Electrophoretic Self-Assembly of Sol-Gel Derived Silica Microspheres

2007 ◽  
Vol 124-126 ◽  
pp. 599-602 ◽  
Author(s):  
Rong Fuh Louh ◽  
Eric Huang
Keyword(s):  
Photonic Crystals ◽  
Self Assembly ◽  
Sol Gel ◽  
Tetraethyl Orthosilicate ◽  
Silica Microspheres ◽  
Sol Gel Process ◽  
Layered Pattern ◽  
Fcc Structure

Monosized silica microspheres (100−500 nm) were prepared by a sol-gel process by using tetraethyl orthosilicate precursor. A well-dispersed suspension was obtained by adjusting suspension to be weakly basic for a better yield of electrophoretic self-assembly (EPSA). A perfect EPSA behavior of silica microspheres into the layered pattern with the FCC structure was created. EPSA technique has been demonstrated as a simple and effective route to make numerous templates, which are associated with 3-D structures of silica microspheres in asymmetric geometries, for design of photonic crystals.

Monitoring the Tetraethyl Orthosilicate (TEOS)-Based Sol–Gel Process with Cu(II) Ions as a Spin Probe

2015 ◽  
Vol 47 (1) ◽  
pp. 1-12 ◽  
Author(s):  
M. Mazúr ◽  
L. Husáriková ◽  
M. Valko ◽  
C. J. Rhodes
Keyword(s):  
Spin Probe ◽  
Sol Gel ◽  
Tetraethyl Orthosilicate ◽  
Sol Gel Process

Preparation of Porous Silica by Microemulsion Coupling with Sol-Gel Method

2010 ◽  
Vol 113-116 ◽  
pp. 2266-2270
Author(s):  
Jing Li ◽  
Wei Xue ◽  
Yong Zhao ◽  
Zhi Miao Wang
Keyword(s):  
Sol Gel ◽  
Porous Silica ◽  
Tetraethyl Orthosilicate ◽  
Large Specific Surface Area ◽  
Silicon Source ◽  
Effect Of Solvent ◽  
Texture Properties ◽  
Sol Gel Process ◽  
Novel Method ◽  
Hcl Concentration

A novel method of microemulsion coupling with sol–gel process was used for preparation of porous silica using tetraethyl orthosilicate as silicon source. Effect of solvent and catalyst on the surface texture properties was investigated respectively. The results showed that porous silica with large specific surface area (738.65 m2/g) and high pore volume (2.01 cm3/g) was obtained. However, the mesopores in silica were arranged in disorder and showed great ununiformity in shape and arrangement. To obtain porous silica with desired texture properties, an appropriate dosage of ethanol and higher HCl concentration were needed.

scholarly journals Interlayer-free Glucose Carbonised Template Silica Membranes for Brine Water Desalination

2019 ◽  
Vol 280 ◽  
pp. 03010 ◽  
Author(s):  
Dwi Rasy Mujiyanti ◽  
Muthia Elma ◽  
Mufidah Amalia
Keyword(s):  
Sol Gel ◽  
Tetraethyl Orthosilicate ◽  
Water Desalination ◽  
Molar Ratio ◽  
Solution Temperature ◽  
Nacl Solution ◽  
Silica Membranes ◽  
Salt Ions ◽  
Sol Gel Process ◽  
Free Glucose

Interlayer-free glucose carbonized template silica membranesbased on tetraethyl orthosilicate (TEOS) and glucose were successfullyprepared using an acid-base catalysed sol-gel method for artificial brinewater desalination (7.5% wt NaCl solution %) at temperatures range from25, 40 and 60 °C. These membranes calcined at 250 and 400 °C. Themembranes were fabricated through sol-gel process by using TEOS(tetraethyl orthosilicate); ethanol; nitric acid; ammonia; aquadest andglucose as a template. By molar ratio is 1: 38: 0.0007: 0.0003: 5 and0.25%; 0.5%, 1% w/v glucose as template. The results show the highestwater fluxes of 1.8, 2.2 and 4.8 kg m−2 h−1 for 25, 40 and 60 °Cdesalination process with excellent salt rejections of 99.5, 99.5 and 99.7%, respectively. It was found that the higher the NaCl solution temperature asfeed solution as well as glucose concentration (0.25% to 1% wt) astemplate attached in the silica matrixes, the higher water fluxes eventhough the salt rejection remain the same. This study demonstrates that theorganosilica membranes offered the carbonized silica mesostructuremembranes with excellent separation of water from the hydrated salt ions, particularly for processing brine salt solutions.

scholarly journals Embedded polyhedral SiO2/castor oil-based WPU shell-core hybrid coating via self-assembly sol-gel process

2020 ◽  
Vol 141 ◽  
pp. 105540
Author(s):  
Linlong Meng ◽  
Haoxin Zhu ◽  
Bing Feng ◽  
Zhenhua Gao ◽  
Di Wang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Castor Oil ◽  
Sol Gel ◽  
Hybrid Coating ◽  
Sol Gel Process

Research of Aluminum Sheet Encapsulated by Organic Silane Acrylate Resin and Tetraethyl Orthosilicate

2011 ◽  
Vol 399-401 ◽  
pp. 390-393
Author(s):  
Ai Huan Gao ◽  
Pi Hui Pi ◽  
Jiang Cheng ◽  
Zhuo Ru Yang
Keyword(s):  
Hybrid Film ◽  
Condensation Reaction ◽  
Sol Gel ◽  
Tetraethyl Orthosilicate ◽  
Aluminum Sheet ◽  
Aluminum Surface ◽  
Hydroxyl Groups ◽  
Organic Hybrid ◽  
Sol Gel Process ◽  
Acrylate Resin

Aluminum sheet was encapsulated by inorganic-organic hybrid film through a base catalyzed sol-gel method using organic acrylate silane resin PMBV and TEOS as precursors. FTIR and AFM characterizations prove that PMBV and TEOS have hydrolyzed and co-condensed with each other in the sol-gel process to form an uniform film on the surface of aluminum sheet. XPS result shows hydroxyl groups on aluminum surface have taken part in the co-condensation reaction.

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