scholarly journals Mechanistic insight into the non-hydrolytic sol–gel process of tellurite glass films to attain a high transmission

RSC Advances ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 2404-2415
Author(s):  
Xuanzhao Pan ◽  
Jiangbo Zhao ◽  
Gujie Qian ◽  
Xiaozhou Zhang ◽  
Yinlan Ruan ◽  
...  
Keyword(s):  
Tellurite Glass ◽  
Sol Gel ◽  
Amorphous Film ◽  
High Refractive Index ◽  
Functional Nanoparticles ◽  
Mechanistic Insight ◽  
Sol Gel Process ◽  
Transmission Window ◽  
Insight Into ◽  
Generation Hybrid

This work develops a high-transparency amorphous film with a wide transmission window and high refractive index, which can potentially meet the strong demand of integrating functional nanoparticles for the next-generation hybrid optoelectronic films.

Deep insight into the luminescence performance of Li2MgSiO4:Mn2+ green phosphor synthesized by a sol-gel process

2021 ◽  
pp. 118563
Author(s):  
Zihao Wang ◽  
Jiajun Yu ◽  
Fei Tang ◽  
Changcheng Zheng ◽  
Lizhen Zhang ◽  
...  
Keyword(s):  
Sol Gel ◽  
Deep Insight ◽  
Green Phosphor ◽  
Sol Gel Process ◽  
Insight Into ◽  
Luminescence Performance

scholarly journals Gel Based Sunscreen Containing Surface Modified TiO2Obtained by Sol-Gel Process: Proposal for a Transparent UV Inorganic Filter

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Marina Paiva Abuçafy ◽  
Eloísa Berbel Manaia ◽  
Renata Cristina Kiatkoski Kaminski ◽  
Victor Hugo Sarmento ◽  
Leila Aparecida Chiavacci
Keyword(s):  
Diffuse Reflectance Spectroscopy ◽  
Sol Gel ◽  
Chemical Properties ◽  
High Refractive Index ◽  
Inorganic Materials ◽  
Continuous Exposure ◽  
Sol Gel Process ◽  
Surface Modified ◽  
Physical And Chemical ◽  
Gel Formulations

Inorganic UV filters, as titanium dioxide (TiO2), have become attractive because of their role in protecting the skin against the damage caused by the continuous exposure to the sun. However, their high refractive index, responsible for a white residue when applied on the skin, has led to the development of alternative inorganic materials, such as TiO2nanoparticles. Thus, the aim of this study was the development of transparent and stable gel formulations containing surface modified TiO2nanoparticles for application in sunscreens. Also, the physical and chemical properties of formulations containing TiO2nanoparticles were evaluated. The UV absorption spectroscopy analyses indicated that the formulations containing TiO2nanoparticles had a broad protection spectrum. The diffuse reflectance spectroscopy revealed that the use of PTSH surface modified TiO2nanoparticles improved the transparency of the sunscreen formulations compared to that containing commercial ones. The rheology analyses showed that the amount of nanoparticles incorporated in the formulations influences the gel-like or liquid-like behavior. The results showed that the surface modified TiO2nanoparticles are a promising innovative UV filter and the formulations containing these nanoparticles are interesting candidates for being used as sunscreen.

A facile method for fabrication of titanium-doped hybrid materials with high refractive index

RSC Advances ◽  
2014 ◽  
Vol 4 (27) ◽  
pp. 13909-13918 ◽  
Author(s):  
Xibing Zhan ◽  
Qingyu Xing ◽  
Huijuan Liu ◽  
Junying Zhang ◽  
Jue Cheng ◽  
...  
Keyword(s):  
Refractive Index ◽  
Hybrid Materials ◽  
Sol Gel ◽  
High Refractive Index ◽  
Sol Gel Process ◽  
Facile Route

This paper presents a facile route to prepare a series of high refractive index and homogeneous hybrid resins with titanium in the backbone by a non-hydrolytic sol–gel process.

Preparation and Characterization of Organic-Inorganic Nanocomposite Films for Holographic Recording

2005 ◽  
Vol 277-279 ◽  
pp. 1039-1043 ◽  
Author(s):  
Ji Young Park ◽  
Eunkyoung Kim
Keyword(s):  
Visible Light ◽  
Diffraction Efficiency ◽  
Sol Gel ◽  
High Refractive Index ◽  
Nanocomposite Films ◽  
Holographic Recording ◽  
Hybrid Solutions ◽  
Sol Gel Process ◽  
High Diffraction

The photopolymerization of aromatic methacrylate in organic-inorganic nanocomposite films for holographic recording media was investigated. Thick photopolymer films (thickness>200 µm) were prepared using organic-inorganic hybrid solutions containing high refractive index monomers, through the sol-gel process. These photopolymer films were polymerized upon exposure to a visible light with high photo conversions. The photopolymerization was highly effective under visible light irradiation and could be applied to a holographic medium with high diffraction efficiency (>95 %) by using a 532nm laser. The diffraction efficiency of the film was much affected by morphology, which might affect monomer diffusion during the recording.

scholarly journals Epitaxial Growth of Yb2O3 Buffer Layers on Biaxially Textured-Ni (100) Substrates by Sol-Gel Process

1999 ◽  
Vol 574 ◽  
Author(s):  
T. G. Chirayil ◽  
M. Paranthaman ◽  
D. B. Beach ◽  
J. S. Morrelli ◽  
E. Y. Sun ◽  
...  
Keyword(s):  
Sol Gel ◽  
Precursor Solution ◽  
Amorphous Film ◽  
Dip Coating ◽  
Coated Conductors ◽  
Buffer Layers ◽  
Axis Orientation ◽  
Sol Gel Process ◽  
Out Of Plane ◽  
Coating Methods

AbstractIn order to develop an alternative buffer layer architecture using the sol-gel process to produce YBCO (YBa2Cu3O7-δ) coated conductors, Yb2O3 has been chosen as the candidate material. Buffer layers of Yb2O3 were epitaxially grown on biaxially textured-Ni (100) substrates by the sol gel process for the first time. The Yb2O3 precursor solution was prepared from an alkoxide sol-gel route in 2-methoxyethanol and was deposited on textured-Ni (100) substrates by either spin coating or dip coating methods. The amorphous film was then processed at 1160°C under flowing (96%)Ar/H2(4%) gas mixture for one hour. The Yb2O3 film exhibited a strong c-axis orientation on the Ni (100) substrates. The phi and omega scans indicated good in plane and out of plane orientations. The X-ray (222) pole figure showed a cube-on-cube epitaxy. High current YBCO films were grown on the Yb2O3 sol-gel buffered-Ni substrates.

Anti-reflection and anti-static (AR/AS) coatings made by TiO2 sol-gel process with poly(3,4-ethylenedioxy thiophene)

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Won Jung Kim ◽  
Tae Young Kim ◽  
Chin Su Park ◽  
Jong Eun Kim ◽  
Tae Hee Lee ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
Nir Spectroscopy ◽  
High Refractive Index ◽  
Conducting Layer ◽  
Uv Curable ◽  
Sol Gel Process ◽  
Refractive Index Layer ◽  
Poly Ethylene ◽  
Low Refractive Index

AbstractIn this study, we designed a two-layer hybrid Anti-Reflection/Anti-Static (AR/AS) thin film. Two kinds of UV-curable fluorinated compounds were synthesized as low refractive index materials, and a TiO2 sol combined with a conducting polymer, poly(3,4-ethylenedioxythiophene) was made by the sol-gel process for use as a high refractive index material as well as a conducting layer. In order to determine the most optimized AR/AS system, the spectral properties were simulated with the refractive index of each layer. According to the simulated results, a high refractive index layer was deposited on the hard coated poly(ethylene terephthalate) (PET) substrate by the spin coating technique, and a low refractive index layer was spin coated on the low refractive index layer. The reflectance and transmittance were measured by UV-VIS-NIR spectroscopy. It was found that the measured reflectance and the maximum transmittance of the AR/AS film were 0.71 %R at a wavelength of 550 nm and 93 %T in the wavelength range between 400 and 700 nm, respectively. The surface resistance of the AR/AS film was 108.6 ohms.

Tailored Molecular Precursors of Yttrium Oxide Using Functional Alcohols and Acetylacetone as Modifiers

1990 ◽  
Vol 180 ◽  
Author(s):  
Liliane G. Hubert-Pfalzgraf ◽  
Olivier Poncelet ◽  
Jean-Claude Daran
Keyword(s):  
Sol Gel ◽  
Advanced Materials ◽  
X Ray Diffraction ◽  
X Ray ◽  
Molecular Precursors ◽  
Process Comparison ◽  
Bridging Ligand ◽  
Sol Gel Process ◽  
Hydrolysis Of ◽  
Insight Into

ABSTRACTYttrium is involved as oxide in a variety of advanced materials. Hydrolysis of its most common alkoxide, yttrium oxoisopropoxide Y5O(OiPr)13 , is difficult to control as a result of the high electropositivity of the metal. Functional alcohols such as 2-methoxyethanol and acetylacetone have thus been used as modifiers. These tailored precursors have been fully characterized (single crystal X-Ray diffraction, IR, NMR. ). The tendency of methoxyethanol to act as a bridging ligand and to stabilize high oligomers - Y(OC2H4OMe)3 is a decamer - gives some insight into its behavior as “network builder”. The unexpected cleavage of acetylacetone offers a route to an interesting acetatoacetylacetonate derivative, Y2(OAc)2(acac)4(H2O)2 , but also suggest that this classical “modifier” could be affected by the hydrolysis-polycondensation reactions of the metallic species during the sol-gel process. Comparison of the hydrolysis behavior of the different precursors was performed.

Insight into the mechanism of boron-doping of carbon aerogel for enhancing the activity of low-temperature selective catalytic reduction of NO with NH3

2021 ◽  
Author(s):  
Minghe Yang ◽  
He Wang ◽  
Shuangling Jin ◽  
Rui Zhang ◽  
Yan Wang ◽  
...  
Keyword(s):  
Catalytic Reduction ◽  
Phenylboronic Acid ◽  
Sol Gel ◽  
Boron Doping ◽  
Carbon Aerogel ◽  
Resorcinol Formaldehyde ◽  
Sol Gel Process ◽  
Organic Gel ◽  
Insight Into

Boron-doping of carbon aerogel (BCA) was enabled by incorporating phenylboronic acid in the sol-gel process into the organic gel from resorcinol-formaldehyde and the role of boron-doping on the catalytic activity...

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