Comparison of cracking activity of the core-shell composite MCM-41/HY & MCM-48/HY catalysts in the synthesis of organic liquid fuel from Mahua oil

2021 ◽  
pp. 112474
Author(s):  
Minglong Zhang ◽  
Ganesan Ramya ◽  
Kathirvel Brindhadevi ◽  
Ashraf Elfasakhany ◽  
Amany Salah Khalifa ◽  
...  
Keyword(s):  
Liquid Fuel ◽  
Organic Liquid ◽  
Core Shell ◽  
The Core ◽  
Mahua Oil ◽  
Shell Composite ◽  
Mcm 41

Magnetic Properties of Fe3O4/CoFe2O4 Composite Nanoparticles with Core/Shell Architecture

2020 ◽  
Vol 65 (10) ◽  
pp. 904
Author(s):  
V. O. Zamorskyi ◽  
Ya. M. Lytvynenko ◽  
A. M. Pogorily ◽  
A. I. Tovstolytkin ◽  
S. O. Solopan ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spinel Ferrite ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Cofe2o4 Nanoparticles ◽  
Core Diameter ◽  
The Core ◽  
Shell Particles ◽  
Interface Parameters ◽  
Shell Composite

Magnetic properties of the sets of Fe3O4(core)/CoFe2O4(shell) composite nanoparticles with a core diameter of about 6.3 nm and various shell thicknesses (0, 1.0, and 2.5 nm), as well as the mixtures of Fe3O4 and CoFe2O4 nanoparticles taken in the ratios corresponding to the core/shell material contents in the former case, have been studied. The results of magnetic research showed that the coating of magnetic nanoparticles with a shell gives rise to the appearance of two simultaneous effects: the modification of the core/shell interface parameters and the parameter change in both the nanoparticle’s core and shell themselves. As a result, the core/shell particles acquire new characteristics that are inherent neither to Fe3O4 nor to CoFe2O4. The obtained results open the way to the optimization and adaptation of the parameters of the core/shell spinel-ferrite-based nanoparticles for their application in various technological and biomedical domains.

Synthesis of Core-Shell Composite of Conductive Polymeric Materials onto Silica Using Supercritical Carbon Dioxide

MRS Advances ◽  
2020 ◽  
Vol 5 (40-41) ◽  
pp. 2121-2127
Author(s):  
Ssu-Hao Huang ◽  
Pei-Hua Chen ◽  
Yan-Ping Chen ◽  
Muoi Tang
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Polymeric Materials ◽  
Optimal Operation ◽  
Molar Ratio ◽  
Core Shell ◽  
The Core ◽  
Operation Conditions ◽  
Shell Composite ◽  
Supercritical Carbon

ABSTRACTThe polymerization of 3,4-ethylenedioxythiophene (EDOT) onto nanosilica (SiO2) was synthesized in this study by using supercritical carbon dioxide (SCCO2). With the addition of dopants of p-toluenesulfonic acid (p-TSA) or decylbenzene sulfonic acid (DBSA), the PEDOT/SiO2 composite became conductive. The product was characterized by FTIR spectroscopy and the core-shell structure was confirmed through the TEM images. The electrical properties were analyzed by UV-vis absorbance and four-point probe measurement. DBSA is shown as the better dopants with the molar ratio (DBSA/EDOT) of 0.2 at the reaction time of 48 hours. The maximum coating percentage is 63 wt% under the optimal operation conditions at 40oC and 280 bar. The conductivity is tuned up to 6.6×10-2 S/cm after the coating process.

Synthesis Technology of Silica Aerogels/Polystyrene Core-Shell Composite Materials

2010 ◽  
Vol 168-170 ◽  
pp. 1833-1836
Author(s):  
Gang Qiang Geng ◽  
Jing Tao Guo ◽  
Jun Jun Zou ◽  
Gong Xun Bian
Keyword(s):  
Composite Materials ◽  
Polymerization Process ◽  
System Component ◽  
Core Shell ◽  
Ultrasound Technique ◽  
The Core ◽  
Optimum Reaction ◽  
The Impact ◽  
Shell Composite

In order to obtain super aerogels heat insulating composite materials with silane coupling agent on the in-situ surface treatment. The core-shell structure composite materials have been prepared by dispersion polymerization process of polystyrene grafted on the SiO2 particles. By TEM on these samples the impact of the system components initiator polymerization parameters and dispersion process was discussed. The results showed that the system component of the greatest impact on conversion rate is the ratio of aerogels /St ,the optimum reaction temperature is 75 °C.With organic initiator KPS as initiator after a unique ultrasound technique to obtain the core-shell composite materials structure which coating is 70%.

Polypyrrole-stabilized gold nanorods with enhanced photothermal effect towards two-photon photothermal therapy

2015 ◽  
Vol 3 (22) ◽  
pp. 4539-4545 ◽  
Author(s):  
Cuiling Du ◽  
Anhe Wang ◽  
Jinbo Fei ◽  
Jie Zhao ◽  
Junbai Li
Keyword(s):  
Tumor Cells ◽  
Gold Nanorods ◽  
Photothermal Therapy ◽  
Photothermal Effect ◽  
Core Shell ◽  
Two Photon ◽  
The Core ◽  
Shell Composite

The core–shell composite of Au–polypyrrole nanorods with high two-photon photothermal effect and stability could efficiently kill tumor cells under irradiation.

Controlled Synthesis of Core-Shell Structure SiO2 /NaGdF4:Eu3+ Magnetic and Optical Bifunctional Composite

2014 ◽  
Vol 936 ◽  
pp. 359-363
Author(s):  
Yan Li Wu ◽  
Min Liao ◽  
Hai Xin Ding ◽  
Ru Chun Yang ◽  
Dan Dan Xiong ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Shell Structure ◽  
Photo Luminescence ◽  
Core Shell ◽  
Controlled Synthesis ◽  
X Ray Diffraction ◽  
X Ray ◽  
The Core ◽  
Core Shell Structure ◽  
Shell Composite

The SiO2/NaGdF4:Eu3+ core/shell composite was prepared by a template-mediated method, making monodispersed SiO2 as core and NaGdF4:Eu colloids as shell, the morphology and the core-shell structure of the resulting particles were analyzed by SEM,X-ray diffraction, and the photo-luminescence and magnetic properties of the microspheres were investigated too. The results shows the composite have great potential to be used as homogeneous magnetic/optical bifunctional material.

The Organic/Inorganic Interface in Micro and Nano Composite Materials

2003 ◽  
Vol 796 ◽  
Author(s):  
Zhexiong Tang ◽  
Hui Wan ◽  
Robert Clark ◽  
Sze C. Yang
Keyword(s):  
Composite Particles ◽  
Core Shell ◽  
Electronic Interaction ◽  
Material Synthesis ◽  
Core Component ◽  
Polymer Shell ◽  
Nano Composite ◽  
Inorganic Oxide ◽  
The Core ◽  
Shell Composite

ABSTRACTWe report the synthesis of new inorganic/organic composite particles with a core/shell structure. The core component is an inorganic oxide (e.g. TiO2, CeO2 or MoO3), and the shell component is a double-strand polyaniline. Three methods for material synthesis were examined. The electrochemical properties of one type of the composite particles show electronic interaction between the organic conducting polymer shell and its inorganic core. The double-strand polyaniline in the composite shows better pH stability of the conductive form than that of the corresponding single-strand polyaniline in a similar core/shell composite.

The Core/Shell Composite Nanowires Produced by Self-Scrolling Carbon Nanotubes onto Copper Nanowires

ACS Nano ◽  
2009 ◽  
Vol 3 (8) ◽  
pp. 2235-2240 ◽  
Author(s):  
Keyou Yan ◽  
Qingzhong Xue ◽  
Dan Xia ◽  
Huijuan Chen ◽  
Jie Xie ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Core Shell ◽  
Copper Nanowires ◽  
The Core ◽  
Shell Composite

Facile preparation and enhanced microwave absorption properties of core–shell composite spheres composited of Ni cores and TiO2 shells

2015 ◽  
Vol 17 (14) ◽  
pp. 8802-8810 ◽  
Author(s):  
Biao Zhao ◽  
Gang Shao ◽  
Bingbing Fan ◽  
Wanyu Zhao ◽  
Yajun Xie ◽  
...  
Keyword(s):  
Microwave Absorption ◽  
Core Shell ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
The Core ◽  
Facile Preparation ◽  
Shell Composite

The microwave absorption properties of the core–shell Ni@rutile TiO2 composite are superior to those of the Ni@anatase TiO2 composite.

scholarly journals Electrospun Core-Shell Hollow Structure Cocatalysts for Enhanced Photocatalytic Activity

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Fengyun Guo ◽  
Ziyi Guo ◽  
Lei Gao ◽  
Dongming Qi ◽  
Guichu Yue ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Hollow Structure ◽  
Composite Fiber ◽  
Core Shell ◽  
Composite Fibers ◽  
The Core ◽  
Excellent Photocatalytic Activity ◽  
Repeated Use ◽  
Shell Composite ◽  
High Temperature Calcination

The core-shell NaYF4/Yb/Tm/TiO2 hollow composite fibers were prepared by coaxial electrospinning and high-temperature calcination. The composite fibers exhibit excellent photocatalytic activity under the dual synergistic of regulating the core-shell hollow microstructure and the composition by doping nanoparticles. Compared with commercial P25 and hollow fiber without nanoparticles, the degradation efficiency of rhodamine B using the core-shell composite fiber was significantly improved up to 99%. Moreover, the nanoparticles in the composite fibers can exist stably and maintain good structure and photocatalytic activity after repeated use. Therefore, the composite fiber has a wide application prospect in photocatalytic degradation of organic pollutants.

Preparation and Characterization of Platinum/Polyaniline Core-Shell Composite

2011 ◽  
Vol 347-353 ◽  
pp. 3302-3305
Author(s):  
Jing Na Zhu ◽  
Zhen Lu Shen ◽  
Wei Min Mo ◽  
Mei Chao Li
Keyword(s):  
Electron Microscopy ◽  
Interfacial Polymerization ◽  
Core Shell ◽  
The Core ◽  
Transmission Electron ◽  
Shell Composite ◽  
Synthesis Approach ◽  
Granular Morphology ◽  
Platinum Salt

Abstract. The core-shell composite of platinum/polyaniline (Pt@PAN) had been prepared by chemical synthesis approach. Reduction of the platinum salt in aqueous solution leaded to the formation of platinum nanoparticles, and then polyaniline were synthesized by interfacial polymerization to get Pt@PAN composite. Transmission electron microscopy of Pt@PAN showed Pt particles are uniform with spherical and granular morphology. Pt@PAN was also characterized by EDAX, XPS and FTIR.

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