High efficiency SiO2–TiO2 hybrid sol-gel antireflective coating for infrared applications

Brinley, Erik; Seal, Sayan; Folks, R.; Braunstein, Edit; Kramer, Leslie

doi:10.1116/1.2210007

Cited by 17 publications

(9 citation statements)

References 23 publications

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“…Under other conditions containing SiO 2 (Si 0.2 ‒Si 0.4 ), TiO 2 remains, but the spectral intensity of Ti 2p weakens because the TiO 2 component is substituted by the SiO 2 component. Peaks in O 1s appear at 532.78 and 532.2 eV, which are attributed to SiO 2 . In particular, the peaks of Si 2p at 103.52 and 103.11 eV coincide with amorphous SiO 2 .…”

Section: Characterization Of the Porous Sio2/tio2 Composite Filmmentioning

confidence: 88%

SiO₂/TiO₂ Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

Lee

Kim

et al. 2017

Adv Funct Materials

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In this study, partially crystalline anodic TiO 2 with SiO 2 well-distributed througout the entire oxide film is prepared using plasma electrolytic oxidation (PEO) to obtain a high-capacity anode with an excellent cycling stability for Li-ion batteries. The micropore sizes in the anodic film become inhomogeneous as the SiO 2 content is increased from 0% to 25%. The X-ray diffraction peaks show that the formed oxide contains the anatase and rutile phases of TiO 2 . In addition, X-ray photoelectron spectroscopy and energy-dispersive X-ray analyses confirm that TiO 2 contains amorphous SiO 2 . Anodic oxides of the SiO 2 /TiO 2 composite prepared by PEO in 0.2 m H 2 SO 4 and 0.4 m Na 2 SiO 3 electrolyte deliver the best performance in Li-ion batteries, exhibiting a capacity of 240 µAh cm −2 at a fairly high current density of 500 µA cm -2 . The composite film shows the typical Li-TiO 2 and Li-SiO 2 redox peaks in the cyclic voltammogram and a corresponding plateau in the galvanostatic charge/discharge curves. The as-prepared SiO 2 /TiO 2 composite anode shows at least twice the capacity of other types of binder-free TiO 2 and TiO 2 composites and very stable cycling stability for more than 250 cycles despite the severe mechanical stress.

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Section: Characterization Of the Porous Sio2/tio2 Composite Filmmentioning

confidence: 88%

SiO₂/TiO₂ Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

Lee

Kim

et al. 2017

Adv Funct Materials

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“…The sol-gel process is one of the techniques most commonly used to produce high quality and tailor-made ceramic membranes. Particle size is one of the most important aspects of sol-gels [39]. The pore size of membranes is dictated by the size of the particles in the sol used for membrane fabrication [40].…”

Section: Xrdmentioning

confidence: 99%

Dual function filtration and catalytic breakdown of organic pollutants in wastewater using ozonation with titania and alumina membranes

Zhu

Kennedy

et al. 2011

Journal of Membrane Science

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Water recycling via treatment from industrial and/or municipal waste sources is one of the key strategies for resolving water shortages worldwide. Polymer membranes are effective at improving the water quality essential for recycling, but depend on regular cleaning and replacement. Pure ceramic membranes can reduce the cleaning need and last significantly longer in the same applications whilst possessing the possibility of operating in more aggressive environments not suitable for polymers. In the current work, filtration using a tubular ceramic membrane (α-Al 2 O 3 or TiO 2 ) was combined with ozonation to remove organic compounds present in a secondary effluent to enhance key quality features of the water (colour and total organic carbon, TOC) for its potential reuse.'Bare' commercial α-Al 2 O 3 filters (pore size ~0.58 µm) were tested as a microfiltration membrane and compared with the more advanced catalytically active TiO 2 layer that was formed by the sol-gel method. The presence of anatase with a 4 nm pore size at the membrane surface was confirmed by Xray diffraction (XRD) and N 2 adsorption. Filtration of the effluent over a 2 hour period led to a reduction in flux to 45% and 60% of the initial values for the α-alumina and TiO 2 membrane, respectively. However, a brief dose (2 mins) of ozone at the start of the run resulted in reductions to only 70% of the initial flux for both membranes. It is likely that the oxide's functional property Interestingly, the porous structure therefore acted in a synergistic, dual function mode to physically separate the particulates whilst also catalytically breaking down organic matter. The system also greatly improved the efficiency of membrane filtration for the reduction of colour, A 254 (organics absorption at the wavelength of 254 nm) and TOC. The best performance came from combined ozonation (2 min ozonation time with an estimated applied ozone dose of 8 mg L -1 ) with the TiO 2 membrane, which was able to reduce colour by 88%, A 254 by 75% and TOC by 43%. It is clearly evident that a synergistic effect occurs with the process combination of ozonation and ceramic membrane filtration demonstrating the practical benefit of combining ceramic membrane filtration with conventional water ozonation.

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“…There are many coating methods intended for metal coating, such as sol-gel [8], electroless plating [9], physical deposition [10], chemical deposition [11] and heterogeneous precipitation [12−13]. The heterogeneous precipitation−thermal reduction process has been intensively investigated recently due to its lower cost and facility to obtain well-distributed particles on the coating layers.…”

Section: Introductionmentioning

confidence: 99%

Preparation and sintering of nano Fe coated Si3N4 composite powders

Yin

Fan

Liu

2009

J. Cent. South Univ. Technol.

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Fe/Si 3 N 4 composite powder was synthesized by the heterogeneous precipitation-thermal reduction process, and then pressed into flakes under a pressure of 10 MPa. Flakes were sintered by pressureless and hot-pressing at 1 600 ℃ under 0.1 MPa N 2 . The chemical composition, phases and microstructure of composite powder and sintered flakes were investigated by energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that the structure of composite powders is Si 3 N 4 coated by nano Fe. The crystal phases of sintered flakes by pressureless are Fe(Si) compound, SiC and Si 3 N 4 . The crystal phases of the sintered samples by hot-pressing are Fe, Fe(Si) compound and Si 3 N 4 . It is found that crystal phases flakes obtained by pressureless and hot-pressing are very different.

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High efficiency SiO2–TiO2 hybrid sol-gel antireflective coating for infrared applications

Cited by 17 publications

References 23 publications

SiO₂/TiO₂ Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

SiO₂/TiO₂ Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

Dual function filtration and catalytic breakdown of organic pollutants in wastewater using ozonation with titania and alumina membranes

Preparation and sintering of nano Fe coated Si3N4 composite powders

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High efficiency SiO2–TiO2 hybrid sol-gel antireflective coating for infrared applications

Cited by 17 publications

References 23 publications

SiO2/TiO2 Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

SiO2/TiO2 Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

Dual function filtration and catalytic breakdown of organic pollutants in wastewater using ozonation with titania and alumina membranes

Preparation and sintering of nano Fe coated Si3N4 composite powders

Contact Info

Product

Resources

About

SiO₂/TiO₂ Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes

SiO₂/TiO₂ Composite Film for High Capacity and Excellent Cycling Stability in Lithium‐Ion Battery Anodes