on the substrate they form an interconnected network, covering 55% of the surface, estimated from the analysis of the SEM images. 28 This solution-based patterning technique resulted in an about 20% transmittance loss as compared to the uncoated glass (Figure 1). The low transparency loss is similar to the case of TiO 2 nanoparticle coatings 11,33 and it does not impair optical use.…”

Section: Optical and Photocatalytic Propertiesmentioning

confidence: 99%

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Superior Water Sheeting Effect on Photocatalytic Titania Nanowire Coated Glass

Náfrádi

Martin-Hamka

et al. 2017

Langmuir

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Simple, rapid, and inexpensive fabrication of self-cleaning glass surfaces based on wet chemical deposition of HTiO (trititanate) and subsequent transformation of it into TiO (anatase) nanowires on pristine glass surfaces is reported. Despite the low, 55%, surface coverage, the nanowire roughened glass surface showed self-cleaning properties comparable to much thicker, over 100-nm-thick, TiO nanoparticle coated glasses. The superwettable surface showed 12° contact angle. Moreover, ultraviolet (UV) and natural light activated photocatalysis remained effective at enhancing the self-cleaning process in the case of the TiO nanowire coated glass. Time-resolved study of the water droplet spread in millisecond time scales revealed that capillary forces induced by the random nanowire network significantly enhance the water sheeting effect of these textured glass surfaces. Time-resolved experiments revealed that the spreading velocity of the droplets were enhanced by 19% for the TiO nanowire roughened surface and reached a v = 508 mm/s initial spreading speed. Outdoor experiments validated the concept that TiO nanowire coated glass possess self-cleaning properties with significantly reduced titania content compared to nanoparticle based films.

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“…Since the effect of any single variable can usually be accounted for by a second-order polynomial, it is customary to test parameters at three different levels: a high, a medium and a low setting. Such designs, called three-level full factorial designs, have been applied successfully in the past to optimize the synthesis of carbon nanotubes [20,30], the deposition of titanate nanowires on glass [31] and the wet peroxidation of aqueous phenol solution [32]. The simplest three-level full factorial design is to pick three values for one independent variable (x 1 : rotation speed), chart the three corresponding response (d: particle diameter) values in a standard two dimensional Cartesian coordinate system and fit the d = f(x 1 ) function by a parabola.…”

Section: Introductionmentioning

confidence: 99%

Study of the parameters influencing the co-grinding process for the production of meloxicam nanoparticles

et al. 2011

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Co-grinding is a procedure for the preparation of nanoparticles in which the drug is ground together with one or more excipients. The grinding of meloxicam, a crystalline solid, together with amorphous polyvinylpyrrolidone (PVP) or semi-crystalline polyethylene glycol (PEG) as excipients, is expected to lead to a drastic reduction in particle size. We optimized meloxicam grinding using a three level full factorial response surface design. In the case of PVP the optimum co-grinding parameter set in our study proved to be a meloxicam to PVP-C30 ratio of 1:1, and a rotation frequency of 400 rpm. The best size reduction was achieved at a meloxicam to PEG 6000 ratio = 1:2 at a rotation frequency of 400 rpm: nanoparticles averaging d SEM = 174 nm in diameter and with a very narrow size distribution (standard deviation 35% of mean) were obtained. X-ray powder diffraction analysis indicated that the optimized products contained amorphous meloxicam nanoparticles in the PVP-C30 composition, although meloxicam nanocrystals could also be detected in the samples which contained PEG 6000. The dissolution properties were significantly increased under nasal conditions (pH 5.1, temperature 30°C), especially in the case of the amorphous product. Such dry powder systems can offer novel opportunities in systemic nasal drug delivery.

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Fine tuning the coverage of a titanate nanowire layer on a glass substrate

Cited by 7 publications

References 28 publications

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO₂ Nanomaterials

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO₂ Nanomaterials

Superior Water Sheeting Effect on Photocatalytic Titania Nanowire Coated Glass

Study of the parameters influencing the co-grinding process for the production of meloxicam nanoparticles

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Fine tuning the coverage of a titanate nanowire layer on a glass substrate

Cited by 7 publications

References 28 publications

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO2 Nanomaterials

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO2 Nanomaterials

Superior Water Sheeting Effect on Photocatalytic Titania Nanowire Coated Glass

Study of the parameters influencing the co-grinding process for the production of meloxicam nanoparticles

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An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO₂ Nanomaterials

An Experimental and Theoretical Approach to Understanding the Surface Properties of One-Dimensional TiO₂ Nanomaterials