Direct Synthesis of Isolated L10 FePt Nanoparticles in a Robust TiO2 Matrix via a Combined Sol–Gel/Pyrolysis Route

2006 ◽  
Vol 18 (4) ◽  
pp. 466-470 ◽  
Author(s):  
J. Sort ◽  
S. Suriñach ◽  
M. D. Baró ◽  
D. Muraviev ◽  
G. I. Dzhardimalieva ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Fept Nanoparticles ◽  
Tio2 Matrix

Direct Synthesis of 3,5-Dinitropyrazole Catalyzed by Newly Sulfated Nanosolid Superacid TiO2/ SO

2011 ◽  
Vol 391-392 ◽  
pp. 1296-1301
Author(s):  
Li Min Xi ◽  
Xin Xin Zhang
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Acid Base ◽  
Direct Transformation ◽  
Acid Base Titration ◽  
Optimal Reaction Condition ◽  
Superacid Catalyst ◽  
Average Size ◽  
Optimal Reaction ◽  
Xrd And Tem

The newly sulfated nanosolid superacid TiO2/SO4 prepared by sol-gel method was broadly characterized by acid base titration, XRD and TEM, which identified that the superfine solid TiO2/SO4 showing good dispersibility with average size of 27 nm belongs to kind of crystalline nanoparticles. With the help of the catalyst TiO2/SO4, the optimal reaction condition for direct transformation of pyrazole and nitrosonitric acid into 3, 5-Dinitropyrazole was n (pyrazol)=0.10 mol, m (TiO2/SO4 )＝1.5g, V(n-octannol)＝90mL, and V(nitrosonitric acid)＝50mL. Moreover, the optimal yield of the catalytic reaction reached up to 59.4% when the reaction time is 7 hours. The nanosolid superacid catalyst is still of high activity after regenerating eight times by calcination at 600。C.

Direct Synthesis and Size Selection of Ferromagnetic FePt Nanoparticles.

ChemInform ◽  
2007 ◽  
Vol 38 (32) ◽  
Author(s):  
Matthew S. Wellons ◽  
William H. III Morris ◽  
Zheng Gai ◽  
Jian Shen ◽  
James Bentley ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Fept Nanoparticles ◽  
Size Selection ◽  
Selection Of

Effects of Cu addition on the structure and magnetic properties of L10-FePt nanoparticles prepared by sol–gel method

2014 ◽  
Vol 72 (1) ◽  
pp. 156-160 ◽  
Author(s):  
Yang Liu ◽  
Yuhong Jiang ◽  
Naveen Kadasala ◽  
Xiaolong Zhang ◽  
Chenyi Mao ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Sol Gel ◽  
Fept Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method

Towards direct synthesis of fct-FePt nanoparticles by chemical route

2003 ◽  
Vol 93 (10) ◽  
pp. 7574-7576 ◽  
Author(s):  
B. Jeyadevan ◽  
A. Hobo ◽  
K. Urakawa ◽  
C. N. Chinnasamy ◽  
K. Shinoda ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Fept Nanoparticles ◽  
Chemical Route

Direct synthesis of fct-structured FePt nanoparticles at low temperature with assistance of poly(N-vinyl-2-pyrrolidone)

2007 ◽  
Vol 308 (2) ◽  
pp. 564-567 ◽  
Author(s):  
Takashi Iwamoto ◽  
Kinya Matsumoto ◽  
Yoshitaka Kitamoto ◽  
Naoki Toshima
Keyword(s):  
Low Temperature ◽  
Direct Synthesis ◽  
Fept Nanoparticles

Synthesis and Magnetic Properties of FePt Nanoparticles with Hard Nonmagnetic Shells

2007 ◽  
Vol 7 (1) ◽  
pp. 350-355 ◽  
Author(s):  
Shishou Kang ◽  
Shifan Shi ◽  
G. X. Miao ◽  
Zhiyong Jia ◽  
David E. Nikles ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Crystallographic Orientation ◽  
Sol Gel ◽  
Molar Ratio ◽  
Core Shell ◽  
Fept Nanoparticles ◽  
Shell Nanoparticles ◽  
Spherical Core ◽  
Size And Morphology ◽  
Core Shell Nanoparticles

Chemically synthesized FePt nanoparticles were coated with nonmagnetic SiO2 and MnO shells by sol–gel and polyol processes. TEM images show that the FePt/SiO2 nanoparticles exhibit a thick spherical shell. The size and morphology of the MnO shell can be controlled by changing the reaction temperature, the molar ratio of surfactants/Mn(acac)2, and/or the concentration of precursor. The morphology of the MnO shell can be either spherical-like or cubic-like, depending on whether the molar ratio of surfactants/Mn(acac)2 is less than or larger than 2. From XRD measurements, the spherical core/shell nanoparticles exhibit 3D random crystallographic orientation, while the cubic core/shell nanoparticles prefer (200) texture. The magnetic moment of FePt particles can be enhanced by coating with SiO2 and MnO shells. Furthermore, the agglomeration of FePt particles upon the thermal annealing can be significantly inhibited with SiO2 and MnO shells.

Direct synthesis of La9.33Si6O26 ultrafine powder via sol–gel self-combustion method

2008 ◽  
Vol 458 (1-2) ◽  
pp. 378-382 ◽  
Author(s):  
Changan Tian ◽  
Junliang Liu ◽  
Jun Cai ◽  
Yanwei Zeng
Keyword(s):  
Direct Synthesis ◽  
Sol Gel ◽  
Combustion Method ◽  
Ultrafine Powder

Direct synthesis of water dispersible superparamagnetic TGA capped FePt nanoparticles: One pot, one shot

2015 ◽  
Vol 156 ◽  
pp. 247-253 ◽  
Author(s):  
Deepak K. Jha ◽  
Komanduri S. Varadarajan ◽  
Anant B. Patel ◽  
Pritam Deb
Keyword(s):  
Direct Synthesis ◽  
Fept Nanoparticles ◽  
One Pot ◽  
Water Dispersible

Effects of Au content on the structure and magnetic properties of L10-FePt nanoparticles synthesized by the sol–gel method

2014 ◽  
Vol 215 ◽  
pp. 167-170 ◽  
Author(s):  
Yang Liu ◽  
Yuhong Jiang ◽  
Naveen Kadasala ◽  
Xiaolong Zhang ◽  
Chenyi Mao ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Sol Gel ◽  
Fept Nanoparticles ◽  
Gel Method ◽  
Sol Gel Method
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