Samples containing 0.5, 1, 2 and 4 wt% of β-silicon carbide nanowhiskers and nanoparticles in epoxy resin were prepared using a high-intensity ultrasonic liquid processor and casting technique. Mechanical and physical tests such as tensile, flexural, hardness, and wear along with a morphological investigation by FT-IR, scanning electron microscopy and transition electron microscopy were
A new aerogel based CO2 adsorbent developed using a simple sol–gel method along with supercritical drying. Chemical Communiions, 2014, 50(81):12158-12161. (8) Yong Kong, et al. Preparation of monolith SiC aerogel with high surface area and large pore …
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This has been attributed to gel glasses exhibiting a mesoporous texture (pores in the range of 2 - 50 nm in diameter), which is inherent to the sol-gel process and increases the specific surface area thus [1, 3, 8-12]. An ideal scaffold should coine the beneficial properties of
Boron carbide powder was synthesized by sol-gel polycondensation of boric acid with citric acid. The starting materials of Serbian origin were dissolved in water and mixed homogeneously until a precomposite gel was formed, which was converted into cryogels after
Hydroxyapatite, Ca 10 (PO 4) 6 (OH) 2, was synthesized using a sol-gel method. When sufficient amount of citric acid or sodium citrate was added to the precursor salts, a translucent suspension was formed, in contrast to the opaque suspension obtained without the citrate addition.
Although sol–gel bioactive glasses have a better composition range and bioactivity than melt bioactive glasses, mesoporous channel (2–20 nm), high surface area and pore volume nanosize particles, high surface area limitations limited pore size (<20 nm)
Improvement of high-temperature oxidation resistance of titanium-based alloy by sol-gel method, Journal of Materials Science. Vol.45, 1622-1628, 2010 Reversible promotional effect of SiO2 modifiion to Co/Al2O3 alyst for Fischer-Tropsch synthesis, Applied
2010/10/18· mechanism in the sol - precipitation process (G.H. Bogush and C. F. Zukoski, 1991), a huge nuer of p r imary pa tc les is firstnuc ea ed in the n a high sup ersa tura ed solution wh ch ca l d the nd c on pe riod. Th en, the pr mary p rticl s pidly
TiO 2 photoalysts deposited on SiC (TiO 2-SiC) prepared by the calcination of the TiC-SiC precursor showed high photoalytic reactivity for the degradation of 2-propanol diluted in water. TiO 2 -SiC photoalyst showed the higher photoalytic reactivity than the TiO 2 -SiO 2 photoalyst prepared by the conventional sol-gel method.
High surface area carbonate apatite nanorod bundles: surfactant-free sonochemical synthesis and drug loading and release properties. Materials Research Bulletin , 48, 1536-1540 (2013). (IF 2012 = 1.913)
6. Hu Zhou, Jiacheng Wang, JiandongZhuang, and Qian Liu, “A Covalent Route to Efficient Surface Modifiion of Ordered Mesoporous Carbon as High Performance Microwave Absorber”, Nanoscale, 2013, 5, 12502-12511. 7.
surface area and low flow resistance in coination with thermal and chemical stability. We have developed a bottom-up approach to functional, porous, high-temperature ceramics structured on eight distinct length scales integrating functional Pt nanoparticles from the near-atomic to
Low-temperature synthesis of mesoporous nanocrystalline magnesium aluminate (MgA1(2)O(4)) spinel with high surface area using a novel modified sol-gel method. Advanced Powder Technology , …
The mesoporous silica materials, MCM-41, with controlled pore size were synthesized under acidic, basic conditions at room temperature and hydrothermal basic condition.The characteristics of samples were investigated using XRD, HRTEM, and N 2 adsorption
2015/12/16· obtain N-doped mesoporous few-layer carbon with properties comparable to OMFLC-N SM. This is by coining CVD with a sol-gel process containing a ol made of polyethylene glycol s (PEG, as n inexpensivea pore-forming agent and C source), urea (as an
Hierarchically porous SiC ultrathin fibers mat with enhanced mass transport, amphipathic property and high-temperature erosion resistance, Journal of Materials Chemistry A, 2014, 2(48), 20873-20881.（SCITOP, IF: 8.3） Yingde Wang*, Cheng Han
In this work, the glasses start as “aigels”—aient dried aerogels—made by a sol-gel process from preceramic polymers and pyrolyzed to form glassy SiOC. The gels are highly porous and therefore have a very high surface area, and so do the glasses—the paper reports BET specific surface area of 150m 2 /g with a total volume of 0.19 cm 3 /g for SiOC after pyrolyzing at 1,400 ° C.
high sol-gel temperature of 38 C. After sample SIC-1 was post-calcined for 2 hours at an over high post-calcination temperature of 700 C, a kind of large nano-flakes was formed of sample SIC-700 and the initial mesoporous structure collapsed.
The characterization study has been completed by the determination of the specific surface area (), pore volume (), and -potential of all produced silica nanoparticles: after being calcined, loaded, and loaded/encapsulated.Table 1 shows the BET surface area ( (m 2 /g)), pore volume ( (cm 3 /g)), and -potential (mV) obtained on the different nanoparticles.
Mesoporous silica nanostructured sorbents such as SBA-15 and MCM-41 with a very high surface area and pore volume (), uniform and tunable pore size (), high thermal and mechanical stability and capability of functionalization by conenation of organic
Two families of ordered mesoporous materials, MCM-41 and SBA-15, were synthesized by the sol-gel method. Four variations in surfactant/silica molar ratio were applied to each one. MCM-41 samples: These materials were synthesized at room
Iran. J. Chem. Chem. Eng. Preparation and Characterization of Colloidal … Vol. 27, No. 4, 2008 67 Fig. 3: The influence of the silicic acid concentration on the mean particle size of colloidal silica (100 C). Fig. 4: The influence of the ASC on the mean particle
desired mesoporous material as a negative structural replica of the hard template. Soft vs. hard templated synthesis One of the significant disadvantages of the soft templating process is poor control over the condensation reaction, as it relies on sol-gel
The interest in SBA-15 nanoporous silica matrix 4 is due to their unique quality: a high surface area, wide pores with a uniform pore size distribution, and good chemical and mechanical properties. Nanoporous silica materials with cylindrical pores, such as SBA-15 5 , are often used as a porous matrix for alysts as they are efficient alysts in organic reactions 6 , 7 .
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