Multi-Functional Luminescent Coating for Wood Fabric Based on Silica Sol-Gel Approach

Environmentally friendly protection coatings have obtained increasing attention for their use in wooden materials, which can be destroyed easily when exposed to outdoor environments. A series of silane sol coatings coordinated with Eu3+ was prepared by hydrolyzing silane compounds. The obtained luminescent coating with three-dimensional net structure showed excellent optical, anti-ultraviolet aging, and thermal stability. The hybrid silane-modified compound coating was well-distributed on the wood by Si–O bonds to prevent its removal. The compound coating could stave off the decomposition of wood by converting ultraviolet light into red light and a charring action can endow the wood with thermal stability at high temperature, demonstrating the improvement of fire resistance and radiation residence following prolonged exposure to ultraviolet light, proving its excellent anti-ultraviolet aging properties.

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Synthesis and photocatalytic properties of Sn–TiO2 nanomaterials

Journal of Advanced Dielectrics ◽

10.1142/s2010135x20600188 ◽

2020 ◽

Vol 10 (01n02) ◽

pp. 2060018

Author(s):

E. M. Bayan ◽

T. G. Lupeiko ◽

L. E. Pustovaya ◽

M. G. Volkova

Keyword(s):

Phase Transition ◽

Thermal Stability ◽

Sol Gel ◽

Rutile Phase ◽

Photocatalytic Properties ◽

Light Activation ◽

X Ray ◽

Tio2 Nanomaterials ◽

Visible Light Activation ◽

Thermal Stability Of

Sn-doped TiO2 nanomaterials were synthesized by sol–gel method. It was shown the phase compositions and phase transitions change with the introduction of different tin amounts (0.5–20[Formula: see text]mol.%). X-ray powder diffraction was used to study the effect of different tin amounts on the anatase–rutile phase transition. It was found that the introduction of ions increases the thermal stability of anatase modifications. The material’s photocatalytic activity was studied in reaction with a model pollutant (methylene blue) photodegradation under UV and visible light activation. The best photocatalytic properties were shown for material, which contains 5[Formula: see text]mol.% of Sn.

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Construction of the Cellulose Nanofibers (CNFs) Aerogel Loading TiO2 NPs and Its Application in Disposal of Organic Pollutants

Polymers ◽

10.3390/polym13111841 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1841

Author(s):

Kang Li ◽

Xuejie Zhang ◽

Yan Qin ◽

Ying Li

Keyword(s):

High Efficiency ◽

Sol Gel ◽

Cellulose Nanofibers ◽

Three Dimensional ◽

Good Mechanical Property ◽

Polar Groups ◽

Dimensional Network ◽

Natural Polysaccharide ◽

Valuable Method ◽

Adsorption Capability

Aerogels have been widely used in the adsorption of pollutants because of their large specific surface area. As an environmentally friendly natural polysaccharide, cellulose is a good candidate for the preparation of aerogels due to its wide sources and abundant polar groups. In this paper, an approach to construct cellulose nanofibers aerogels with both the good mechanical property and the high pollutants adsorption capability through chemical crosslinking was explored. On this basis, TiO2 nanoparticles were loaded on the aerogel through the sol-gel method followed by the hydrothermal method, thereby the enriched pollutants in the aerogel could be degraded synchronously. The chemical cross-linker not only helps build the three-dimensional network structure of aerogels, but also provides loading sites for TiO2. The degradation efficiency of pollutants by the TiO2@CNF Aerogel can reach more than 90% after 4 h, and the efficiency is still more than 70% after five cycles. The prepared TiO2@CNF Aerogels have high potential in the field of environmental management, because of the high efficiency of treating organic pollutes and the sustainability of the materials. The work also provides a choice for the functional utilization of cellulose, offering a valuable method to utilize the large amount of cellulose in nature.

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Construction of a Three-Dimensional BaTiO3 Network for Enhanced Permittivity and Energy Storage of PVDF Composites

Materials ◽

10.3390/ma14133585 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3585

Author(s):

Xueqing Bi ◽

Lujia Yang ◽

Zhen Wang ◽

Yanhu Zhan ◽

Shuangshuang Wang ◽

...

Keyword(s):

Energy Storage ◽

Polyvinylidene Fluoride ◽

Dielectric Breakdown ◽

Breakdown Strength ◽

Sol Gel ◽

Three Dimensional ◽

Low Dielectric ◽

Energy Storage Properties ◽

Discharge Energy Density ◽

Pure Pvdf

Three-dimensional BaTiO3 (3D BT)/polyvinylidene fluoride (PVDF) composite dielectrics were fabricated by inversely introducing PVDF solution into a continuous 3D BT network, which was simply constructed via the sol-gel method using a cleanroom wiper as a template. The effect of the 3D BT microstructure and content on the dielectric and energy storage properties of the composites were explored. The results showed that 3D BT with a well-connected continuous network and moderate grain sizes could be easily obtained by calcining a barium source containing a wiper template at 1100 °C for 3 h. The as-fabricated 3D BT/PVDF composites with 21.1 wt% content of 3D BT (3DBT–2) exhibited the best comprehensive dielectric and energy storage performances. An enhanced dielectric constant of 25.3 at 100 Hz, which was 2.8 times higher than that of pure PVDF and 1.4 times superior to the conventional nano–BT/PVDF 25 wt% system, was achieved in addition with a low dielectric loss of 0.057 and a moderate dielectric breakdown strength of 73.8 kV·mm−1. In addition, the composite of 3DBT–2 exhibited the highest discharge energy density of 1.6 × 10−3 J·cm−3 under 3 kV·mm−1, which was nearly 4.5 times higher than that of neat PVDF.

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The influence of red and blue light on the rate of photosynthesis and the CO2 compensation point at various oxygen concentrations

Canadian Journal of Botany ◽

10.1139/b70-186 ◽

1970 ◽

Vol 48 (6) ◽

pp. 1251-1257 ◽

Cited By ~ 11

Author(s):

N. P. Voskresenskaya ◽

G. S. Grishina ◽

S. N. Chmora ◽

N. M. Poyarkova

Keyword(s):

Nicotiana Tabacum ◽

Blue Light ◽

Photosynthetic Rate ◽

Prolonged Exposure ◽

Red Light ◽

Compensation Point ◽

Gas Analyzer ◽

Co2 Compensation Point ◽

Rate Of Photosynthesis ◽

Light Inhibition

Apparent photosynthesis of attached leaves of Phaseolus vulgaris, Vicia faba, Pisum sativum, and Nicotiana tabacum at various intensities of blue and red light was measured by infrared CO2 gas analyzer in a closed system. Simultaneously the CO2 compensation point was measured.It was found that light-limited photosynthetic rate in blue light was equal to or more than that in red light. Inhibition of photosynthesis, which sometimes occurred at light-saturated intensities of blue light, could be avoided by addition of red light, prolonged exposure of the plants to blue light, or by lowering the O2 concentration. Accordingly, the increase of photosynthetic rate due to change of O2 concentration from 21 to 3% O2 is higher in blue light only when photosynthesis is inhibited by blue light at 21% O2. The data on the action of blue and red light on the CO2 compensation point seems to exclude the activation of photorespiration by blue light.The possible effects of blue light on apparent photosynthesis are discussed on the basis of the results presented.

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Preparation of Porous Organically-Modified Silicate Hybrids for Cell Culture Matrix

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.330-332.1177 ◽

2007 ◽

Vol 330-332 ◽

pp. 1177-1180 ◽

Cited By ~ 3

Author(s):

Kanji Tsuru ◽

Satoshi Hayakawa ◽

Yuki Shirosaki ◽

T. Okayama ◽

K. Kataoka ◽

...

Keyword(s):

Cell Culture ◽

Mammalian Cells ◽

Pore Diameter ◽

Sol Gel ◽

Three Dimensional ◽

Culture Methods ◽

Organically Modified ◽

Dimensional Cell

Porous & rubbery organic-inorganic hybrids were synthesized from tetraethoxysilane (TEOS) and polydimethylsiloxane (PDMS) through a sol-gel route using sieved sucrose granules as a porogen. The porous hybrids with a high content of PDMS behaved like polymer sponge. The porosity was over 90% irrespective of the hybrid composition and the pore diameter ranged from 100 to 500 μm. In the three-dimensional cell culture, mammalian cells were well cultured in the porous hybrids. The present results indicate that the hybrids may be a promising scaffold for developing such functional culture methods.

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A bioprinted composite hydrogel with controlled shear stress on cells

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1177/0954411920976682 ◽

2020 ◽

pp. 095441192097668

Author(s):

Amirhossein Bakhtiiari ◽

Rezvan Khorshidi ◽

Fatemeh Yazdian ◽

Hamid Rashedi ◽

Meisam Omidi

Keyword(s):

Shear Stress ◽

Cell Viability ◽

Room Temperature ◽

Degradation Rate ◽

Diffusion Rate ◽

Sol Gel ◽

Three Dimensional ◽

Simulation Software ◽

Sol Gel Transition ◽

Gel Transition

In recent decades, three dimensional (3D) bio-printing technology has found widespread use in tissue engineering applications. The aim of this study is to scrutinize different parameters of the bioprinter – with the help of simulation software – to print a hydrogel so much so that avoid high amounts of shear stress which is detrimental for cell viability and cell proliferation. Rheology analysis was done on several hydrogels composed of different percentages of components: alginate, collagen, and gelatin. The results have led to the combination of percentages collagen:alginate:gelatin (1:4:8)% as the best condition which makes sol-gel transition at room temperature possible. The results have shown the highest diffusion rate and cell viability for the cross-linked sample with 1.5% CaCl2 for the duration of 1 h. Finally, we have succeeded in printing the hydrogel that is mechanically strong with suitable degradation rate and cell viability.

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Cobalt-Doped Silica Organic-Inorganic Materials by Sol-Gel Method: Preparation and Thermal Stability Calcined under N2 Atmosphere

Integrated Ferroelectrics ◽

10.1080/10584587.2021.1911372 ◽

2021 ◽

Vol 219 (1) ◽

pp. 247-259

Author(s):

Jing Yang ◽

Yuzhi Ai ◽

Wangqing Fan ◽

Ruihua Mu ◽

Xi Chen ◽

...

Keyword(s):

Thermal Stability ◽

Sol Gel ◽

Inorganic Materials ◽

Gel Method ◽

Sol Gel Method ◽

N2 Atmosphere

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Eu3+/Tb3+ Co-Doped Cerium Oxide Transparent Nanocomposite for Color-Tunable Emission

NANO ◽

10.1142/s1793292018501199 ◽

2018 ◽

Vol 13 (10) ◽

pp. 1850119

Author(s):

Xiaoyan Li ◽

Yunlong Yu ◽

Xiangfeng Guan ◽

Peihui Luo ◽

Linqin Jiang ◽

...

Keyword(s):

Electron Microscopy ◽

Thermal Stability ◽

Transmission Electron Microscopy ◽

Sol Gel ◽

Homogeneous Precipitation ◽

Transmission Electron ◽

Color Tunable ◽

Co Doped ◽

Tunable Emission

Eu[Formula: see text]/Tb[Formula: see text] co-doped nanocomposite containing CeO2 nanocrystals was successfully prepared by an in situ sol–gel polymerization approach. High-resolution transmission electron microscopy demonstrated the homogeneous precipitation of CeO2 nanocrystals among the polymethylmethacrylate (PMMA) matrix. The thermal stability and UV-shielding capability of the obtained nanocomposite were improved with increase of CeO2 content. The tuning of the emissive color from green and yellow to red can be easily achieved by varying the dopant species and concentration. These results suggested that the obtained nanocomposite could be potentially applicable in transparent solid-state luminescent devices.

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A Novel (3,4,9)-Connected 3D Metal–Organic Framework Based on the Non-Planar Tricarboxyl Tecton and Zn5O4-Cluster SBU

Australian Journal of Chemistry ◽

10.1071/ch14392 ◽

2015 ◽

Vol 68 (1) ◽

pp. 161 ◽

Cited By ~ 2

Author(s):

Zhuo-Wei Wang ◽

Hui Zhao ◽

Min Chen ◽

Min Hu

Keyword(s):

Thermal Stability ◽

Benzoic Acid ◽

Metal Organic Framework ◽

Three Dimensional ◽

Crystalline Material ◽

Tripodal Ligand ◽

Secondary Building Units ◽

Metal Organic ◽

Organic Framework

Combination of a non-planar tripodal ligand 3,4-bi(4-carboxyphenyl)-benzoic acid (H3L) and Zn5O4-cluster secondary building units affords a highly connected three-dimensional metal–organic framework, {[Zn5(μ3-OH)3(μ2-OH)L2(H2O)2](H2O)2}n (1), which exhibits an unusual (3,4,9)-connected (42.5)(3.43.52)(32.45.511.613.73.82) topological net. The thermal stability and solid luminescence of the crystalline material have also been investigated.

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