Chiral separations with crosslinked cellulose derivatives attached onto hybrid silica monolith particles via the thiol–ene click reaction

A hybrid silica monolith containing vinyl groups was synthesized by a sol–gel method, and then ground and treated, yielding silica particles with a 3–5 μm particle size and a 10–20 nm pore size.

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Li Conductivity of Nanocrystalline Li4Ti5O12 Prepared by a Sol-Gel Method and High-Energy Ball Milling

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.289-292.565 ◽

2009 ◽

Vol 289-292 ◽

pp. 565-570 ◽

Cited By ~ 11

Author(s):

W. Iwaniak ◽

J. Fritzsche ◽

M. Zukalová ◽

R. Winter ◽

Martin Wilkening ◽

...

Keyword(s):

Particle Size ◽

Crystallite Size ◽

Sol Gel ◽

High Energy ◽

Average Particle ◽

Li Ion Batteries ◽

Gel Method ◽

Sol Gel Method ◽

Li Ion ◽

20 Nm

Spinel-type structured Li4+xTi5O12 (0 6 x 6 3 ) is actually one of the most promising anode materials for Li ion batteries. In its nanostructured form it is already used in some commercially available Li ion batteries. As was recently shown by our group (Wilkening et al., Phys. Chem. Chem. Phys. 9 (2007) 1239), Li diffusivity in microcrystalline Li4+xTi5O12 with x = 0 is rather slow. In the present contribution the Li conductivity in nanocrystalline samples of the electronic insulator Li4Ti5O12 prepared by different routes is investigated using impedance spectroscopy. The mean crystallite size of the samples is about 20 nm. The ionic conductivity of nanocrystalline Li4Ti5O12 obtained by mechanical treatment is higher by about two orders of magnitude compared to that found for a material which was prepared following a sol-gel method. The latter resembles the behaviour of the microcrystalline sample with an average particle size in the μm range rather than that of a nanocrystalline ball milled one with a mean crystallite size of about than 20 nm. The larger conductivity of the ball milled sample is ascribed to a much higher defect density generated when the particle size is reduced mechanically.

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Synthesis and Characterization of TiO2 Nanoparticle Using Starch as a Template by Sol-Gel Method for the Application of UV Protection

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.789.237 ◽

2013 ◽

Vol 789 ◽

pp. 237-241 ◽

Cited By ~ 1

Author(s):

Maya Komalasari ◽

Bambang Sunendar

Keyword(s):

Aqueous Solution ◽

Particle Size ◽

Pore Size ◽

Surface Area ◽

Sol Gel ◽

Uv Protection ◽

Advanced Technology ◽

Narrow Particle Size Distribution ◽

Gel Method ◽

Sol Gel Method

Nanotechnology is one of the key technology had been developed since in all fields including textile industries for medical, hygienic, and technical textiles. Particle size with nanohad been indicated in particular for the application of controlled release material for functional textiles. TiO2nanopowder has remarkable photo-catalytic and semiconductor as material for various advanced technology fields of application such as UV Protection. In this research the synthesis of TiO2nanoparticle and characterization had been conducted successfully by sol-gel method. The starch was used as a template to get nanoparticles structure. TiO2sol with narrow particle size distribution using TiCl4as the starting material. The sol was prepared by a process where HCl was added to a gel of hydrated titanium oxide to dissolve it. The effect of preparation parameters were investigated, by deionized water : HCl 1 M was slowly added to TiCl4at 5 °C. In this study the production of anatase or rutile TiO2nanostructured powder by forced hydrolysis of aqueous Ti (IV) chloride solution and concentration from 0,3, 0,5 then 1 M. TiO2sphere were fabricated by a facile and low cost stable starch assisted by sol-gel method. Aqueous solution of starch was added and then heated in temperature 80°C and aqueous solution of ammonium hydroxide was added to adjust pH to 8. After aging period of time, the white precipitate was filtered and then calcined in temperature 5000C. The as-obtained samples were characterize,kjnhjd by SEM (Scanning Electron Microscope), UV-vis diffuse reflectance spectroscopy, X-Ray Diffraction (XRD) and Brunauer Emmett Teller (BET) analysis. The particle size is less than 100 nm and if it uses template particle TiO2more uniform distribution and spherical shape with particle size 170 200 nm. Crystalinity particle is 4 19 nm and the phase structure of anatase and rutile. The energy band gap semiconductor TiO2synthesis is 3.1 to 3.7 eV. Surface area without template starch 40.655 m2/g, with total for volume 0.278 cm3/g and pore size of 27 nm, and used template starch surface area 35.488m2/g with total for volume 0.196 cm3/g and pore size of 22 nm. Based on this research, the best a crystal phase for UV protection application is rutile phase.

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Novel functional hybrid silica sol–gel coating for copper protection via in situ thiol–ene click reaction

RSC Advances ◽

10.1039/c4ra00142g ◽

2014 ◽

Vol 4 (30) ◽

pp. 15776-15781 ◽

Cited By ~ 11

Author(s):

Shusen Peng ◽

Zhixiang Zeng ◽

Wenjie Zhao ◽

He Li ◽

Jianmin Chen ◽

...

Keyword(s):

Click Reaction ◽

Sol Gel ◽

Silica Sol ◽

Gel Method ◽

Sol Gel Method ◽

Anticorrosion Coating ◽

Hybrid Silica

A novel anticorrosion coating, which crosslinks with inorganic bonds (Si–O–Si) and organic bonds (C–S–C), is formed on copper through an in situ sol–gel method and thiol–ene click reaction.

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Annealing Effects on the Physical and Magnetic Properties of Tb1.5Y1.5Fe5O12 Films Nanoparticles Prepared by Sol-Gel Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.756.91 ◽

2013 ◽

Vol 756 ◽

pp. 91-98 ◽

Cited By ~ 2

Author(s):

Ftema W. Aldbea ◽

Noor Bahyah Ibrahim ◽

Mustafa Hj. Abdullah

Keyword(s):

Particle Size ◽

Magnetic Properties ◽

Annealing Temperature ◽

Quartz Substrate ◽

Sol Gel ◽

Lattice Parameter ◽

Gel Method ◽

X Ray ◽

Sol Gel Method ◽

Iron Garnet

Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900 °C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900°C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-raySpectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealingtemperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. Normal 0 21 false false false MS X-NONE X-NONE MicrosoftInternetExplorer4 Terbium –substituted yttrium iron garnet (Tb1.5Y1.5Fe5O12) films nanoparticles were successfully prepared by a sol-gel method. The films were deposited on the quartz substrate using spin coating technique. To study effect of annealing temperature, the annealing process was executed at 700, 800 and 900°C in air for 2 hours. The X-ray diffraction (XRD) proved that the pure phase of garnet structure was detected for the film annealed at 900 °C. The lattice parameter increased with the increment of annealing temperature and the highest value of 12.35 Å was obtained at 900 °C. Field Emission Scanning Electron Microscope (FE-SEM) results showed that the particle size increased from 43nm to 56nm as annealing temperature increased from 700 to 900 °C. The film’s thickness also affected by increasing of annealing temperature and become thin at 900 °C due to densification process occurred at high annealing temperature. The elemental compositions of the Tb1.5Y1.5Fe5O12 film were detected using an Energy Dispersive X-ray Spectroscopy (EDX). Magnetic properties at room temperature were measured using a Vibrating Sample Magnetometer (VSM).The saturation magnetization Ms increased with the annealing temperature and showed a high value of 104emu/cm3, but the coercivity Hc of the film was decreased due to the increment of the particle size. st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;}

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Synthesis of Spherical Silica by Sol-Gel Method and Its Application as Catalyst Support

ASEAN Journal of Chemical Engineering ◽

10.22146/ajche.50086 ◽

2011 ◽

Vol 10 (2) ◽

pp. 25

Author(s):

Anirut Leksomboon ◽

Bunjerd Jongsomjit

Keyword(s):

Particle Size ◽

Ethylene Glycol ◽

Specific Surface ◽

Surface Area ◽

Specific Surface Area ◽

Sol Gel ◽

Weight Ratio ◽

Gel Method ◽

Sol Gel Method ◽

Spherical Silica

In this present study, the spherical silica support was synthesized from tetraethyloxysilane (TEOS), water, sodium hydroxide, ethylene glycol and n-dodecyltrimethyl ammonium bromide (C12TMABr). The particle size was controlled by variation of the ethylene glycol co-solvent weight ratio of a sol-gel method preparation in the range of 0.10 to 0.50. In addition, the particle size apparently increases with high weight ratio of co-solvent, but the particle size distribution was broader. The standard deviation of particle diameter is large when the co-solvent weight ratio is more than 0.35 and less than 0.15. However, the specific surface area was similar for all weight ratios ranging from 1000 to 1300 m2/g. The synthesized silica was spherical and has high specific surface area. The cobalt was impregnated onto the obtained silica to produce the cobalt catalyst used for CO2 hydrogenation.</

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Preparation of La0.75Sr0.25Cr0.5Mn0.5O3-δ Nanometer Powders by Sol-Gel Method and Research about its Electrochemical Performance

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.257 ◽

2013 ◽

Vol 712-715 ◽

pp. 257-261

Author(s):

Yin Lin Wu ◽

Qing Hui Wang ◽

Ling Wang ◽

Hai Yan Zhao

Keyword(s):

Heat Treatment ◽

Particle Size ◽

Electrochemical Performance ◽

Heat Treatment Temperature ◽

Sol Gel ◽

Treatment Temperature ◽

Preparation Process ◽

Gel Method ◽

Sol Gel Method ◽

Ft Ir

The La0.75Sr0.25Cr0.5Mn0.5O3-δnanometer powders were prepared by citric acid sol-gel method.The samples were characterized by DTA, FT-IR, XRD, TEM techniques. The preparation process, morphology of synthesized powders, the best heat-treatment temperature and the electrochemical performance had been studied. The results show that the spherical nanometer powders can be obtained and the best heat-treatment temperature is 800°C. The particle size is about 30nm and Ea is 0.071 eV.

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The Influence of Water Content on the Growth of the Hybrid-Silica Particles by Sol-Gel Method

Silicon ◽

10.1007/s12633-020-00756-z ◽

2020 ◽

Author(s):

Xijia Zhao ◽

Yihan Wang ◽

Jianhui Luo ◽

Pingmei Wang ◽

Peiwen Xiao ◽

...

Keyword(s):

Water Content ◽

Sol Gel ◽

Silica Particles ◽

Gel Method ◽

Sol Gel Method ◽

Hybrid Silica ◽

Influence Of Water

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Controlled synthesis and enhanced photoelectro-catalytic activity of a 3D TiO2 nanotube array/TiO2 nanoparticle heterojunction using a combined dielectrophoresis/sol–gel method

Journal of Materials Chemistry C ◽

10.1039/c9tc00568d ◽

2019 ◽

Vol 7 (17) ◽

pp. 4981-4987 ◽

Cited By ~ 6

Author(s):

Ruiyu Bao ◽

Chen Chen ◽

Jianxin Xia ◽

Huiying Chen ◽

Hua Li

Keyword(s):

Particle Size ◽

Catalytic Activity ◽

Surface Morphology ◽

Sol Gel ◽

Tio2 Nanoparticle ◽

Controlled Synthesis ◽

Tio2 Nanotube Array ◽

Nanotube Array ◽

Gel Method ◽

Sol Gel Method

The surface morphology and particle size of materials can be controlled using DEP technology.

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Study on the Synthesis of Batches of the System Y-Ba-Cu-O Using Sol-Gel Method

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.91.19 ◽

2014 ◽

Vol 91 ◽

pp. 19-23

Author(s):

Plamen Pashev ◽

Rositsa Raykova ◽

Yancho Hristov ◽

Bogdan Bogdanov

Keyword(s):

Particle Size ◽

Citric Acid ◽

Sol Gel ◽

Gel Method ◽

Sol Gel Method ◽

Blue Solution ◽

Transformation Processes ◽

Nitrate Solutions ◽

Thermally Treated

The study presented deal with preparation of batches of the system Y-Ba-Cu-O using sol-gel method and citric acid as precursor. Batches with particle size of 100 nm containing each of the phases Y123 and Y211 were prepared. The stoichiometric amounts of Y, Ba and Cu oxides were dissolved in 65% HNO3 until clear blue solution was observed under heating to 80 ̊С. The nitrate solutions obtained were neutralized to pH = 6 with 25% solution of NH3 (p.a.), then С6Н8О7 was added as the gels obtained were thermally treated. The transformation processes taking place under change of temperature were studied by IR, XRD, DTA and SEM.

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