PDF Publication Title:
Text from PDF Page: 161
2.2. Synthesis and Characterization of YS-TS-1@mSiO2 The yolk-shell structured TS-1@mesosilica composite (YS-TS-1@mSiO2) was prepared using a resorcinol-formaldehyde resin (RF) middle-layer as the sacrificial template. Following a published report [31], the TS-1 crystals were first coated with the RF layer via simple cooperative template-directed coating method to form core-shell structured TS-1@RF. A successful coating was confirmed from the large decrease in the nitrogen uptake at low P/P0 (0–0.01) (Figure 5e), and the microporous surface area from 249.3 m2 g−1 to 36 m2 g−1 of the synthesized TS-1@RF. A similar coating for CS-TS-1@mSiO2-30 was also done to obtain sandwich type TS-1@RF@mSiO2. This was followed by the removal of the middle-layer RF, surfactant CTAB and structure direct agent TPA+ by calcination at 550 ◦C in air for 6 h, which yielded YS-TS-1@mSiO2 with an open hierarchical pore structure from the inherent micropore in TS-1 core and the mesopore in mSiO2 shell to nanocapsule. The sandwich type TS-1@RF@mSiO2 displays a similar oval sharp as that of CS-TS-1@mSiO2-30 and a larger particle diameter (410–450 nm) (Figure 5a). By contrast, the obtained YS-TS-1@mSiO2 exhibits a distinct yolk-shell structure after the simple calcination process in air (Figure 5b,c). One mSiO2 shell encapsulates one TS-1 crystal and a void space of around 15 nm between the TS-1 core and mSiO2 shell is clearly observed from the TEM images (Figure 5b,c). Moreover, the SEM image (Figure 5d) shows some broken particles indicated by white arrows, further confirming the yolk-shell structure. In addition, identical with the CS-TS-1@mSiO2 composites, the YS-TS-1@mSiO2 also exhibit a retained uptake at low P/P0 (type-I curves) and typical type-IV curves with a capillary condensation step at moderate P/P0(0.2–0.6) as well as a distinct hysteresis loop of H2 type. On the other hand, the corresponding DFT PSD not only shows two sharp peaks centered at 0.55 nm and 2.8 nm that was ascribed to the micropores in TS-1 core and mesopores in mSiO2 shell, respectively, but also a broad small peak in the range of 10–20 nm, which resulted from the void space between the TS-1 core and the mSiO2 shell. This phenomenon is in good agreement with the TEM result. YS-TS-1@mSiO2 shows a high BET surface area of 695 m2 g−1 (Table 1). All these results demonstrated that we were able to successfully prepare a TS-1-based nanocomposite consisted of a TS-1 core and a mSiO2 shell as well as a void space of around 15 nm between the core and the shell. The FT-IR and UV-Vis spectra (Figure 4A,B) also reveal that the nature and coordination of Ti species keeps identical with pristine TS-1. 146PDF Image | Zeolite Catalysis
PDF Search Title:
Zeolite CatalysisOriginal File Name Searched:
Zeolite_Catalysis.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)